Hemodynamic Outcomes of Etomidate and Propofol Induction in Non Cardiac Surgeries among Patients with Cardiac Comorbidities: A Retrospective Comparative Study
Background: The choice of anesthetic induction agent is particularly critical in patients with pre existing cardiac disease undergoing non cardiac surgery. Etomidate and propofol are commonly employed agents, yet they exert distinct cardiovascular effects. This study retrospectively evaluates the hemodynamic responses associated with etomidate versus propofol induction in cardiac patients undergoing non cardiac procedures. Materials and Methods: A retrospective observational analysis was conducted on 150 patients with documented cardiac comorbidities who underwent non cardiac surgery. Patients had received either etomidate (0.3 mg/kg) or propofol (2 mg/kg) for induction, as per anesthesiologist preference. Hemodynamic parameters including systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and cardiac output (CO) were extracted from anesthesia records at baseline, immediately post induction, and at one, three-, and five-minutes following induction. Data were analysed using SPSS version 25, with statistical significance defined at p < 0.05. Results: Patients induced with etomidate demonstrated only a modest decline in systolic blood pressure (baseline 130 ± 10 mmHg vs. post induction 126 ± 9 mmHg, p = 0.09), whereas those receiving propofol exhibited a marked reduction (baseline 132 ± 9 mmHg vs. post induction 111 ± 8 mmHg, p < 0.001). Heart rate remained stable in the etomidate group (baseline 75 ± 6 bpm vs. post induction 76 ± 5 bpm, p = 0.11), while propofol recipients showed a significant increase (baseline 74 ± 7 bpm vs. post induction 87 ± 6 bpm, p < 0.001). Cardiac output values were consistently better preserved in the etomidate group compared to the propofol group. Conclusion: This retrospective analysis suggests that etomidate provides superior cardiovascular stability compared to propofol in patients with cardiac disease undergoing non cardiac surgery. The pronounced hypotension and compensatory tachycardia observed with propofol warrant caution in this high risk population. Etomidate may thus represent a safer induction choice for maintaining perioperative hemodynamic stability.