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Idiopathic Dilated Cardiomyopathy

Primary Purpose

Heart Diseases, Cardiomyopathy, Congestive

Status
Completed
Phase
Locations
Study Type
Observational
Intervention
Sponsored by
National Heart, Lung, and Blood Institute (NHLBI)
About
Eligibility
Locations
Outcomes
Full info

About this trial

This is an observational trial for Heart Diseases

Eligibility Criteria

undefined - 100 Years (Child, Adult, Older Adult)MaleDoes not accept healthy volunteers

No eligibility criteria

Sites / Locations

    Outcomes

    Primary Outcome Measures

    Secondary Outcome Measures

    Full Information

    First Posted
    May 25, 2000
    Last Updated
    May 12, 2016
    Sponsor
    National Heart, Lung, and Blood Institute (NHLBI)
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    1. Study Identification

    Unique Protocol Identification Number
    NCT00005201
    Brief Title
    Idiopathic Dilated Cardiomyopathy
    Study Type
    Observational

    2. Study Status

    Record Verification Date
    May 2000
    Overall Recruitment Status
    Completed
    Study Start Date
    July 1987 (undefined)
    Primary Completion Date
    undefined (undefined)
    Study Completion Date
    June 1992 (Actual)

    3. Sponsor/Collaborators

    Name of the Sponsor
    National Heart, Lung, and Blood Institute (NHLBI)

    4. Oversight

    5. Study Description

    Brief Summary
    To determine the familial occurrence and pathogenesis of idiopathic dilated cardiomyopathy.
    Detailed Description
    BACKGROUND: In 1987 idiopathic dilated cardiomyopathy was a disorder of unknown cause that directly affected one or both cardiac ventricles in a diffuse or multifactorial fashion, and that produced heart failure, at least in some patients. Although a viral etiology had been proposed, dilated cardiomyopathy could be associated with numerous genetic and non-genetic diseases. However in 1987, the role of genetic factors was not known in humans. Although the condition was usually dismissed as sporadic, numerous families with multiple affected members have been observed. The role of atrial natriuretic peptide levels in the pathogenesis or progression of idiopathic dilated cardiomyopathy was just beginning to be explored in 1987. Although Syrian hamster studies did not suggest a genetic deficiency as the primary cause of dilated cardiomyopathy in that model, it was thought possible that ANP production or levels were somehow involved in how the myocardium responds in idiopathic dilated cardiomyopathy patients. DESIGN NARRATIVE: Eligible patients were interviewed and asked whether any first-degree relatives were willing to participate. If family members participated, a three generation pedigree was constructed and first-degree relatives contacted. The relatives were interviewed for a medical history and medical records from other institutions were reviewed. Each family member had a brief cardiovascular examination, a 12-lead electrocardiogram and 2-dimensional, M-mode, and Doppler echocardiogram. Blood was drawn for determination of atrial natriuretic peptide (ANP) levels. The contributions of variability in age, sex, drug use, smoking, and other concomitants to variability in ANP and echocardiographic data were estimated. After removing these sources of variability, the strength of similarity among family members was assessed. The relative contributions of genes and shared environments to the similarity among family members were estimated. Heterogeneity in the mean levels of echocardiographic indices and ANP levels, familial aggregation and etiology of aggregation were assessed between families with familial idiopathic dilated cardiomyopathy and families with non-familial idiopathic dilated cardiomyopathy. The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

    6. Conditions and Keywords

    Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
    Heart Diseases, Cardiomyopathy, Congestive

    7. Study Design

    10. Eligibility

    Sex
    Male
    Maximum Age & Unit of Time
    100 Years
    Accepts Healthy Volunteers
    No
    Eligibility Criteria
    No eligibility criteria

    12. IPD Sharing Statement

    Citations:
    PubMed Identifier
    1727235
    Citation
    Michels VV, Moll PP, Miller FA, Tajik AJ, Chu JS, Driscoll DJ, Burnett JC, Rodeheffer RJ, Chesebro JH, Tazelaar HD. The frequency of familial dilated cardiomyopathy in a series of patients with idiopathic dilated cardiomyopathy. N Engl J Med. 1992 Jan 9;326(2):77-82. doi: 10.1056/NEJM199201093260201.
    Results Reference
    background
    PubMed Identifier
    8271845
    Citation
    Michels VV, Moll PP, Rodeheffer RJ, Miller FA Jr, Tajik AJ, Burnett JC Jr, Driscoll DJ, Thibodeau SN, Ansari AA, Herskowitz A. Circulating heart autoantibodies in familial as compared with nonfamilial idiopathic dilated cardiomyopathy. Mayo Clin Proc. 1994 Jan;69(1):24-7. doi: 10.1016/s0025-6196(12)61607-3.
    Results Reference
    background

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    Idiopathic Dilated Cardiomyopathy

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