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      Equivocal and Borderline Myocardial Hypertrophy in Relatives of Patients with Hypertrophic Cardiomyopathy: Possible Implications in Genetics of the Disease

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          Abstract

          To determine the occurrence of familial and sporadic forms of hypertrophic cardiomyopathy (HC) 74 first-degree relatives of 21 patients with proven HC were studied by M-mode and two-dimensional echocardiography. A diagnosis of HC was made in 11 relatives (15%) while it was excluded in 61 of them (82%); 2 subjects (3%) were considered neither affected nor unaffected (borderline left ventricular hypertrophy suggestive of HC). Inspection of pedigrees revealed 38% of familial forms of HC with an autosomal dominant pattern of inheritance in 5/8 families (62%). Furthermore, among those relatives judged unaffected by means of full echocardiographic criteria for HC, an attempt was made to find out whether minor changes of left ventricular geometry were present for their possible implications in genetics of HC (latent or potential forms, low phenotypic expression of the disease). Eleven out of 61 unaffected relatives had a left ventricular wall thickness radius ratio > .50 (equivocal hypertrophy), a value that was higher than two standard deviations of the control group. Assessment of clinical significance of borderline and equivocal hypertrophy in relatives of patients with HC is required for a better understanding of genetic transmission of this disease. In this view the occurrence of sporadic and familial forms of HC might be revisited.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          0008-6312
          1421-9751
          1988
          1988
          11 November 2008
          : 75
          : 5
          : 348-356
          Affiliations
          Dipartimento di Medicina Interna, II Università degli Studi di Roma, Italia
          Article
          174398 Cardiology 1988;75:348–356
          10.1159/000174398
          3233616
          © 1988 S. Karger AG, Basel

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          Page count
          Pages: 9
          Categories
          Original Paper

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