Strain Rate Imaging Evaluation Of Myocardial Systolic Function In Patients With Rheumatic Mitral Stenosis Before And After Valve Replacement

Objective To assess value of strain rate imaging (SRI) in evaluation ofmyocardial systolic function in patients with rheumatic mitral stenosis (RMS)before and after valve replacement and of prognosis of RMS patients aftervalve replacement.Methods Forty-two patients with RMS were divided into A and B groupsaccording to the recovery of the patients after operation: Group A (n =30) withfine recovery; Group B (n =12) with poor recovery. Twenty-six matched healthyindividuals were enrolled as control group. Area of MV orifice(MVOA), leftventricular ejection fraction(LVEF) and left ventricular fractionalshortening(FS)were measured with routine echocardiography before and afteroperation. The parameters of myocardial systolic movement were measured bySRI. The values of systolic strain rate (SRs) of basal and middle segments weremeasured in study groups with RMS before and one month after valvereplacement. SRs in preoperative period was compared with those in post–operative period.ResultResults The SRs of patients in two groups before operation were lower than thoseof control group (P<0.05), while the SRs of group B were lower than those ofgroup A. The SRs peak values of group A increased one month after operation,but did not change significangtly of group B. Conclusion SRI can evaluatemyocardial systolic function in patients with RMS before and after valvularreplacement, and might be used as one predictor of the prognosis of the RMSpatients after operation.