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[Is it necessary to operate quickly in patients with significant left main coronary stenosis?]
A Sharareh1, A Furber, O Cochou
1Services de cardiologie, CHU Angers, 4, rue Larrey, 49033 Angers.
Insights
Waiting for coronary bypass surgery after diagnosis is generally safe, with serious cardiac events occurring in only 6.5% of patients. Recent myocardial infarction and unstable angina predict complications.
Area of Science:
- Cardiology
- Vascular Surgery
Context:
- Left main coronary stenosis often requires urgent coronary artery bypass graft (CABG) surgery.
- Optimal timing for CABG after coronary angiography is not well-defined.
- Multicenter studies are crucial for establishing clinical guidelines.
Purpose:
- To assess the incidence of serious cardiovascular events between coronary angiography and surgery in patients with left main coronary stenosis.
- To identify predictors of preoperative complications.
- To determine if immediate revascularization is necessary for high-risk subgroups.
Summary:
- A multicenter study analyzed 283 patients with left main coronary stenosis.
- Serious cardiac events (death, myocardial infarction, etc.) occurred in 6.5% of patients awaiting surgery.
- Recent myocardial infarction, unstable angina, and left ventricular dysfunction predicted complications.
Impact:
- The findings suggest a strategy of selective surgical timing is safe for most patients with left main coronary stenosis.
- This approach avoids unnecessary emergency surgeries.
- Identifies high-risk patients who may benefit from expedited revascularization.
Abstract:
Although coronary bypass surgery is performed rapidly in the majority of cases of left main coronary stenosis to prevent cardiovascular complications, there is no reported consensus in the literature about the ideal interval between diagnostic coronary angiography and surgery. The aim of this multicenter study was to make an inventory of the serious vascular cardiovascular events which occurred between coronary angiography and surgery to determine possible predictive factors for complications and thereby identify a high risk subgroup requiring immediate revascularisation. The population comprised 283 patients with significant left main coronary disease, out of a total of 8,205 patients who underwent coronary angiography in the university hospitals of Angers, Brest, Nantes, Poitiers and Rennes. A surgical indication was retained in 216 patients. The choice of the operation date depended on clinical data in the presence of an acute coronary syndrome, patients remaining in the intensive care unit and undergoing revascularisation rapidly. Serious cardiac events (death, myocardial infarction, refractory unstable angina and left ventricular failure) occurring while waiting for surgery were rare, observed in only 6.5% of patients. Recent myocardial infarction and, to a lesser degree, unstable angina and/or left ventricular systolic dysfunction, were predictive of serious cardiac complications before surgery. The severity of the left main coronary disease and the association of right coronary disease did not increase the risk of serious cardiac events in the preoperative period. The low incidence of complications demonstrates that this strategy enables patients to wait for surgery with an acceptable risk without having to operate all patients with left main coronary disease as an emergency.