The electrocardiogram during exercise. Findings in bipolar chest leads of 1,449 middle-aged men, at moderate work levels.
D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D002320:Cardiovascular Physiological Phenomena; D003327:Coronary Disease / Q000175:diagnosis*; D005080:Exercise Test; D006327:Heart Block / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008910:Minnesota; D009790:Occupations; D011890:Railroads