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Repolarization Abnormality for Prediction of All‐Cause and Cardiovascular Mortality in American Indians: The Strong Heart Study

Background: Analysis of electrocardiographic (ECG) repolarization abnormality using QTc interval and principal component analysis (PCA) of the T‐wave vector predict all‐cause and cardiovascular (CV) mortality. Novel descriptors of T‐wave morphology have been suggested as measures of repolarization heterogeneity and adverse prognosis. However, whether these T‐wave descriptors provide prognostic information beyond QTc and the PCA ratio has not been examined.