الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Mitral stenosis (MS) is the most frequent valvular complication of rheumatic fever. Even in industrialized countries, most cases are of rheumatic origin as other causes are rare. Given the decrease in the prevalence of rheumatic heart diseases, MS has become the least frequent single left-sided valve disease. However, it still accounts for 10% of left-sided valve diseases in Europe and it remains frequent in developing countries.
Right ventricular (RV) function plays an important role in development of clinical symptoms and prognosis in patients with mitral stenosis (MS). This is primarily affected by hemodynamic effects on RV due to pulmonary hypertension. RV dysfunction is not detected clinically until the development of clinical signs of systemic venous congestion.
RV functional assessment is difficult and not done routinely because of its complex anatomy and high load dependence. Many indices have been developed for quantifying RV function, among which strain and strain rate is relatively new. Myocardial strain is a measure of tissue deformation, which is expressed as a percentage change, whereas, strain rate is the rate of such deformation.
In this study, 30 adult patients with isolated severe MS with a mean age about 39.23 years where 80% of them were females. RV function was assessed as quantified by tissue doppler regional RV strain, strain rate and other conventional parameters before and 2 times after PBMV (1st and 3rd months).
Results showed that there was no a statistically significant difference between the strain values at pre PBMV and post PBMV (p=0.967) or strain rate values (p=0.407).