Predictors and Therapy of Cardiomyopathy Caused by Frequent Ventricular Ectopy.

PURPOSE OF REVIEW: The aim of this review is to describe predictors and therapeutic principles for PVC-induced cardiomyopathy.

RECENT FINDINGS: PVC-induced cardiomyopathy is a treatable condition resulting in a reversible form of cardiomyopathy. PVC-induced cardiomyopathy has only recently been recognized as an entity that causes a reversible form of cardiomyopathy. The mechanism of development of PVC-induced cardiomyopathy has not yet been elucidated, although dyssynchrony appears to play a major role. Multiple factors have been described that are independently associated with PVC-induced cardiomyopathy. Predictors of PVC-induced cardiomyopathy include PVC prevalence, epicardial origin, male gender, longer symptom duration and asymptomatic status, presence of interpolated PVCs, lack of circadian variability, and a broader PVC-QRS width. In the presence of cardiomyopathy, work-up for structural heart disease and its etiology should be performed, followed by aggressive attempts at PVC reduction. There is evidence that ablation therapy is superior to medical therapy for frequent PVCs, but treatment decisions need to be individualized depending on the patients symptoms, PVC prevalence, PVC origin, patients comorbidities, and patient preference. The potential of sudden cardiac death associated with the presence of structural heart disease needs to be recognized, and appropriate risk stratification is mandatory.