Nov 26, 2019

Sudden cardiac death in patients with myocarditis: Evaluation, risk stratification, and management

American Heart Journal
Fatima Ali-AhmedSana M Al-Khatib

Abstract

Myocarditis is a major cause of sudden cardiac death (SCD) and dilated cardiomyopathy (DCM) in young adults. Cardiac magnetic resonance is the established tool for the diagnosis of myocarditis, and late gadolinium enhancement detected on cardiac magnetic resonance imaging is the strongest independent predictor of SCD, all-cause mortality, and cardiac mortality. Several other factors have been associated with SCD or cardiac transplantation including New York Heart Association functional class III/IV, reduced left ventricular ejection fraction <35%, and right ventricular ejection fraction ≤45%. A fragmented QRS and a prolonged QTc interval on an electrocardiogram are predictors of VAs. The postulated mechanism of VA in acute myocarditis is ion channel dysfunction and inflammation that alter intracellular signaling, producing interstitial edema and fibrosis and thereby causing conduction abnormalities. VAs in chronic myocarditis are generally due to scar-mediated reentry. Treatment of myocarditis is tailored toward supportive care and symptomatic relief. The subset of patients who develop DCM should be treated with heart failure medications according to professional guideline recommendations. Indications for an implantable cardiov...Continue Reading

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Mentioned in this Paper

Supportive Care
Radiofrequency Ablation
Classification
Magnetic Resonance Imaging
Stratification
Recommendations or Guidelines
Anti-Arrhythmia Agents
Evaluation
Cardiomyopathies
Ion Channel

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