The Thoracic and cardiovascular surgeon
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Thorac Cardiovasc Surg · Dec 1981
Surgical aspects of typical subaortic and atypical midventricular hypertrophic obstructive cardiomyopathy (HOCM).
Hypertrophic obstructive cardiomyopathy (HOCM) is a special form of left ventricular outflow tract obstruction. Clinical experience demonstrates 2 different types of HOCM of the left ventricle: the typical subaortic or subvalvular HOCM and the atypical midventricular form of myocardial obstruction. In a series of 108 patients operated upon, 96 had typical and 12 had atypical HOCM. ⋯ Postoperative cardiological follow-up indicates the superior effect of surgery as compared to drug therapy. The late mortality for the medical group was 10% and for the postoperative group 2.5%. These facts support our recommendation for the surgical treatment of HOCM in symptomatic patients in clinical stages III and IV (NYHA).