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  • Erica S. Zado
    Correspondence
    Address reprint requests and correspondence: Ms Erica S. Zado, Section of Cardiac Electrophysiology, Cardiovascular Division, Hospital of the University of Pennsylvania, 3400 Spruce St, 9 Founders, Philadelphia, PA 19104.
    Affiliations
    Section of Cardiac Electrophysiology, Cardiovascular Division, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
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Published:February 09, 2021DOI:https://doi.org/10.1016/j.hrthm.2021.02.006
      Two articles have assessed the use of results from cardiac magnetic resonance (CMR) imaging in predicting arrhythmic events. The first by Klem et al (Circulation 2021, https://doi.org/10.1161/CIRCULATIONAHA.120.048477, PMID 33478245) used a large registry of patients with nonischemic cardiomyopathy (NICM) and left ventricular ejection fraction (LVEF) <50% who underwent CMR to investigate the relationship of scar on CMR and LVEF on mortality and mode of death. Magnetic resonance images were obtained utilizing the same protocol at each of 3 centers. Scar size was measured by a simple visual scoring method. Follow-up was done at least yearly, and cause of death was determined by review of available records, death certificates, and postmortem examination if done. Endpoints included all-cause death, cardiac death, and sudden cardiac death (SCD), defined as death within 1 hour of witnessed arrest or unwitnessed death in a patient known to be well within 24 hours of death. Patients were grouped according to LVEF (>35% and ≤35%) and the presence or absence of scar on CMR.
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