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Clinical characteristics of 304 kindreds evaluated for familial dilated cardiomyopathy

Jessica D Kushner1, Deirdre Nauman, Donna Burgess

  • 1Division of Cardiology, Department of Medicine, Oregon Health & Science University, Portland, Oregon 97239, USA.

Journal of Cardiac Failure
|August 17, 2006
PubMed

Insights

Familial dilated cardiomyopathy (FDC) and idiopathic dilated cardiomyopathy (IDC) share similar clinical features. Diagnosis of FDC cannot be solely based on clinical presentation, highlighting the need for genetic evaluation.

Area of Science:

  • Cardiology
  • Genetics
  • Internal Medicine

Background:

  • Familial dilated cardiomyopathy (FDC) is defined as dilated cardiomyopathy of unknown cause in closely related family members.
  • Distinguishing FDC from idiopathic dilated cardiomyopathy (IDC) is crucial for genetic counseling and family screening.

Purpose of the Study:

  • To evaluate clinical characteristics differentiating FDC from IDC.
  • To assess the diagnostic utility of clinical features in identifying FDC.

Main Methods:

  • Reviewed medical records and family histories of 304 families with suspected FDC.
  • Categorized pedigrees into confirmed FDC, probable FDC, possible FDC, and sporadic IDC.
  • Analyzed clinical features, disease progression, and outcomes across categories.

Main Results:

  • Clinical features, age of onset, and disease duration were similar across confirmed FDC, probable FDC, possible FDC, and IDC categories.
  • Left ventricular dimensions increased and function worsened along the spectrum from confirmed FDC to IDC.
  • A higher proportion of IDC patients required heart transplantation.

Conclusions:

  • Clinical presentation alone is insufficient to diagnose FDC.
  • Similarities between FDC and IDC underscore the importance of genetic assessment in suspected familial cases.
Abstract

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