Mysterious sudden death.
D000375:Aging; D003094:Collagen; D003326:Coronary Circulation; D003645:Death, Sudden; D006329:Heart Conduction System / Q000473:pathology / Q000502:physiology; D016027:Heart Transplantation; D006801:Humans; D009431:Neural Conduction; D012849:Sinoatrial Node / Q000473:pathology; D009435:Synaptic Transmission; D014184:Transplantation, Homologous
D003094:Collagen