Why the study?
Which noninvasive markers predict arrhythmia risk in patients with idiopathic dilated cardiomyopathy?
Which noninvasive markers predict arrhythmia risk in patients with idiopathic dilated cardiomyopathy?
In idiopathic dilated cardiomyopathy, simple clinical markers (LVEF, beta-blocker use) predict arrhythmia risk better than complex noninvasive ECG parameters.
LVEF and beta-blocker status may inform arrhythmia risk in idiopathic dilated cardiomyopathy; leaves open utility of advanced ECG markers pending validation.
Reduced LV ejection fraction and lack of beta-blocker use are important arrhythmia risk predictors in IDC, whereas signal-averaged ECG, baroreflex sensitivity, heart rate variability, and T-wave alternans do not seem to be helpful for arrhythmia risk stratification. These findings have important implications for the design of future studies evaluating prophylactic implantable cardioverter-defibrillator therapy in IDC.
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Grimm et al. (2003) studied this question.
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