More than 500 PVBs per 24 hours on Holter monitoring may signal risk of SCD and is a diagnostic criterion for arrhythmogenic cardiomyopathy. 22 23 However, frequent PVBs are associated with a benign ...

### Learning objectives Ventricular arrhythmias present in many ways, ranging from isolated premature beats to sustained ventricular tachycardia (VT). They can occur in patients with or without ...