Familial progressive cardiac conduction defect (Orphanet_871) (PCCD) is a hereditary cardiac conduction disorder that may progress to complete atrioventricular (AV) block. The disease is either asymptomatic or manifests as dyspnea, dizziness, syncope, abdominal pain, heart failure or sudden death. Also known as: Familial Lenègre disease, Familial Lev disease, Familial Lev-Lenègre disease, Familial PCCD, Familial progressive heart block, Hereditary bundle branch defect.