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Preoperative left ventricular dysfunction and operative risks in coronary bypass surgery
M Goenen1, J L Jacquemart, S Galvez
1Department of Intensive Care Medicine and Cardiac Surgery, Catholic University of Louvain, Brussels, Belgium.
Insights
Preoperative left ventricular dysfunction increases the risk of complications after coronary bypass surgery. Patients with abnormal criteria faced higher rates of inotropic therapy, arrhythmias, and longer intensive care unit stays.
Area of Science:
- Cardiology
- Cardiac Surgery
- Cardiovascular Research
Background:
- Preoperative left ventricular (LV) function is crucial for predicting outcomes in cardiac surgery.
- Identifying preoperative risk factors can optimize patient management and surgical planning.
Purpose of the Study:
- To evaluate preoperative left ventricular function variables as predictors of perioperative and postoperative complications in patients undergoing coronary bypass surgery.
Main Methods:
- A cohort of 183 consecutive patients undergoing coronary bypass surgery were assessed.
- Patients were divided into two groups: no abnormal LV function criteria (N) and at least one abnormal criterion (AN).
- Complications, including need for inotropic therapy, intra-aortic balloon pump use, arrhythmias, ICU stay, perioperative necrosis, mortality, and long-term outcomes, were compared between groups.
Main Results:
- The abnormal criteria group (AN) had a significantly higher incidence of prior myocardial infarction (71.6% vs 39.6%).
- AN patients required more inotropic therapy (30% vs 11%), intra-aortic balloon pump support (13% vs 0%), experienced more arrhythmias (40% vs 20%), and had longer ICU stays (3.9 vs 2.3 days).
- No significant differences were observed in perioperative necrosis, mortality, or long-term mortality and angina recurrence over two years.
Conclusions:
- Preoperative left ventricular dysfunction is associated with increased early postoperative complications following coronary bypass surgery.
- While LV dysfunction impacts early recovery, it did not significantly affect long-term mortality or angina recurrence in this cohort.
- These findings highlight the importance of assessing LV function for managing immediate postoperative care in cardiac surgery patients.
Abstract:
Preoperative left ventricular function variables were evaluated as potential risk factors for peroperative and postoperative complications in 183 consecutive patients undergoing coronary bypass surgery. Fifty-six patients had no abnormal criteria and 127 had at least one criterion (AN). The incidence of history of infarction was significantly greater in the AN (71.6 percent) than in the N (39.6 percent) group (p less than 0.04). During the early postoperative course, N and AN differentiated significantly in (1) the need for inotropic therapy (II vs 30 percent, p less than 0.05); (2) intra-aortic balloon pump (0 vs 13 percent); (3) arrhythmias (20 and 40 percent, p less than 0.002); and (4) stay in the Intensive Care Unit (2.3 +/- 0.8 and 3.9 +/- 2 days, p less than 0.01). Perioperative necrosis and mortality were not different. During a follow-up period of two years, N and AN did not show any difference in mortality and recurrence of angina.