Echocardiographic findings late after myectomy in hypertrophic obstructive cardiomyopathy
TURINA, J. ; JENNI, R. ; KRAYENBUEHL, H.P. ; TURINA, M. ; ROTHLIN, M.
In: European Heart Journal, 1986, vol. 7, no. 8, p. 685-692
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- Postoperative echocardiograms of 50 patients undergoing myectomy for hypertrophic obstructive cardiomyopathy between 1965 and 1982 have been evaluated. In 21 patients a comparison with preoperative echocardiograms showed that postoperatively there was a significant reduction of septal and free wall thickness, an increase of left ventricular end-diastolic as well as outflow tract dimensions and a reduction or disappearance of systolic anterior motion of the mitral leaflet. Postoperative examination at intervals > 3 years revealed a significant increase of left ventricular and left atrial cavity size with unchanged contractile parameters and little reduction of left ventricular hypertrophy. In 4of 12 patients evaluated > 8 years after myectomy, left ventricular dilatation was observed and 3 of these 4 patients developed congestive heart failure. Development of leftventricular dilatation was independent of whether a transventricular and/or transaortic approach was used for myectomy. These data indicate that the late course after myectomy in hypertrophic obstructive cardiomyopathy may be complicated by dilatation of the left ventricular cavity