The presence of DCM in MEPPC patients is also a risk factor for malignant ventricular arrhythmias in itself (12), which underscores the importance of proper treatment and genetic testing including the SCN5A gene should be considered in young patients with a high PVC burden of multifocal origin and/or left bundle branch block morphologies. Here, SCN5A is linked to familial dilated cardiomyopathy.