Characteristics and Prognostic Relevance of Ventricular Arrhythmia in Patients with Myocarditis

Overview

Journal J Cardiovasc Dev Dis

Specialty Cardiology & Vascular Diseases

Date 2022 Aug 25

PMID 36005407

Authors

Ann-Kathrin Kahle

Rebekka Gude

Jana M Schwarzl

Paula Munkler

Ruken O Akbulak

Charlotte Jahnke

Sebastian Bohnen

Tilman Wurger

Michael Schwarzl

Stephan Willems

Ulf K Radunski

Christian Meyer

Affiliations

Soon will be listed here.

Abstract

Myocarditis is characterized by various clinical manifestations, with ventricular arrhythmia (VA) as a frequent symptom at initial presentation. Here, we investigated characteristics and prognostic relevance of VA in patients with myocarditis. The study population consisted of 76 patients with myocarditis, verified by biopsy and/or cardiac magnetic resonance (CMR) imaging, including 38 consecutive patients with VA (45 ± 3 years, 68% male) vs. 38 patients without VA (NVA) (38 ± 2 years, 84% male) serving as a control group. VA was monomorphic ventricular tachycardia in 55% of patients, premature ventricular complexes in 50% and ventricular fibrillation in 29%. The left ventricular ejection fraction at baseline was 47 ± 2% vs. 40 ± 3% in VA vs. NVA patients (p = 0.069). CMR showed late gadolinium enhancement more often in VA patients (94% vs. 69%; p = 0.016), incorporating 17.6 ± 1.8% vs. 8.2 ± 1.3% of myocardial mass (p < 0.001). Radiofrequency catheter ablation for VA was initially performed in nine (24%) patients, of whom five remained free from any recurrence over 24 ± 3 months. Taken together, in patients with myocarditis, reduced left ventricular ejection fraction does not predict VA occurrence but CMR shows late gadolinium enhancement more frequently and to a larger extent in VA than in NVA patients, potentially guiding catheter ablation as a reasonable treatment of VA in this population.

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