[Effect of drugs used in anesthesia on endocardial viability ratio (EVR) in cardiac surgery].
Endocardial viability ratio, arterial blood pressure, heart rate, central venous pressure and left ventricular diastolic pressure were examined in 50 patients undergoing one or more aorto-coronary grafts. General anaesthesia was obtained by morphine, diazepam, pancuronium and a mixture of oxygen and nitrous oxide. Morphine anesthesia did not effect EVR. Only mean arterial pressure showed a significant increase at the time of surgical stimulation. During sternotomy, EVR fell progressively in patients with hypertension. Tachycardia alone did not modify it. This hypertension was better treated by sodium nitroprussiate than by halothane or enflurane with regard to protection of the sub-endocardial layer against ischaemia. Under the influence of sodium nitroprussiate EVR rapidly reached values greater than those obtained under halothane or enflurane. In the hour following extra-corporeal circulation, endocardial viability ratio improved without any significant variation in classical haemodynamic parameters.
D000777:Anesthetics; D006348:Cardiac Surgical Procedures; D004699:Endocardium / Q000187:drug effects*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged
D000777:Anesthetics
Effet de drogues utilisées en anesthésie sur l'index de viabilité de l'endocarde (E.V.R. ou "endocardial viability ratio") en chirurgie cardiaque.