الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Atrial fibrillation is the most common type of arrhythmic disease in clinical practice and one of the main causes of admission to hospitals related to morbidity and mortality. Studies had shown that the most common cause of atrial fibrillation is ischemic heart disease. chronic atrial fibrillation has an important clinical burden. It is an independent predictor of mortality, and is related to an odds ratio for death of 1.5 for men and 1.9 in women, independent of other risk factors. Right heart is difficult to be accessed by echocardiography because of its anatomical structure is complex. Evaluation of right ventricular dimensions and functions has an important clinical role in cardiac and chest diseases. The most common way used for the evaluation of right ventricular systolic function is qualitative assessment (eye ball) method but it should be used with other measures which include different views to check right ventricular contractility as fractional area change, tricuspid annular plane systolic excursion, Tissue Doppler-derived right ventricular systolic excursion velocity, Myocardial acceleration during isovolumic contraction and Speckle tracking – strain and strain rate. The aim of this study was to evaluate right ventricular systolic and diastolic functions in patients with chronic non valvular atrial fibrillation by echocardiography using Tissue Doppler and 2D Speckle tracking. A case-control study was performed on fifty (50) patients with chronic atrial fibrillation and twenty (20) matched control without atrial fibrillation were enrolled in the study. The patient group includes Fifty (50) patients with chronic atrial fibrillation and control group includes Twenty (20) with no atrial fibrillation. They were chosen from cardiology department at Faculty of medicine (Tanta University). All patients were subjected to full history taking, clinical examinations Including vital signs (blood pressure, heart rate) Electrocardiogram (ECG), Echocardiography including M-mode, fractional area change, tricuspid annular plane systolic excursion, Tissue Doppler-derived right ventricular systolic excursion velocity, Myocardial acceleration during isovolumic contraction and speckle tracking (2D Strain and strain rate) were done for both patients and control groups.