The Prognostic Significance of Frequency and Morphology of Premature Ventricular Complexes during Ambulatory Holter Monitoring

222 patients ≥18 years old referred for 24-hour ambulatory Holter monitoring, excluding those without PVCs or with more frequent ectopy (couplets, triplets, or nonsustained ventricular tachycardia). Mean age 55 ± 16 years, 43% male.

Multiform premature ventricular complexes (PVCs) on 24-hour Holter monitoring

Uniform premature ventricular complexes (PVCs) on 24-hour Holter monitoring

Adverse events (AE) defined as "major adverse cardiovascular event" or new/worsening heart failurecomposite