Ventricular ectopic beats (VEBs) are common. Frequent (>60/hr or 1/min) in healthy subjects has an estimated prevalence of one to four percent in the general population. Over 10 percent on a Holter monitor is considered a high VEB burden. Monomorphic VEBs represent a focal arrhythmia arising from a single site. Generally, individuals with frequent monomorphic premature ventricular contractions (PVCs) have a benign clinical course. A portion have bothersome symptoms cardiomyopathy can develop in a minority of cases.
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