PMID: 2787130Jul 1, 1989

Hemodynamic and cardiodynamic effects of propofol and etomidate: negative inotropic properties of propofol

Anesthesia and Analgesia
T BrüsselP Lawin


The hemodynamic effects of an induction dose of propofol, 2.5 mg/kg, or etomidate, 0.3 mg/kg, were studied in eight dogs. In addition, cardiodynamic changes were measured using a left ventricular catheter and needle force probes. Propofol was associated with significant decreases in systolic (19.9%) and diastolic (25.3%) arterial pressures associated with a 17.3% decrease in cardiac output (CO) and a 11.6% reduction in systemic vascular resistance (SVR) without change in pulmonary capillary wedge pressure (PCWP). These changes were most pronounced 1 min after the injection of propofol. At 5 and 10 min after the administration of propofol, heart rate (HR) decreased significantly. Minimal changes in hemodynamics were observed with etomidate. Propofol lowered systolic left ventricular pressure (LVPsys) by 17.6%. Signals generated by the force probes in the left ventricular myocardium showed a significant reduction (16.3%) in left ventricular force (LVF) and a decrease in early systolic rates of increase in force (dF/dt max) by 23.5% associated with propofol. In the presence of an unchanged preload, an unchanged HR, and a decreased SVR, the reduction in CO suggests that propofol has a negative inotropic effect. This negative inotro...Continue Reading


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