EDKP 485 Lecture Notes - Lecture 3: Russian Airborne Troops, Chemoreceptor, Bronchiole
17 Jan 2017
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Cardiac output co/q & heart rate hr & stroke volume sv. 1- cardiac output co/q = * relatively difficult to measure - catheter. In health co/q = increase from 5-10 l/min at rest to 25-30 l/min at peak exercise. & some plateau in very fit adult near end. In health hr-v"o2 & hr-workrate relationships = linear independent of age/sex/disease. In hr to ~100 bpm = parasympathetic nervous system pns withdrawal. In hr >100 bpm = sympathetic nervous system sns activation. In health sv = rise but plateau in fit or decline near end-exercise determined by. 1- end-diastolic volume pre-load = volume of blood in ventricles at end of. Diastole not enough time to fill w/ intensity so sv. 2- myocardial contractility = force of contraction * in sns stimulation. 3- mean arterial blood pressure after load = pressure generated by left. Ventricle must exceed/overcome > map to eject blood into circulation.
