Emergency management for critical left main coronary artery stenosis
Onur Sokullu1, Numan Ali Aydemir, Erol Kurc
1Siyami Ersek Thoracic, Cardiovascular Surgery Training and Research Hospital, 66 Ada, Atasehir, Istanbul, Turkey. onursokullu@gmail.com
Insights
Coronary bypass grafting offers superior survival rates compared to percutaneous intervention for left main coronary artery (LMCA) occlusions. Bypass grafting is the recommended intervention for critical LMCA stenosis.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
Background:
- Percutaneous interventions are increasingly used for left main coronary artery (LMCA) occlusions due to technological advancements.
- Current data are insufficient to establish a consensus on the optimal intervention for critical LMCA occlusions.
Purpose of the Study:
- To compare the outcomes of coronary bypass grafting versus percutaneous intervention for unprotected left main coronary artery stenosis.
- To analyze risk factors and their impact on myocardial revascularization outcomes.
Main Methods:
- Retrospective analysis of 108 patients with unprotected LMCA stenosis (>80%) treated between 2002 and 2006.
- Comparison of early and late survival rates between 83 patients undergoing bypass grafting and 20 patients undergoing percutaneous intervention.
Main Results:
- Early survival rates were 84.1% for bypass grafting and 63% for percutaneous intervention.
- Mean survival time was significantly longer for bypass grafting (44.5 months) compared to percutaneous intervention (2.3 months).
- Late survival rates favored coronary bypass grafting.
Conclusions:
- Coronary bypass grafting is the preferred intervention for myocardial revascularization in patients with critical LMCA occlusion.
- While percutaneous interventions can be lifesaving in emergencies, they are associated with lower survival rates in the long term.
Background:
Increased experience and improvements in technology seem to have encouraged the use of percutaneous interventions for left main coronary artery (LMCA) occlusions. There is no consensus, however, and the data are inadequate on whether surgery or percutaneous procedures should be the intervention of choice for critical occlusions.
Methods:
From January 2002 to December 2006, 108 patients with unprotected LMCA stenosis >80% were treated at our center. Eighty-three patients (77%) underwent bypass grafting and 20 (18%) underwent percutaneous intervention for the purpose of myocardial revascularization. We analyzed parameters demonstrated as risk factors for myocardial revascularization and their predicted effects on outcome.
Results:
Five patients (5%) died following emergency cardiopulmonary resuscitation before any intervention was performed. The early survival rate was 84.1% in the coronary bypass group and 63% in the percutaneous intervention group. The mean (±SD) survival time was 55.7 ± 2.6 months in the bypass group and 7.6 ± 1.3 months in the percutaneous group. The late-survival rate was also significantly higher in the bypass group. The mean late-survival time was 44.5 ± 3.6 months in the bypass group and 2.3 ± 0.8 months in the percutaneous group.
Conclusion:
Although emergency percutaneous interventions are lifesaving in some cases, these results clearly demonstrate that coronary bypass grafting should be the intervention of choice for myocardial revascularization in patients with critical LMCA occlusion.
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