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Epidemiology of Idiopathic Dilated Cardiomyopathy (Washington, DC Dilated Cardiomyopathy Study)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00005262
Recruitment Status : Completed
First Posted : May 26, 2000
Last Update Posted : May 13, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Brief Summary:
To identify risk factors for idiopathic dilated cardiomyopathy and to examine prognostic factors over a follow-up period of two to three years.

Condition or disease
Cardiovascular Diseases Heart Diseases Myocardial Diseases Asthma Diabetes Mellitus Hypertension

Detailed Description:


Idiopathic dilated cardiomyopathy is an often fatal cause of heart failure in young adults which is characterized by dilatation of the ventricles, increased myocardial mass, and impairment of systolic function. Dilated cardiomyopathy is more common than hypertrophic and restrictive cardiomyopathy, and the symptoms and physical signs are those of left-sided and eventually right-sided heart failure. Histologic findings in the condition include nonspecific interstitial myocardial fibrosis and myocyte hypertrophy. Despite the large number of systemic or generalized disease processes which have been associated with secondary dilated cardiomyopathy, the majority of cases are idiopathic. Mortality rates from cardiomyopathy have increased dramatically since 1970, and in 1990 over 10,000 deaths annually were attributed to cardiomyopathy in the United States.


The study had a prospective case-control design. Medical records of possible cases of idiopathic dilated cardiomyopathy who were discharged from five Washington, D. C. acute care hospitals over a two year period were abstracted so that standard diagnostic criteria could be applied. Two neighborhood controls were identified for each case. Cases and controls were matched on five year age intervals, sex, and telephone exchange. Cases were contacted annually during the two to three year follow-up period to determine vital status. The study determined whether the reported association between idiopathic dilated cardiomyopathy and asthma could be confirmed and the possible role of asthma medications, cigarette smoking, moderate alcohol consumption, and diabetes mellitus in the etiology of idiopathic dilated cardiomyopathy. The role of hypertension was also studied.. Statistical analysis consisted of case-control comparisons using conditional logistic regression techniques, and survival analyses using Kaplan-Meier curves and proportional hazards models.

The study was also known as the Washington, D.C. Dilated Cardiomyopathy Study. Dr. Coughlin started his research at Georgetown University in Washington, D.C. and transferred to Tulane University.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

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Study Type : Observational
Study Start Date : July 1990
Actual Study Completion Date : June 1996

Information from the National Library of Medicine

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Ages Eligible for Study:   up to 100 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
No eligibility criteria


Layout table for additonal information Identifier: NCT00005262    
Other Study ID Numbers: 1146
R29HL044904 ( U.S. NIH Grant/Contract )
First Posted: May 26, 2000    Key Record Dates
Last Update Posted: May 13, 2016
Last Verified: May 2000
Additional relevant MeSH terms:
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Heart Diseases
Cardiovascular Diseases