it is concluded that the levels of halothane commonly employed for general anesthesia significantly depress left ventricular performance in normal subjects , as evidenced by abnormal responses to alterations in preload and afterload , and that sti 's should not be employed for routine measurement of left ventricular performance during anesthesia unless both the afterload and the preload on the myocardium are known .
C0002915
general anesthesia
C0002903
anesthesia