Obstructive sleep apnea and severity of coronary artery disease.

Background: It has been implicated that obstructive sleep apnea (OSA) is associated with increased risk of cardiovascular disease including stroke, myocardial infarction, coronary artery disease (CAD) and hypertension. The aim of this study was to investigate the correlation between OSA and severity of atherosclerosis assessed by angiography.

Methods: This study included 337 patients undergoing diagnostic coronary angiography at Tehran Heart Center, Iran.

Effect of exercise-based cardiac rehabilitation following coronary artery bypass surgery on ventricular repolarization indices.

Purpose: Indices of ventricular repolarization heterogeneity are associated with future arrhythmias and sudden cardiac death. We investigated the effect of exercise-based cardiac rehabilitation (CR) on these indices in a sample of Iranian patients.

Methods: Patients (N 122), who had undergone coronary artery bypass surgery (CABGS), were enrolled in this cohort study.

Role of fine-needle aspiration in the management of thyroid nodules.

Objective: To show the benefits of fine-needle aspiration biopsy (FNAB) in managing thyroid nodules.

Methods: As a retrospective study, reports of 888 FNABs of the thyroid performed during a period of 11 years (1996-2007) at Tehran University of Medical Sciences, Sina Hospital and Endocrine Clinic, Tehran, Iran were reviewed. Histological diagnoses were available for 182 cases, and we compared cytological diagnoses of FNAB with pathologic reports.