In Hypertrophic Cardiomyopathy, the Spatial Peaks QRS‐T Angle Identifies Those With Sustained Ventricular Arrhythmias

摘要

ABSTRACT BackgroundThe spatial peaks QRS-T (SPQRS-T) angle differentiates hypertrophic cardiomyopathy (HCM) patients from controls. Increased angle confers arrhythmia risk in other populations. HypothesisWe predict that the SPQRS-T angle will identify HCM patients with sustained ventricular arrhythmias (VAs) and those with New York Heart Association class III/IV heart failure. MethodsCorrected QT interval, QRS duration, and SPQRS-T angle were assessed in HCM patients with VAs (>30?seconds) and those without VAs. ResultsOne hundred HCM patients (mean age, 32.7?±?17.2?years) were assessed. Twenty patients had VAs. The corrected QT interval identified VA ( P = 0.018) and at 460?ms gave positive and negative predictive values of 28.6% and 83.3%, respectively, and an odds ratio of 2.0 (95% confidence interval: 0.7-5.6). The SPQRS-T angle differentiated VA from no VA ( P ConclusionsThe SPQRS-T angle best differentiated patients with VAs.