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 ORIGINAL ARTICLE
Year : 2009  |  Volume : 63  |  Issue : 7  |  Page : 288-296

Epidemiology and genetics of dilated cardiomyopathy in the Indian context


1 Department of Genetics, Osmania University, Hyderabad, Andhra Pradesh, India
2 Department of Genetics, KIMS Hospitals, Hyderabad, Andhra Pradesh, India
3 Department of Genetics, CARE Hospitals, Hyderabad, Andhra Pradesh, India

Correspondence Address:
Pratibha Nallari
Department of Genetics, Osmania University, Hyderabad - 500 007
India
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DOI: 10.4103/0019-5359.55114

PMID: 19700909

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Background: Dilated cardiomyopathy (DCM) still remains to be a poorly understood and less analyzed group of cardiac-muscle disorders when compared to hypertrophic cardiomyopathy (HCM). Also, the vast clinical heterogeneity among the patients has rendered the small and isolated kindred studies less informative on the genetics and epidemiology of DCM. Aim of the study: The study aimed at understanding the epidemiology and genetics of DCMs in the Indian context. Materials and methods/ Statistical analysis: One hundred seven DCM patients and 105 healthy individuals were included in the study for epidemiological and genetic risk factor identification and to fit the possible mode of inheritance. Single's ascertainment methodology for segregation analysis and Penrose frequency estimates were followed to evaluate for the role of specific epidemiological factors in the disease etiology. Chi-square analysis was carried out to interpret the results statistically. Results and Conclusion: Our study suggests that epidemiological factors like gender, age at onset and vegetarian diet in conjunction with sarcomere gene mutations may play a role in the disease expression. Similarly, segregation analysis for the possible mode of inheritance showed a deviation from the autosomal dominant mode of inheritance, strengthening the underlying genetic heterogeneity of DCM.






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