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Epidemiology and genetics of dilated cardiomyopathy in the Indian context

B Ushasree1, V Shivani, A Venkateshwari

  • 1Department of Genetics, Osmania University, Andhra Pradesh, India.

Indian Journal of Medical Sciences
|August 25, 2009
PubMed

Insights

Dilated cardiomyopathy (DCM) genetics and epidemiology in India reveal that factors like diet and age, alongside sarcomere gene mutations, influence disease expression. Genetic analysis indicates a complex inheritance pattern beyond simple autosomal dominance.

Area of Science:

  • Cardiology
  • Genetics
  • Epidemiology

Background:

  • Dilated cardiomyopathy (DCM) is less understood than hypertrophic cardiomyopathy (HCM).
  • Clinical heterogeneity complicates genetic and epidemiological studies of DCM.
  • Limited research exists on DCM in the Indian population.

Purpose of the Study:

  • To investigate the epidemiology and genetics of DCM in India.
  • To identify epidemiological and genetic risk factors for DCM.
  • To determine the mode of inheritance for DCM in the study cohort.

Main Methods:

  • Study included 107 DCM patients and 105 healthy controls.
  • Epidemiological and genetic risk factors were assessed.
  • Segregation analysis (Single's methodology) and Penrose frequency estimates were used.
  • Chi-square analysis was applied for statistical interpretation.

Main Results:

  • Epidemiological factors such as gender, age at onset, and vegetarian diet were associated with DCM.
  • Sarcomere gene mutations were implicated in disease expression.
  • Segregation analysis deviated from an autosomal dominant inheritance pattern.

Conclusions:

  • DCM in India appears influenced by a combination of environmental/lifestyle factors and genetic mutations.
  • The findings support significant genetic heterogeneity in DCM.
  • Further research is needed to elucidate the complex etiology of DCM.
Abstract

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