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Surface Electrocardiography and Histologic Rejection Following Orthotopic Heart Transplantation *

Background: Intraventricular conduction delay and QT interval dispersion may be related to electrical instability and the risk of ventricular arrhythmogenesis. The interlead variability of the QT interval on a surface 12‐lead electrocardiogram (ECG) has been associated with an increased likelihood of sudden death in patients with long QT syndromes, in patients recovering from myocardial infarction, and dilated cardiomyopathy. We sought to determine the incidence of increased QTc dispersion (QTc‐d) relative to biopsy grade of severity of rejection.