ASSESSMENT OF COMMISSURAL MORPHOLOGY BY 2-DIMENSIONALAND 3- DIMENSIONAL ECHOCARDIOGRAPHY TO PREDICT THE IMMEDIATE OUTCOME OF PERCUTANEOUS TRANSVENOUS MITRAL COMMISSUROTOMY IN PATIENTS WITH RHEUMATIC MITRAL STENOSIS

Abstract

OBJECTIVE To find various commissural morphologic predictors of immediate outcome of percutaneous transvenous mitral commissurotomy by two and three dimensional echocardiography. METHODS Design: Cross sectional study Setting: Teratiry care hospital Participants: Symptomatic patients with severe rheumatic mitral stenosis aged more than 12 years without any contraindications for the procedure. Intervention: 2D and 3D echocardiographic evaluation of commissural morphology was done by measuring commissural thickness score, commissural fusion score, commissural calcification and intercommissural distance. End point: Predictors of successful procedure. RESULTS Sixty-five patients were screened. Ten were excluded because of (commissural calcification 5, > moderate mitral regurgitation 2, thrombus in left atrium 2 and emergency procedure in a pregnant lady 1). Fifty five patients (29 (53%) men and 26 (47%) women), mean age 30.58 ± 9.27 were studied. The procedure was successful in 47 (86%) patients. The following parameters predicted the success; lower commissural fusion score by 3D echo 1.5 (0.5 – 2.0) vs. 2.0 (0.5 -2.0); p ≤ 0.002, higher intercommissural distance by 2D echo 19.0 (12.5 – 21.5) vs. 16.5 (12.0 – 18.5); p ≤ 0.009, lesser commissural thickness score 3D echo 5.0 (0.4 – 10.2) vs. 8.8 (3.9 – 10.0); p ≤ 0.028 as well as by 2D echo 5.1 (1.7 - 9.8) vs 8.5 (4.3 - 9.7); p < 0.037. Commissural thickness score by 2D echo was the best predictor of outcome (r=0.509, P<0.0001). CONCLUSIONS Comissural morphology is an important independent predictor of immediate outcome of percutaneous transvenous mitral commissurotomy.