Heart disease in the elderly.
D000367:Age Factors; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000628:therapy; D005260:Female; D006331:Heart Diseases; D006333:Heart Failure / Q000175:diagnosis / Q000209:etiology / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D010146:Pain; D010353:Patient Education as Topic