Controls of ventricular contractility assessed by pressure-volume ration, Emax.
The present study on canine left ventricles showed that Emax which we previously proposed as a good index of both ventricular contractility and its pumping capability, decreased from 2.06 to 1.38 kPa/ml (15.5 to 10.4 mmHg/ml) via the sino-aortic baroreceptor reflex. Cerebral ischaemic response increased Emax to 3.83 kPa/ml (28.8 mmHg/ml). Emax decreased to 1.17 kPa/ml (8.8 mmHg/ml) after cardiac denervation.
D000818:Animals; D001011:Aorta / Q000502:physiology; D001926:Brain Death; D002306:Cardiac Volume; D002346:Carotid Sinus / Q000502:physiology; D003326:Coronary Circulation; D004285:Dogs; D002546:Ischemic Attack, Transient / Q000503:physiopathology; D009200:Myocardial Contraction; D011311:Pressoreceptors / Q000502:physiology; D011312:Pressure; D012018:Reflex; D014628:Vagotomy; D016276:Ventricular Function