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1.  Association of serum potassium level with ventricular tachycardia after acute myocardial infarction 
ARYA Atherosclerosis  2012;8(2):79-81.
BACKGROUND
One of the causes of mortality in acute myocardial infarction (AMI) is ventricular tachycardia. Abnormal serum Potassium (K) level is one of the probable causes of ventricular tachycardia in patients with AMI. This study carried out to determine the relationship between serum potassium level and frequency of ventricular tachycardia in early stages of AMI.
METHODS
Ina cross-sectional study on 162 patients with AMI in the coronary care unit (CCU) of Nour Hospital (Isfahan, Iran), the patients' serum potassium level was classified into three groups: 1) K<3.8 mEq/l, 2) 3.8≤K<4.5 mEq/l and 3) K≥4.5 mEq/l. The incidence of ventricular tachycardia in the first 24 hours after AMI was determined in each group by chi-square statistical method.
RESULTS
The frequency of ventricular tachycardia in the first 24 hours after AMI in K< 3.8 mEq/l, 3.8≤K<4.5 mEq/l and K≥4.5 mEq/l groups were 19.0%, 9.6% and 9.9% respectively. The high frequency of this arrhythmia in the first group as compared with the second and the third group was statistically significant.
CONCLUSION
Hypokalemia increased the probability of ventricular tachycardia in patients with AMI. Thus, the follow up and treatment of hypokalemia in these patients is of special importance.
PMCID: PMC3463994  PMID: 23056108
Acute Myocardial Infarction; Ventricular Tachycardia; Hypokalemia; SerumPotassium Level
2.  The association between epicardial fat thickness in echocardiography and coronary restenosis in drug eluting stents 
ARYA Atherosclerosis  2011;7(1):11-17.
BACKGROUND
The association between epicardial fat and coronary in-stent restenosis has not been evaluated. The objective of the present study was to evaluate the relationship of echocardiographic epicardial fat thickness (EFT) with restenosis in drug eluting stents (DES).
METHODS
In this study, 117 patients who underwent coronary angiography due to recurrent clinical symptoms or findings of non-invasive cardiac tests one year after stent implantation were selected. According to angiographic results, they were divided into two groups, 65 patients with in-stent restenosis (case group) and 52 patients without such finding (control group). EFT was measured perpendicularly on the free wall of the right ventricle at the end of systole in two echocardiographic views (parasternal short and long axis) at least in three cardiac cycles. The average of obtained values was determined and recorded as EFT. Furthermore, the history of hypertension, smoking and diabetes, age and sex were investigated and body mass index (BMI) of each patient was also calculated.
RESULTS
There were no significant differences in the baseline characteristics (P=0.812). Patients with in-stent restenosis did not have statistically significant difference (4.6±1.8 mm) in EFT compared to subjects with patent stents (4.5±1.8 mm; P=0.88). The above results were also confirmed using multiple linear regressions. No significant correlation was found between EFT and other clinical variables (P >0.05).
CONCLUSION
In this selected population, the risk of restenosis was not correlated with epicardial fat thickness. Future studies for determining the role of epicardial fat in development of in-stent restenosis are warranted.
PMCID: PMC3347840  PMID: 22577439
Epicardial Fat Thickness; Echocardiography; In-Stent Restenosis (ISR)

Results 1-2 (2)