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1.  Relation between time to pregnancy and pregnancy outcome 
Studies have shown significant correlation between time to pregnancy (TTP) and pregnancy outcomes. But understanding of these mechanisms may not be facilitated. The aim of this study was to determine the relation between TTP and pregnancy outcome.
Materials and Methods:
This study was a case cohort study that was done in Shahid Beheshti Educational Hospital during 2006-2007. Women aged 18-35 years, who had only one pregnancy without using any contraception method before pregnancy and delivered their first child, were enrolled in this study. Thus, 801 women were selected and followed up for pregnancy outcome and TTP until the end of pregnancy. All the participants filled in a special questionnaire. Finally the collected data were entered into computer and analyzed by SPSS ver. 20 software.
The frequency distribution of TTP-based pregnancy outcome showed that TTP >48 weeks was higher in normal delivery than in abnormal delivery (5.6% vs. 19.4%). According to Chi-square test, the frequency distribution of pregnancy outcome was related to TTP (P < 0.001).
According to the results of this study, there is a significant relationship between TTP and pregnancy outcome, and TTP may lead to unwanted complications such as ectopic pregnancy, preterm labor, and abortion. Thus, all women with a long time of contraception, especially in the rural areas, mast be controlled.
PMCID: PMC4166062  PMID: 25250289
Contraception; pregnancy outcome; time to pregnancy
2.  Heart rate recovery in exercise test in diabetic patients with and without microalbuminuria 
ARYA Atherosclerosis  2013;9(3):167-171.
Diabetes mellitus (DM) has a lot of complications such as macrovessel and microvessel disease. Another complication of DM is cardiac autonomic neuropathy (CAN), which have effect on automatic nervous system of heart. Failure in heart rate slowing after exercise is a presentation of this abnormality.
We selected diabetic patients and divided them to case and control group based on microalbuminuria. Case group comprised of diabetic patients with microalbuminuria and control group included those without microalbuminuria. Patients in both groups exercised on treadmill using Bruce protocol and heart rate was measured in first and second minutes in the recovery period.
We selected 35 patients with microalbuminuria (case group) and 35 without microalbuminuria (control group) among diabetic patients. No statistically significant difference was seen in sex and age between case and control groups. Heart rate recovery in the first minute of recovery in the case and control groups did not show significant difference; but in the second minute of recovery, it was significantly higher in control group (97 ± 19.4 vs. 101.9 ± 12.4 beat per minute, P = 0.04).
In this study we evaluated the heart rate recovery or deceleration in diabetic patients with albuminuria and without microalbuminuria in recovery phase after exercise test. We found out that heart rate recovery at the second minute in the case and control groups has statistically significant difference but at the first minute, it did not.
PMCID: PMC3681282  PMID: 23766772
Diabetes Mellitus; Exercise Test; Heart Rate Recovery
3.  Hypercapnic hyperventilation shortens emergence time from Propofol and Isoflurane anesthesia 
The aim of this study is to compare the effects of hypercapnic hyperventilation and normocapnic normoventilation on emergence time from propofol and isoflurane anesthesia.
In this clinical trial, the differences in emergence time were evaluated in 80 patients undergoing elective abdominal surgery in Alzahra University hospital, Isfahan, Iran, in 2011-2012. Patients were randomly divided into four groups (groups 1-4) receiving isoflurane hypercapnic hyperventilation, isoflurane normocapnic normoventilation, propofol hypercapnic hyperventilation, and propofol normocapnic normoventilation, respectively. Hypercapnia was maintained by adding CO2 to the patient's inspired gas during hyperventilation. The emergence time and the duration of stay in recovery room in the four groups were measured and compared by one-way analysis of variance (ANOVA) and least significant difference tests.
The average emergence time in groups 1, 2, 3, and 4 were (11.3 ± 3.2), (15.2 ± 3.8), (9 ± 4.2) and (11.8 ± 5.3) min, respectively. These differences were significant (P = 0.001). In patients receiving propofol hypercapnic hyperventilation, the emergence time was faster than in other groups. There was also a significant difference in duration of stay in recovery room between the groups (P = 0.004). Patients who received isoflurane hypercapnic hyperventilation had a shortest length of stay in the recovery room.
The emergence time after intravenous anesthesia with propofol can be shortened significantly by using hyperventilation and hypercapnia, without any side effects.
PMCID: PMC4076894  PMID: 24991600
Emergence; hypercapnia; hyperventilation; isoflurane; propofol
4.  The role of ultrasonography in primary congenital hypothyroidism 
The aim of this study was to compare the usefulness of ultrasonography and scintigraphy in diagnosing the etiology of primary congenital hypothyroidism (CH).
The newborns that were examined by both thyroid scintigraphy and ultrasonography during CH screening program in Isfahan were included in this study. The ultrasonographic findings were compared with the scintigraphic findings and the sensitivity and specificity of the ultrasonography was determined.
During this study, 102 CH newborns were studied. According to the ultrasonographic results, 61.8%, 26.5%, 2.9% and 8.8% of them had normal thyroid gland, agenesia, ectopia and hypoplasia, respectively, and according to scintigraphic results, 55.9%, 35.3% and 8.8% of them had normal thyroid gland, agenesia and ectopia, respectively. Ultrasound detected sensitivity, specificity, positive predictive value, negative predictive value, and positive and negative likelihood ratio were 77%, 92%, 89%, 84%, 9.6 and 0.25, respectively. The sensitivity and specificity of ultrasonography compared with thyroid scintigraphy in diagnosis of thyroid gland ectopia was 33% and 100%, respectively.
Though thyroid ultrasonography failed to diagnose 67% of ectopic cases and nonfunctioning thyroid gland, it had the ability to determine the anatomy of thyroid gland. So, considering some limitations of scintigraphy, we concluded that ultrasonography is a relatively appropriate imaging tool for diagnosing CH etiologies, especially in the initial phase of CH screening.
PMCID: PMC3430036  PMID: 22973380
Congenital Hypothyroidism; Etiology; Iran; Radioisotope Scanning; Ultrasonography

Results 1-4 (4)