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Published on: June 16, 2023
Hemodynamic response to laparoscopic cholecystectomy--impacts of increased afterload and ischemic dysfunction of the
1Department of Internal Medicine, General Teaching Hospital and 1st Medical Faculty of Medicine, Charles University, Karlovo námestí 32, 128 08 Prague 2, Czech Republic. danzig@centrum.cz
Insights
Intra-operative hemodynamic monitoring during laparoscopic cholecystectomy revealed distinct cardiovascular responses in patients with ischemic left ventricular dysfunction and aortic stenosis. These findings highlight crucial differences in managing high-risk cardiac patients during surgery.
Area of Science:
- Cardiovascular Anesthesiology
- Surgical Hemodynamics
- Transesophageal Echocardiography
Background:
- Laparoscopic cholecystectomy presents unique hemodynamic challenges.
- Patients with ischemic left ventricular dysfunction and aortic stenosis are at increased surgical risk.
- Understanding intra-operative hemodynamic changes is critical for patient safety.
Purpose of the Study:
- To compare intra-operative hemodynamic monitoring in patients undergoing laparoscopic cholecystectomy with ischemic left ventricular dysfunction and severe aortic stenosis.
- To identify differences in hemodynamic responses to anesthesia induction, capnoperitoneum, and anti-Trendelenburg positioning.
- To assess the safety and efficacy of monitoring in these high-risk patient groups.
Main Methods:
- Transesophageal echocardiography was used for hemodynamic monitoring.
- Measurements were taken at three key surgical stages: post-anesthesia induction, post-capnoperitoneum, and post-anti-Trendelenburg positioning.
- Data from 13 patients with ischemic dysfunction and 12 with aortic stenosis were compared to a control group of 10 healthy individuals.
Main Results:
- Significant differences were observed in the time course of heart rate, mean arterial pressure, pressure-rate-product, and cardiac output between groups.
- Aortic stenosis group showed distinct mean arterial pressure changes; ischemic dysfunction group showed heart rate dependency.
- A notable drop in peripheral vascular resistance occurred post-positioning, only partially explained by medications.
Conclusions:
- Intra-operative hemodynamic monitoring effectively identified distinct physiological responses in patients with ischemic left ventricular dysfunction and aortic stenosis.
- The study demonstrated varied hemodynamic patterns crucial for managing these complex cardiac conditions during surgery.
- No complications were reported in any of the 35 patients, including the 25 with severe cardiac conditions, underscoring the safety of the monitored procedures.
Abstract:
The authors describe the results of intra-operative hemodynamic monitoring during laparoscopic cholecystectomy in patients with ischemic left ventricular dysfunction and with significant aortic stenosis. The results in the groups composed of 13 and 12 patients were compared with the findings in 10 young, non-obese, non-smokers without significant cardiovascular history and with normal findings during resting transthoracic echocardiography. Monitoring itself was conducted using transesophageal echocardiography 1) after the induction of anesthesia, 2) after the induction of capnoperitoneum, and 3) after setting the operative anti-Trendelenburg position. The measurements were performed at least in triplicate and the results were processed using ANOVA test. Significant differences were identified in the time course patterns of heart rate, mean arterial pressure, dual product (pressure-rate-product), and cardiac output. In terms of pathophysiology, we believe that the most important achievement was the identification of different time course patterns of individual parameters in the respective groups. The results in the group of patients with aortic stenosis were based particularly on the different time course of the mean arterial pressure, while the results in patients with ischemic disease were more dependent on the time course of the heart rate. Very interesting is a drop of peripheral vascular resistance after positioning of these patients which could be explained only partially by a beta-blocking or ACEI medication. In clinical terms, the most important finding was probably that no complications occurred in the entire group of 35 patients, of which 25 suffered from severe organic cardiopathies.
