الفهرس 
Anatomy Of The Mitral ValveOnly 14 pages are availabe for public view
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Abstract
RHD is one of the most common forms of cardiac diseases worldwide, particularly in developing countries, where it remains the second most common cause of cardiovascular morbidity and mortality after atherosclerotic vascular disease.
MS is the most common valve lesion seen in chronic RHD, MS does not produce any significant hemodynamic load on the LV, and therefore, LV systolic dysfunction is believed to be an exceedingly uncommon occurrence in patients with MS.
However, a few studies have reported that LV systolic dysfunction may not be uncommon in patients with rheumatic MS and may indeed contribute to the development of symptoms in these patients.
Systolic dysfunction of the right ventricle is well documented in patients with rheumatic mitral stenosis. Right ventricular dysfunction is usually overlooked before the emergence of clinical signs of systemic venous congestion because of difficulties in the quantitative assessment of right ventricular function.
Measuring myocardial performance has a critical importance in diagnosis and treatment of patients with cardiac diseases. The researches for the most appropriate method to measure contractile characteristics of myocardium are still carrying on. Nowadays, a novel method, two dimensional strain and strain rate imaging, has been developed for the quantitative assessment of global and regional myocardial function.
The current study included 32 patients who were subjected to proper history taking, clinical examination, 2D echocardiographic assessment, two dimensional strain and strain rate imaging and BMV and 30 control subjects.
The study revealed significantly reduced global longitudinal LV and RV strain in patients with MS compared to controls, the impaired global longitudinal LV and RV strain measurements were significantly inversely correlating with all parameters of assessment of severity of MV stenosis and BMV results in marked improvement in subclinical LV and RV systolic dysfunction.
Two-dimensional strain and strain rate imaging is an important breakthrough in the assessment of LV and RV functions.