An Observational Study to Assess Real-world Patient Characteristics, Clinical Course, and Treatment Patterns for Symptomatic Patients With Arrhythmogenic Cardiomyopathy (ACM) Due To a PlaKoPhilin-2 Pathogenic Variant (PKP2)

Inclusion Criteria: * Adults with a clinical diagnosis of ACM as defined by the 2010 revised Task Force Criteria (TFC) * Documentation of a pathogenic or likely pathogenic truncating variant in PKP2 * Frequent premature ventricular contractions (PVCs) * Patients must have an ICD placed prior to enrollment * Left ventricular ejection fraction (LVEF) ≥ 50% for Part A participants. Left ventricular ejection fraction (LVEF) ≥40% for Part B participants. Exclusion Criteria: * Evidence of variant(s) in addition to PKP2 that meet standard criteria to be considered pathogenic or likely pathogenic f…