Skip to Main Content

+

  • • 2 most common causes: dilated (idiopathic) and ischemic

    Idiopathic

    • -Unknown etiology

      -Often multifactorial resulting in large, dilated heart with poor ventricular function

    Ischemic

++

Epidemiology

+

  • • 60% of patients with NYHA Class IV disease will die within 1 year

    • Medical therapy for cardiomyopathy carries dismal prognosis

++

Symptoms and Signs

+

  • • Heart failure symptoms

++

Laboratory Findings

+

  • ECG: Q waves, widened QRS, conduction defects

++

Imaging Findings

+

  • Chest film: Pulmonary congestion, enlarged heart

+

  • • Echocardiography

    • Catheterization

++

Rule Out

+

  • • Other causes of heart failure

+

  • • Physical exam

    • ECG

    • Echocardiography

+

  • Idiopathic

    • -Cardiac transplantation may have best long-term results

      -Mitral valve annuloplasty if enlarged annular size from LV enlargement

      -Batista procedure: ventricular reduction; limited use

      -Biventricular pacing: Restores normal depolarization to ventricles, increasing ejection fraction significantly

    Ischemic

    • -Consider coronary artery bypass grafting (CABG) if suitable target vessels and evidence of "hibernating" mycoardium

++

Surgery

++

Indications

+

  • CABG: If suitable target vessels, hibernating myocardium on PET scan or stress thallium

    Idiopathic: Cardiac transplantation in suitable candidates

++

Prognosis

+

  • • Batista procedure: Limited survival, high mortality

    • Medical therapy carries dismal prognosis

    • See Cardiomyopathy, Ischemic.

++

References

Braile DM et al. Dynamic cardiomyoplasty: long-term clinical results in patients with dilated cardiomyopathy. Ann Thorac Surg. 2000;69:1445.  [PubMed: 10881820]
Bardy GH et al: Amiodarone or an implantable cardioverter-defibrillator for congestive heart failure. N Engl J Med 2005;352:225.  [PubMed: 15659722]
Cleland JG et al: The effect of cardiac resynchronization on morbidity and mortality in heart failure. N Engl J Med 2005;352:1539.  [PubMed: 15753115]
Dargie HJ: Effect of carvedilol on outcome after myocardial infarction in patients with left-ventricular dysfunction: The CAPRICORN randomised trial. Lancet 2001;357:1385.  [PubMed: 11356434]
Hunt SA et al: ACC/AHA 2005 guideline update for the diagnosis and management of chronic heart failure in the adult—summary article. Circulation 2005;112:1825.

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.