Introduction. The accurate impact of exercise on coronary artery disease (CAD) patients with left ventricular dysfunction is still debatable. We studied the effects of cardiac rehabilitation (CR) on echocardiography parameters in CAD patients with ventricular dysfunction. Methods. Patients with CAD who had ventricular dysfunction were included into an exercise-based rehabilitation program and received rehabilitation for eight weeks. All subjects underwent echocardiography before and at the end of the rehabilitation program. The echocardiography parameters, including left ventricular ejection fraction (LVEF), LV end-diastolic (LVEDD) and end-systolic diameters (LVESD), and peak exercise capacity measured in metabolic equivalents (METs), were assessed. Results. Seventy patients (mean age = 57.5 ± 10.2 years, 77.1% males) were included into the study. At the end of rehabilitation period, the LVEF increased from 45.14 ± 5.77% to 50.44 ± 8.70% (P < 0.001), and the peak exercise capacity increased from 8.00 ± 2.56 to 10.08 ± 3.00 METs (P < 0.001). There was no significant change in LVEDD (54.63 ± 12.96 to 53.86 ± 8.95 mm, P = 0.529) or in LVESD (38.91 ± 10.83 to 38.09 ± 9.04 mm, P = 0.378) after rehabilitation. Conclusion. Exercise training in postmyocardial infarction patients with ventricular dysfunction could have beneficial effects on cardiac function without adversely affecting LV remodeling or causing serious cardiac complications.
Background. Tobacco use continues to be the leading global cause of preventable death. The majority of smokers begin using tobacco products at teen ages. The aims of this study were providing a methodology of Isfahan Tobacco Use Prevention Program and investigating the prevalence of tobacco use and its related factors. Method. It was a cross-sectional study among guidance and high school students in Isfahan province. Initiation, social, psychological (depression and self-efficacy), family, and attitudinal and belief factors and school policy toward smoking (cigarettes and water-pipe) were investigated. Saliva qutinin was given from 5% of participants for determination of accuracy of responses. A self-administered anonymous questionnaire was used for gathering all data. Results. Of all 5500 questionnaires distributed, about 5408 completed questionnaires were returned (with response rate of 98.3%). Of all participants, 2702 (50.0%) were girls and 2706 (50.0%) were boys. Respectively, 4811 (89.0%) and 597 (11.0%) were from urban and rural. Of all participants, 2445 (45.2%) were guidance school and 2962 (54.8%) were high school students. Conclusion. This study will provide a unique opportunity to study prevalence of smoking cigarettes and water-pipe (ghelyan) among guidance and high school students in Isfahan province and determine the role of initiation, social, psychological, family, and attitudinal and belief factors and school policy toward smoking.
Vast majority of cardiac patients who refer to cardiac rehabilitation program (CRP) are obese and obesity is associated with coronary heart disease (CHD). So, the aim of this study is to investigate the effects of CRP on obesity indexes, lipid profiles, and functional capacity (FC) in obese men with CHD and to explore whether significant weight reduction affected these risk factors and FC or not.
Materials and Methods:
In an observational study, we evaluated 536 patients, including 464 non-obese men and 72 obese men. All participants completed CRP for 2 months; then, obese patients were divided into two groups: patients with weight reduction ≥ 5% and patients who didn’t have significant weight reduction. Data were analyzed with SPSS software version 15. For comparing the mean of outcomes independent t-tests and paired t-tests were used.
Results showed following CRP, non-obese men had significant improvement in obesity indexes (P = 0.00), lipid profiles (P < 0.05), and FC (P = 0.00) and in obese men, favorable improvement were seen in obesity indexes (P = 0.00), FC (P = 0.00), and total cholesterol (P = 0.02). Comparing two groups revealed that there were significant differences in obesity indexes, high-density lipoprotein cholesterol, and low-density lipoprotein cholesterol/high-density lipoprotein cholesterol ratio. In addition, comparing subgroup of obese patients revealed that there were significant differences in FC (P = 0.00) and low-density lipoprotein cholesterol/ high-density lipoprotein cholesterol ratio (P = 0.04).
CRP has more advantage in management of obesity, FC, and lipid profiles in both obese and non-obese patients. Also, weight reduction may cause greater improvement in FC and fitness levels in obese men with CHD.
Coronary artery disease; obesity; risk factor cardiac rehabilitation program; weight reduction
Cardiovascular diseases (CVDs) constitute 53% of deaths above the age of 30; 54% of these deaths are attributed to high blood pressure. Coronary artery disease (CAD) is the main cause of mortality in the world. Hypertension accounts for 13% of mortalities and 6% of morbidities and is one of the main risk factors that cause loss of healthy life years. Blood pressure is not optimally controlled even among those who are aware of their disease. Previous studies showed that apart from pharmacological treatment, lifestyle improvement can also play a significant role in the prevention of high blood pressure CVDs. Self-care among them has been addressed in several previous studies. There are few self-care programs in Iran, but no study has been conducted on blood pressure.
In this study the primary model is designed and then revised, and in the pilot study the feasibility of the project was approved and the final model presented.
The current project proposes a model for self-care of hypertensive patients and their families, and is based on education of health care providers and patients in such a way that patients can control their illness.
The model can be implemented at a national scale.
Self-Care; Hypertension; Model
The present trial aimed to investigate the effects of pioglitazone on the serum level of asymmetric dimethylarginine (ADMA), a marker of endothelial function, and some indices of inflammation and glucose and lipid metabolism in nondiabetic metabolic syndrome patients. 104 eligible participants (57% female; age between 20 and 70) were enrolled in a double-blind placebo-controlled trial and were randomized to receive either pioglitazone (uptitrated to 30 mg/day) or matching placebo for 24 weeks. Participants were clinically examined and a blood sample was obtained at baseline and at the end of the trial. Pioglitazone significantly improved C-reactive protein level irrespective of changes in insulin sensitivity. Compared with the placebo group, alanine and aspartate transaminases were decreased and high-density lipoprotein cholesterol was increased after treatment with pioglitazone. A considerably greater weight gain was also recorded in the intervention group. We failed to observe any significant changes in serum ADMA in either group and between groups with and without adjustment for age, sex, and components of the metabolic syndrome. In a nutshell, pioglitazone seems to have positive effects on lipid profile, liver transaminases, and systemic inflammation. However, its previously demonstrated endothelial function-improving properties do not seem to be mediated by ADMA.
To evaluate the association of apolipoprotein B (apoB), apolipoprotein A (apoA), and apoB/apoA ratio with the body fat indicators in patients with stable angina pectoris (SA).
Materials and Methods:
One hundred and twenty two participants aged 40-60 years old, with a mean age of 52.1 ± 7.2 years and SA, were recruited for the present study. Body weight, height, and waist circumference (WC) were measured, and waist to height ratio (WHtR) was calculated. After 12 hours of fasting, a blood sample was obtained and serum levels of apoB and apoA were measured and the apoB/apoA ratio was calculated. These patients underwent an abdominal computerized tomography scan (CTS) to assess visceral and subcutaneous adipose tissue (VAT, SAT). Linear regressions were computed to assess the relation of apoB, apoA, and their ratio with various measurements of adiposity (VAT, SAT, WC, and WHtR), with adjustment for age, sex, and BMI ≥ 25, WC ≥ 80 in women and WC ≥ 90 in men and WHtR ≥ 0.59.
From totally 123 patients with SA with a mean age of 52.1 ± 7.2 years, 44.7% male and 55.3% women were entered. Significant positive associations were found between visceral fat area and the apoB/apoA ratio (P = 0.02, β = 0.2), and significant negative correlations were observed between visceral fat area and apoA concentrations (P = 0.04, β = −0.2).
As abdominal fat accumulation is associated with other risk factors such as apolipoproteins in ischemic patients, then we most focus on control of these factors.
Apolipoprotein A; apolipoprotein B; apolipoprotein B/apolipoprotein A; cardiovascular disease; intra-abdominal fat
This study aimed to investigate whether body mass index (BMI), waist circumference (WC), or waist to hip ratio (WHR) could be a better predictor of metabolic syndrome and, if so, what would be the cutoff points for these surrogates to appropriately differentiate metabolic syndrome in different age and sex subgroups. Methods. The present cross-sectional study was conducted on a sample of Isfahan Cohort Study (ICS). In total, 468 individuals (194 with and 274 subjects without metabolic syndrome) according to the National Cholesterol Education Program's Adult Treatment Panel III (ATP-III) criteria were selected. Anthropometric indices were measured and plotted using receiver-operating characteristic (ROC) curves. Results. According to ROC curve analysis, WC and WHR parameters were better indicators of metabolic syndrome compared to BMI in women, whereas in men WHR had a lower discriminating value compared to the other two parameters. Among these three anthropometric parameters, BMI had a lower sensitivity and WC and WHR both had a higher sensitivity for predicting metabolic syndrome in women compared with in men. The cut points for WC were nearly equal in men and women, 90.3 versus 90.0, respectively. Women had higher cut points for BMI (28.5 kg/m2) compared to men (26.0 kg/m2). Our results showed the highest sensitivity and specificity for WC cut points specially in women. To predict metabolic syndrome, we looked into optimal age-specific cut points for BMI, WC, and WHR. The results indicated that WC had the highest discriminating value compared to other indicators in the different age subgroups. The optimal cut points for all three parameters gradually increased with age. Conclusion. Our results demonstrated that regardless of gender and age variables, WC could be a preferred parameter for predicting metabolic syndrome compared to BMI and WHR in Iranian population.
Few studies have investigated changes in autonomic function after training in patients with cardiovascular diseases, particularly patients with congestive heart failure (CHF). Heart rate recovery (HRR) is a strong predictor of mortality in coronary artery disease (CAD) patients. The aim of this study was to determine the effect of 8 weeks of supervised exercise training on autonomic function, which were assessed by heart rate, systolic blood pressure (SBP), and rate-pressure product (RPP) in CHF patients.
65 patients aged 57-82 years with CHF were assigned to two groups randomly. The first group received a supervised 8-week aerobic training program of 30-45 min sessions, 3 days per week on alternate days, while controls received standard medical care and were followed up. Body weight, body mass index, functional capacity, resting heart rate, HRR, resting systolic blood pressure, peak heart rate, peak systolic blood pressure, and RPP were measured before and after the study period. Medications and diet recommendations remained unchanged in both groups during the study period.
The exercise group consisted of 33 patients with mean age of 61.54 ± 5.89 years and the controls were 32 patients with mean age of 60.94 ± 5.03 years. One-way analysis of variance (ANOVA) with repeated measures revealed a statistically significant difference in the exercise group compared to the control group regarding body mass index, resting heart rate, heart rate recover, functional capacity, peak heart rate, peak systolic blood pressure, peak RPP after 8 weeks (P ≤ 0.05).
In conclusion, a multidisciplinary CR program with supervised exercise training support significantly improves functional capacity and autonomic function in CHF patients. Therefore, a supervised and guided exercise training program is safe and beneficial for patients with CHF with different etiologies.
Aerobic Exercise; Cardiorespiratory Fitness; Hemodynamics; Autonomic Function; CHF
Heart failure is one of the chronic heart diseases and a debilitating condition of increased prevalence in the elderly. One of the important and non-pharmacological strategies for improving clinical outcomes in these patients is promotion of the self-care. Background and social environment in which a patient is trying to control his disease is an important factor in the self-care. The aim of this study was to evaluate the effects of family support intervention on the self-care behaviors in patients with heart failure.
Materials and Methods:
This study was a randomized clinical trial conducted in university hospitals in Isfahan, Iran, in 2012. A total of 62 patients with heart failure were randomly assigned to experimental (n = 32) and control (n = 32) groups. Supportive intervention including three educational sessions with the delivery of educational booklet and follow-up by telephone was performed for caregivers of patients in the experimental group. Data were collected using the questionnaire of self-care behaviors, which was completed before and 1 month after the intervention in both the groups, and the questionnaires were analyzed using descriptive statistics and independent and paired t-tests.
The results indicate that after the intervention, self-care behavior scores in the experimental group and control group were 47.2 and 28.4, respectively, and independent t-test revealed that the difference was statistically significant.
Family-focused supportive interventions can be used as an effective method for improving the self-care behaviors in patients with heart failure.
Behavior; family support; heart failure; Iran; self-care
Objectives. Stressors have a serious role in precipitating mental and somatic disorders and are an interesting subject for many clinical and community-based studies. Hence, the proper and accurate measurement of them is very important. We revised the stressful life event (SLE) questionnaire by adding weights to the events in order to measure and determine a cut point. Methods. A total of 4569 adults aged between 18 and 85 years completed the SLE questionnaire and the general health questionnaire-12 (GHQ-12). A hybrid model of genetic algorithm (GA) and artificial neural networks (ANNs) was applied to extract the relation between the stressful life events (evaluated by a 6-point Likert scale) and the GHQ score as a response variable. In this model, GA is used in order to set some parameter of ANN for achieving more accurate results. Results. For each stressful life event, the number is defined as weight. Among all stressful life events, death of parents, spouse, or siblings is the most important and impactful stressor in the studied population. Sensitivity of 83% and specificity of 81% were obtained for the cut point 100. Conclusion. The SLE-revised (SLE-R) questionnaire despite simplicity is a high-performance screening tool for investigating the stress level of life events and its management in both community and primary care settings. The SLE-R questionnaire is user-friendly and easy to be self-administered. This questionnaire allows the individuals to be aware of their own health status.
The prevalence of metabolic syndrome (MetS) is increasing among children and adolescents. However, the prevalence of this disorder varies based on its different definitions. This study aimed to determine the prevalence of MetS in Iranian adolescents in junior high and high schools according to the definitions provided by the International Diabetes Federation (IDF) and De Ferranti.
Overall, 1039 junior high school and 953 high school students were selected using multistage random sampling. Demographic data was collected using validated questionnaires. Fasting blood sugar, total cholesterol, triglyceride, high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) levels were determined. Waist circumference and blood pressure were measured by trained individuals. Subjects with MetS were selected according to two definitions provided by the IDF and De Ferranti. Chi-square and Fisher’s exact tests were used to compare the prevalence of MetS and its components based on sex, school level, and the two definitions.
The mean age of junior high and high school students was 13.11 ± 1.21ad 15.93 ± 1.07 years old, respectively. The prevalence of MetS among all participants was 4.8% and 12.7% according to the definitions by the IDF and De Ferranti, respectively. It was significantly higher among boys compared to girls. According to the IDF definition, low HDL-C and hypertension were the most frequent components. Based on the De Ferranti, abdominal obesity and hypertriglyceridemia were the most frequent components.
The prevalence of MetS was higher in both groups of students based on De Ferranti definition compared to the IDF definition. The prevalence was not significantly different in boys and girls. Further studies to investigate the most suitable definition of MetS for Iranian adolescents are necessary.
Metabolic Syndrome; Adolescence; International Diabetes Federation and De Ferranti
Hypertension is a major risk factor for cardiovascular diseases. It affects approximately 18.0% of Iranian adults. This study aimed to estimate age-adjusted prevalence of hypertension and its control among Iranian persons older 19 years of age. It also tried to find and socioeconomic factors associated with hypertension control in Iranian population.
In Isfahan Healthy Heart Program (IHHP) subjects were selected by multistage random sampling. The participants completed questionnaires containing demographic information, lifestyle habits, medical history, and consumption of relevant medications, especially antihypertensive agents. Income, marital status, and educational level were considered as socioeconomic factors. Hypertension was defined as systolic blood pressure ≥ 140 mmHg, diastolic blood pressure ≥ 90 mmHg, or taking antihypertensive medications. Controlled hypertension was considered as systolic blood pressure < 140 mmHg and diastolic blood pressure < 90 mmHg among hypertensive subjects.
The prevalence of hypertension and controlled hypertension was 18.9% and 20.9%, respectively. We found significant relationships between hypertension and marital status, education, and income. At age ≥ 65 years old, odds ratio (OR) was 19.09 [95% confidence interval (CI): 15.01-24.28] for hypertension. Middle family income (OR: 0.71; 95% CI: 0.58-0.87) and education level of 6-12 years (OR: 0.29; 95% CI: 0.25-0.35) were significantly associated with increased risk of hypertension (P = 0.001). Among subjects aging 65 years old or higher, the OR of controlled hypertension was 2.64 (95% CI: 1.61-4.33). Married subjects had a higher OR for controlled hypertension (OR: 2.19; 95% CI: 1.36-3.52). Obesity had no significant relationships with controlled hypertension.
The IHHP data showed significant relationships between some socioeconomic factors and controlled hypertension. Therefore, as current control rates for hypertension in Iran are clearly unacceptable, we recommend preventive measures to control hypertension in all social strata of the Iranian population.
Socioeconomic Factor; High Blood Pressure; Control
First experiences of tobacco use usually occur in adolescence. The recognition of social norms leading to youth smoking is hence necessary. We tried to assess the social norms among Iranian young cigarette and hookah smokers.
This cross-sectional study was conducted on 451 girls and 361 boys aging 20-25 years old who entered Isfahan and Kashan Universities (Iran) in 2007. Demographic factors (age, gender, and age at smoking onset) cigarette and hookah smoking status, having a smoking father or smoking friends and four related social norms were recorded. Binary logistic regression analysis was used to separately determine associations between hookah and cigarette smoking and the four social norm variables.
Cigarette and hookah smokers had significant differences with nonsmokers in two social norms: “Perceived smoking by important characters” [odds ratio (OR) = 1.35 in cigarette smokers and 1.58 in hookah smokers; P < 0.001] and “smoking makes gatherings friendly” (OR = 3.62 in cigarette smokers and 6.16 in hookah smokers; P < 0.001). Furthermore, cigarette and hookah smoking were significantly associated with having smoking friends.
Highlighting the social norms leading to cigarette and hookah smoking may help policy makers develop comprehensive interventions to prevent smoking among adolescents.
Cigarette; Hookah; Smoking; Social Norm
Although psychological factors play an important role in coronary heart diseases (CHD), it seems there is a need for more researches in this respect. The present study aimed to review psychological factors, including depression, anxiety and stress related to etiology and prognosis of CHD.
This was a review on medical and psychological literatures, particularly in the years 1995-2012.
As protective factor or risk factor, psychological factors play an important role in CHD.
Given the findings of this study, it seems necessary that we pay attention to psychological factors, as independent risk factors or protective factors for CHD.
Coronary Heart Disease; Psychological Factors; Depression; Anxiety; Stress
Cardiovascular disorders are an important public health problem worldwide. They are also the leading cause of mortality and morbidity. Therefore, American Heart Association proposed cardiac rehabilitation program as an essential part of care for cardiac patients to improve functional capacity. The aim of this study was to evaluate the effectiveness of cardiac rehabilitation program on functional status and some hemodynamic responses in patients after coronary artery bypass graft (CABG) surgery.
Thirty two patients were selected for this study. All patients underwent cardiac surgery two months before admission. They were allocated to two groups. While the rehabilitation group (n =17, mean age: 62 ± 12 years) completed the cardiac rehabilitation program for two months, the reference group (n = 15, mean age: 58.5 ± 12.5 years) did not have any supervised physical activity during this period. Cardiac rehabilitation program consisted of exercise, nutritional, psychological consultation and risk factor management. At the beginning of the study, functional capacity of patients was evaluated by exercise test, 6-minute walking test and echocardiography. Functional capacity was evaluated for a second time after two months of cardiac rehabilitation. Data were analyzed by SPSS15. For comparing the mean of outcomes, Mann-Whitney test and Wilcoxon signed ranks test were used.
As a result of cardiac rehabilitation, a significant improvement was observed in the distance walked in the rehabilitation group (P < 0.01) compared to the reference group (P = 0.33). It also caused a significant development in hemodynamic responses to exercise such as resting and maximum systolic and diastolic blood pressure, resting and maximum heart rate, ejection fraction and rate pressure product.
Cardiac rehabilitation significantly improves functional capacity and some hemodynamic responses post coronary artery bypass grafting. Therefore, patients need to be referred to rehabilitation units.
Cardiac Rehabilitation Program; Hemodynamic Responses; Coronary Artery Bypass Graft Surgery (CABG)
This study aimed to compare Iranian elderly with the middle-aged population in terms of the prevalence of metabolic syndrome and its components.
This cross-sectional study was conducted using the data from the third phase of the Isfahan Healthy Heart Program. Male and female residents of Isfahan over 19 years of age were selected by multistage cluster random sampling. A questionnaire including demographic characteristics, health status, medical history, medications used, as well as waist circumference, weight, height, and systolic and diastolic blood pressures was completed for all participants. Fasting blood samples were obtained from all subjects and examined for fasting blood sugar and lipid profile. T-test and Mann-Whitney test were used for quantitative data and chi-square test was performed for qualitative data.
The prevalence of metabolic syndrome in individuals aged over 60 years was significantly higher than those under 60 (49.5% vs. 17.5%, respectively; P < 0.001). Metabolic syndrome was also more prevalent among elderly females than in males (59.2% vs. 39.8%, respectively; P < 0.005). Some anthropometric measures such as height, body mass index, abdominal circumference, waist-hip ratio, and waist-to-height ratio were significantly different in men and women below 60 years in comparison with those over 60 years (P < 0.05). Moreover, there were significant differences in most studied parameters between the elderly and non-elderly women (P < 0.001).
This study showed that metabolic syndrome has a relatively high prevalence in Iranian elderly people, especially in elderly women. Therefore, early diagnosis and management of the complication are recommended among this high-risk group to avoid the subsequent complications.
Metabolic Syndrome; Elderly; Iran
This study was designed to assess the effectiveness of stress management training in improving the ability of coping with stress in a large population.
Five cross-sectional studies using multistage cluster random sampling were performed on adults aged ≥ 19 years between 2000 to 2005 in Isfahan and Najafabad (Iran) as intervention cities and Arak, Iran as the control city within the context of Isfahan Healthy Heart Program. Stress management training was adapted according to age and education levels of the target groups. In a 45-minute home interview, demographic data, General Health Questionnaire (GHQ) and stress management questionnaires were collected. Data was analyzed by t-test, linear regression and general linear model.
Trends of both adaptive and maladaptive coping skills and GHQ scores from baseline to the last survey were statistically significant in both intervention and reference areas (P < 0.001). While adaptive coping skills increased significantly, maladaptive coping skills decreased significantly in the intervention areas. Furthermore, stress levels decreased significantly in the intervention compared to the reference area.
Stress management programs could improve coping strategies at the community level and can be considered in designing behavioral interventions
Stress Management; Community; Intervention; Coping Strategies
Vitamin D deficiency is a prevalent condition in many countries. The aim of this study is to elucidate whether deficient vitamin D status is associated with coronary artery disease considering cardiovascular risk factors.
Materials and Methods:
We measured 25 (OH) D serum levels in 57 patients that were diagnosed with coronary artery disease upon coronary angiography and 62 individuals in the control group who were matched for age and sex with the patients and examined the association between serum 25 (OH) D and coronary artery disease with regard to cardiovascular risk factors.
The odds ratio of being affected by coronary artery disease in individuals with vitamin D deficiency (25 (OH) D < 30 ng/ml) was 5.8 (1.77 - 18.94) after adjustment with cardiovascular risk factors, i.e., blood pressure, diabetes, smoking, obesity, physical activity and high blood cholesterol in comparison with the control group.
Low levels of 25 (OH) D are associated with prevalent coronary artery disease independent of cardiovascular risk factors. Further investigations could demonstrate the need for vitamin D supplementations in order to prevent atherosclerosis.
Cardiovascular disease; coronary artery disease; risk factor; vitamin D deficiency
Numerous studies have reported prehypertension (pre-HTN) as a risk factor for the cardiovascular diseases as hypertension (HTN).
The present study aimed to evaluate the effects of pre-HTN on cardiovascular incidences among the females of Isfahan cohort study (ICS).
Materials and Methods:
Healthy female at baseline were followed for a median of 6.7 years. They were divided into 3 groups of normal blood pressure, pre-HTN (120/80 < BP < 139/89 mmHg) and HTN (BP > 140/90 mmHg) based on their baseline measurements. The endpoints were ischemic heart disease (IHD), stroke, CVD (combination of IHD and stroke) and mortality.
Normal BP, pre-HTN and HTN were observed in 1073 (33%), 1185 (36%), and 994 (31%) participants, respectively. One hundred and ninety-eight subjects developed CVDs and 110 died. In the HTN group, the hazard ratio [HRs (95% confidence interval)] adjusted for age and other risk factors were 3.44 (1.95–6.09) for IHD (P value < 0.001), 1.28 (0.59–2.77) for stroke (P value = 0.536) 4.89 (1.37–17.45) for CVD mortality (P value < 0.001) and 1.70 (0.98–2.96) for all cause mortality (P value = 0.060). Although, pre-HTN significantly increased the risk of IHD incidence in the crude model (HR 2.21, 95% CI 1.23–3.97) and after adjustments for age (HR 1.85, 95% CI 1.02–3.33), (P value < 0.001) the association did not remain statistically significant after including other risk factors in the model.
Hypertension (HTN) to be a strong risk factor for CVD and IHD. However, in contrast to previous researches, pre-HTN was not found to be a risk factor for CVD, IHD or death independent to other risk factors in women.
Cardiovascular disease; cohort study; coronary artery disease; hypertension; mortality; prehypertension
Current guidelines recommend cardiac rehabilitation programs (CRP) as a means to improve functional status of patients after coronary revascularization. However, research supporting this recommendation has been limited and positive effects of CRP on diastolic function are controversial. The aim of this study was to examine the effects of an 8-week CRP on left ventricular diastolic function.
This randomized, clinical trial included 29 men with ST elevation myocardial infarction (MI) who had received reperfusion therapy, i.e. coronary artery bypass grafting (CABG) or percutaneous coronary intervention (PCI). They were randomized to a training group (n = 15; mean age: 54.2 ± 9.04 years old) and a control group (n = 14; mean age: 51.71 ± 6.98 years old). Patients in the training group performed an 8-week CRP with an intensity of 60-85% of maximum heart rate. Exercise sessions lasted 60-90 minutes and were held three times a week. At the start and end of the study, all patients performed symptom-limited exercise test based on Naughton treadmill protocol. Pulsed-wave Doppler echocardiography was also used to determine peak velocity of early (E) and late (A) waves, E/A ratios, and the deceleration time of E (DT).
Left ventricular diastolic indices (E, A, E/A ratio, DT) did not change significantly after the CRP. Compared to baseline, patients in the training group had significant improvements in functional capacity (8.30 ± 1.30 vs. 9.7 ± 1.7) and maximum heart rate (118.50 ± 24.48 vs. 126.85 ± 22.75). Moreover, resting heart rate of the training group was significantly better than the control group at the end of the study (75.36 ± 7.94 vs. 79.80 ± 7.67; P < 0.001).
An 8-week CRP in post-MI patients revascularized with PCI or CABG led to improved exercise capacity. However, the CRP failed to enhance diastolic function.
Cardiac Rehabilitation; Diastolic Function; Functional Capacity; Post-Myocardial Patients
Lead contamination can affect many body organs including the heart. This study assessed a number of echocardiographic indices to clarify the effects of lead on cardiac function among battery factory workers who are in constant exposure to lead.
In a cross-sectional study, 142 male battery factory workers who had been exposed to lead for at least 1 year were evaluated. The subjects aged 25-55 years old and were excluded if they had hypertension, diabetes, or cardiovascular diseases. Demographic characteristics, professional profile, lead exposure, history of respiratory diseases, drugs intake, and lifestyle information of the participants were collected. Height, weight and blood pressure measurements were then performed. Blood tests were also ordered to determine blood lead levels. The subjects finally underwent M-mode and Doppler echocardiography. Linear regression analysis was used to establish the effects of lead on the target indices. All statistical analyses were conducted in SPSS18.
The mean age and mean duration of lead exposure of the subjects were 41.78 ± 13.58 and 23.54 ± 14.44 years, respectively. The mean blood lead level was 7.59 ± 2.75 µg/dl. Left ventricular hypertrophy was detected in 12% of the participants. Blood lead levels were not significantly related with echocardiographic indices in the crude model or after adjustments for age alone or for age and other risk factors.
Blood lead levels of our participants were below standard values. In addition, no significant relation was found between left ventricular function indices and blood lead levels. The absence of such relations could have been caused by the exclusion of individuals with hypertension or cardiovascular diseases. Structural modifications in battery factories following legislations in Iran might have been responsible for low blood lead levels among the subjects.
Occupational Exposure; Lead; Left Ventricular Echocardiography
Coronary artery disease (CAD) and myocardial infarction are the most common causes of mortality and morbidity all over the world. Aspirin resistance is an important part of therapeutic failure in patients who experience several atherosclerotic events despite aspirin therapy. Different studies have reported aspirin resistance between 5% and 45% all over the world.
According to different responses to aspirin therapy in countries and lack of adequate studies on aspirin resistance in Iran, this study was designed for evaluation of aspirin resistance in ischemic patients.
Materials and Methods:
Total 170 patients with documented coronary artery stenosis with were enrolled in this cross-sectional prospective study. Two cc urine samples were obtained from all the subjects. Then a questionnaire including questions about major risk factors (hypertension, diabetes, hyperlipidemia, obesity and smoking) was completed for each patient. Thromboxane B2 level in urine was measured two times for each patient by one kit of via ELISA method. Gensini modified was usedfor assessment of severity of coronary arteries involvement. Data were analyzed via SPSS 16. with general linear model (univariate).
75.3% of studied patients were aspirin resistant. There was significant relationship between angiography score and aspirin resistance (P<0.001).Our results also showed that aspirin resistance is more common in studied women than men (P=0.003).Significant correlation was observed between diabetes and aspirin resistance in studied subjects (P=0.023).
Our study showed aspirin resistance in a sample of Iranian ischemic patients is so prevalent which is higher than other studies in another communities and also aspirin resistance is more common in patients with severe CAD.
Aspirin resistance; coronary artery disease; thromboxane B2 level
Coronary artery disease (CAD) is the leading cause of death and disability all over the world. A sedentary lifestyle and dyslipidemia are known to be the major risk factors, which play an important role in the progression of coronary artery disease. Regarding gender differences, the risk of developing coronary heart disease is recognized as being different between non-obese males and non-obese females. Hence, the aim of this study is to assess the benefits of a comprehensive cardiac rehabilitation program (CRP) on the functional capacity and lipid profiles, such as, total cholesterol, triglycerides, low density lipoprotein cholesterol, and high density lipoprotein cholesterol in non-obese males and non-obese females with coronary artery disease, and comparing these groups.
Materials and Methods:
We evaluated 585 non-obese males and females with coronary artery disease. All the participants completed the cardiac rehabilitation program for two months, which included 24 exercise training sessions, medical evaluation, and consultation. For investigation of the effects of the cardiac rehabilitation program on the functional capacity and lipid profiles, exercise tests were carried out by each patient, and also, their blood samples were taken on entrance and at the end of this period.
The findings, following 24 sessions in the cardiac rehabilitation program, showed that the functional capacity (P = 0.00) and all lipid profiles had significantly improved in both the groups, except that the high density lipoprotein cholesterol did not show a significant difference in non-obese females. In addition, comparing the two groups did not show any significant differences in lipid profiles, but the changes in functional capacity were significant (P = 0.00) between the two groups, following the cardiac rehabilitation program.
The CRP, which was performed by the patients under supervision of a physician and an exercise physiologist, plays a key role in improving the functional capacity (FC) and all lipid profiles in non-obese males and females with coronary artery disease, without any attention to gender differences.
Cardiac rehabilitation program; coronary artery disease; gender; risk factor
Obesity is common in patients with cardiovascular disease (CVD) and the vast majority of patients entering into cardiac rehabilitation program (CRP) are obese. Regarding the gender differences, the risk of developing coronary heart disease (CHD) is recognized to be different between obese men and women. So, the purpose of this study was to explore the effect of CRP in functional capacity (FC) and risk factors, such as obesity indexes, lipid profiles, and fasting blood sugar (FBS) in obese men and women with CHD.
Marterials and Methods:
In an observational study between 2000 and 2011, we evaluated a total of 156 obese men and women patients with CHD who were referred to cardiac rehabilitation of Isfahan Cardiovascular Research Institute. Before and after CRP, FC and risk factors were assessed and all the participants completed this period. Data were analyzed with SPSS software version 15. For comparing the mean of outcomes, independent t tests and paired sample t tests were used.
Data revealed, after CRP, obese women had significant improvement in most evaluated risk factors except total cholesterol (P = 0.05) and FBS (P = 0.09); and obese men had favorable changes in weight (P = 0.00) and body mass index (P = 0.00), FC (P = 0.00) and total cholesterol (P = 0.02); in spite of no significant differences in other lipid profiles. Comparing the 2 groups did not show any significant differences unless high-density lipoprotein cholesterol (P = 0.01) and low-density lipoprotein cholesterol/high-density lipoprotein cholesterol ratio (P = 0.02) had greater improvement in obese women.
We concluded that CRP is an important step initiating the process of risk reduction and restoration of FC in obese men and obese women with CHD under attendance and supervision of physician, nurse, and exercise physiologist.
Cardiac rehabilitation program; coronary heart disease; gender; obesity; risk factor
Lack of heart rate increase proportionate to exercise causes poor prognosis. Moreover, inflammatory factors such as C-reactive protein (CRP) are associated with atherosclerosis. The current study compared these two indices in individuals with and without metabolic syndrome in Isfahan, Iran.
This study was performed on 203 people without and 123 patients with metabolic syndrome who were randomly selected from the participants of the Isfahan Cohort Study. The demographic data, waist circumference, blood pressure, height, and weight of the participants were recorded. Moreover, serum tr`viglyceride (TG), fasting blood sugar (FBS), total cholesterol, high density lipoprotein (HDL), low density lipoprotein (LDL), and high-sensitivity CRP (hs-CRP) levels were measured. Exercise test was carried out according to the Bruce standard protocol and heart rate reserve (HRR) was determined and recorded. The age-adjusted data was analyzed using generalized linear regression and student's t-test in SPSS15.
The mean ages of participants without and with metabolic syndrome were 54.16 ± 8.61 and 54.29 ± 7.6 years, respectively. The corresponding values for mean LDL levels were 116.17 ± 24.04 and 120.12 ± 29.55 mg/dl. TG levels were 140.38 ± 61.65 and 259.99 ± 184.49 mg/dl for subjects without and with the metabolic syndrome, respectively. The mean FBS levels were 81.81 ± 9.90 mg/dl in the participants without the syndrome and 107.13 ± 48.46 mg/dl in those with metabolic syndrome. The mean systolic blood pressure was 116.06 ± 13.69 mmHg in persons without metabolic syndrome and 130.73 ± 15.15 mmHg in patients with the syndrome. The values for mean diastolic levels in the two groups were 76.52 ± 6.69 and 82.84 ± 8.7 mmHg, respectively. While the two groups were not significantly different in terms of HRR (P = 0.27), hs-CRP levels in the metabolic syndrome group was significantly higher than the other group (P = 0.02).
We failed to establish a relationship between HRR and the metabolic syndrome. However, the observed relationship between metabolic syndrome and hs-CRP level, which is an inflammatory factor, indicates elevated levels of hs-CRP in patients with metabolic syndrome.
Metabolic Syndrome; Exercise Test; Heart Rate Reserve; High-Sensitivity C-Reactive Protein