Nonischemic dilated cardiomyopathy is a heterogeneous disease often associated with increased rates of sudden cardiac death. Although many algorithms have been proposed, risk stratification remains suboptimal, and implantable cardioverter-defibrillators are currently recommended only in patients with poor left ventricular function. However, most cases of sudden cardiac death occur at earlier stages, in patients with relatively preserved left ventricular function and exercise capacity, for which device-therapy is currently not indicated. Several noninvasive risk factors have been associated with increased arrhythmic risk, including clinical history (syncope), imaging (fibrosis on cardiac magnetic resonance imaging and left ventricular dimensions in echocardiography) and electrocardiographic parameters (ventricular arrhythmic burden, late potentials, heart rate variability and repolarization abnormalities). The investigators hypothesized that the encouraging findings of studies assessing more sophisticated stratification-algorithms in patients with ischemic heart disease could be extrapolated in patients with nonischemic dilated cardiomyopathy. Thus, combining noninvasive risk factors with programmed ventricular stimulation may risk-stratify such patients more accurately. In this regard, the prospective observational multicenter ReCONSIDER study aims to integrate several approaches to arrhythmic risk stratification in nonischemic dilated cardiomyopathy in a tiered, multifactorial, approach, in which noninvasive risk factors are combined with electrophysiologic studies. This approach may pave the way for a more comprehensive risk stratification algorithm in patients with nonischemic dilated cardiomyopathy, leading to more rational device-therapy, and, ultimately to lower mortality.
Age range
18 Years – 80 Years
Sex
ALL
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Major arrhythmic event (MAE) occurrence (ICD activation ± sudden cardiac death ± sustained ventricular tachycardia/ventricular fibrillation)
Timeframe: 48 months (total follow up duration)