Effects of postextrasystolic potentiation on systolic time intervals.
D003327:Coronary Disease / Q000503:physiopathology; D004558:Electric Stimulation; D004562:Electrocardiography / Q000379:methods; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged