Left ventricular performance and cerebral haemodynamics during xenon anaesthesia. A transoesophageal echocardiography and transcranial Doppler sonography study

Abstract

The effects of xenon anaesthesia on myocardial function and cerebral blood flow velocities were investigated with transoesophageal echocardiography and transcranial Doppler sonography. Seventeen ASA 1 patients undergoing open cholecystectomy (n = 16) or abdominal hysterectomy (n = 1) were studied. Anaesthesia with 65% xenon in oxygen was induced by ventilating the lungs through a circle system with minimal fresh gas flow. The echocardiographically obtained mean (SD) fractional area change in a short axis view of the left ventricle at the level of the papillary muscles was 65 (10)% (n = 14) before xenon. There was no significant change after 5, 10 and 15 min of xenon anaesthesia. Cerebral blood flow velocities were unchanged during the first 5 min of xenon anaesthesia, but were significantly increased in the left and right middle, and the right anterior, cerebral arteries after 15 and 30 min (n = 16) (p < 0.05). In conclusion, xenon anaesthesia had no adverse effect on myocardial function, but probably increased cerebral flood flow.