title: [Proceedings: Effects of extrasystole on the left ventricular hemodynamics (1); changes of systolic time intervals].
mesh_terms: D000818:Animals; D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D004285:Dogs; D006323:Heart Arrest / Q000175:diagnosis*; D006339:Heart Rate; D006801:Humans; D013997:Time Factors