Preventive cardiology.
D002318:Cardiovascular Diseases / Q000453:epidemiology / Q000517:prevention & control* / Q000628:therapy; D003325:Coronary Care Units; D003604:Czechoslovakia; D006801:Humans; D008297:Male; D008875:Middle Aged; D011635:Public Health Administration; D012424:Rural Population; D014505:Urban Population