symptomatic ventricular ectopyfrequent ventricular ectopyasymptomatic ventricular ectopypremature ventricular ectopyatrial and ventricular ectopyisolated ventricular ectopyunifocal ventricular ectopycomplex ventricular ectopybenign ventricular ectopyrare ventricular ectopyheart ectopyventricular ectopics and exercise