Current profile of the professional activities of the American cardiologist.
D000328:Adult; D000367:Age Factors; D000368:Aged; D006328:Cardiac Catheterization; D002309:Cardiology / Q000592:standards*; D002318:Cardiovascular Diseases / Q000175:diagnosis* / Q000628:therapy; D002568:Certification; D003325:Coronary Care Units; D004503:Education, Medical, Graduate; D004562:Electrocardiography; D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D008875:Middle Aged; D010820:Physicians / Q000600:supply & distribution; D011364:Professional Practice; D011859:Radiography; D012017:Referral and Consultation; D013038:Specialization; D013663:Teaching; D014481:United States