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  • Title: [Clinical aspects, course and prognosis of various forms of hypertrophic cardiomyopathy].
    Author: Kuhn H, Gietzen F, Mercier J, Lösse B, Köhler E, Schulte HD, Bircks W, Loogen F.
    Journal: Z Kardiol; 1983 Feb; 72(2):83-98. PubMed ID: 6221476.
    Abstract:
    To characterize the different types of hypertrophic cardiomyopathy [typical (subaortic) hypertrophic obstructive cardiomyopathy (HOCM) (n = 235), atypical (midventricular or apical) HOCM (n = 33), and hypertrophic nonobstructive cardiomyopathy (HNCM) (n = 85)], studies of the clinical picture, course, and prognosis were performed in 353 patients. Clinical picture. There were found to be distinct differences between the diseases in terms of incidence, symptoms, findings at auscultation, carotid pulse tracings, ECG (incidence of abnormal negative T-waves), and echocardiography. Echochardiography proved to be diagnostically less specific than invasive methods, however, and in particular often failed to distinguish between atypical HOCM and HNCM. Clinical course. There was no evidence of a change from one form of hypertrophic cardiomyopathy to the other. The Sokolow-Lyon index in the ECG did not increase in any group. The rate of complications (endocarditis, systemic emboli) varied between 0.61 and 1.28 events per 100 patient years. Only 7.4%-23.5% of patients with HOCM improved as a result of conservative treatment, compared to 83%-87.5% of surgical patients. In addition, the rate of postoperative syncope was reduced by 90%. Prognosis. 90 patients were operated on. Operative mortality in typical HOCM was 4.5% over the last 5 years. If this is disregarded, the cumulative survival rates are significantly higher in surgical patients with typical HOCM than in those treated conservatively. The data confirm surgical treatment to be the therapy of choice in patients with HOCM refractory to conservative treatment. The prognosis seems to be improved by operation.
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