Estudo hemodinâmico comparativo entre anestesia geral balanceada e anestesia venosa total em cirurgia de resvacularizaçåo do miocárdio / Comparative hemodynamic study between balanced anesthesia and total intravenous anesthesia in myocardial revascularization surgery

ABSTRACT

A hemodynamic evaluation was conducted on thirty-one patients undergoing myocardial revascularization surgery with two different anesthetic techniques. Fifteen patients (Group A) received balanced general anesthesia while sixteen patients (Group B) received total intravenous anesthesia. In addition, patients in both groups received, during the anesthetic procedure, sodium, nitroprusside, Inoval and dopamine infusion. Except before ECC time when higher dosages of Inoval and dopamine were used on patients in group B, the amount of these drugs given during anesthesia was not significantly diferent between the two groups. Heart rate (HR), mean arterial pressure (MAP) central venous pressure (CP), and left atrium pressure (LAP) data were similar in both groups. In regard to CVP, however, significant differences were found before induction (Group Aheart rates were found prior to anesthetic induction (p<0.05) and thirty minutes after the induction (p<0.05) in group A. The MAP maintened similar levels throughout surgical procedures, except before ECC when slightly higher rates were found in Group A (p<0.02). Left atrium pressure values remained stable during all surgical periods showing no significant differences between groups