Some observations on cardiology in the aged.
D000368:Aged; D006348:Cardiac Surgical Procedures; D002318:Cardiovascular Diseases / Q000175:diagnosis*; D004562:Electrocardiography; D006321:Heart / Q000502:physiology; D006801:Humans; D006973:Hypertension / Q000175:diagnosis; D008875:Middle Aged; D010138:Pacemaker, Artificial