Features of hemodynamics in elderly patients with coronary heart disease using a combination of propofol, ketamine and fentanyl for induction anesthesia

Abstract

The aim – to analyze hemodynamic changes in elderly patients with coronary heart disease during coronary artery bypass grafting surgery without cardiopulmonary bypass at the stage of induction into anesthesia using propofol, ketamine and fentanyl.Materials and methods. The results of the examination of 20 patients with coronary artery disease over 60 years of age who underwent coronary artery bypass grafting without the use of artificial circulation are presented. The effect of anesthesia on hemodynamics was assessed by mean arterial pressure (MAP), heart rate (HR), cardiac index (CI), and systemic vascular resistance index (SVRI). The following drugs were used for induction: Propofol 1.5 mg/kg, Ketamine 0.5 mg/kg, Fentanyl 2.0 μg/kg, Pipecuronium bromide 0.1 mg/kg. Anesthesia maintenance: Propofol 4 mg/kg/hour, Fentanyl 2.0 μg/kg/hour.Results and discussion. At the time of admission to the surgery room, hemodynamic parameters reflected that the general condition of patients was stable. After the administration of the combination of drugs for induction propofol + fentanyl + ketamine in the dosage according to the study design, it was found that MAP decreased by 18.71 % (p<0,0001), heart rate decreased by 4.72 % (p = 0,2199), CI decreased by 14.37 % (p = 0,0035), and SVRI decreased by 3.93 % (p = 0,41). After insertion of the intubation tube, it was determined that MAP was 92.34±7.26 % of the baseline values (p = 0,0001), heart rate was 100.81±9.77 % of the baseline data (p = 0,848), CI was determined at 110.38±12.37 % of baseline value (p = 0,0769), and SVRI was 83.57±10.7 % of the baseline, respectively. In 25 minutes after successful tracheal intubation, the parameters were re-registered again: MAP = 86.47±6.07 % of the baseline (p < 0,0001); heart rate = 100.08±5.03 % of the baseline value (p = 0,9711); CI = 108.29±9.95 % of baseline data (p = 0,1248); SVRI = 77.86±9.83 % of the baseline (p = 0,0001).Conclusions. Since hypotension is a frequent side effect of traditional drugs for induction of anesthesia, such as propofol and fentanyl, the addition of ketamine to this combination helps to stabilize hemodynamic parameters and prevents undesirable hemodynamic fluctuations.