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Coronary revascularization in the 21st century. Emphasis on contributions by Japanese surgeons
1Washington University School of Medicine, St. Louis, Missouri, USA. barnerh@msnotes.wustl.edu
Insights
Arterial grafts, particularly the left internal thoracic artery (ITA), significantly improve long-term survival in coronary artery bypass surgery. Utilizing multiple arterial conduits offers further benefits for patient outcomes.
Area of Science:
- Cardiovascular Surgery
- Thoracic Surgery
- Vascular Biology
Background:
- Coronary artery bypass grafting (CABG) has evolved significantly over 30 years.
- Advances include cardioplegia, instrumentation, endoscopic techniques, robotics, and understanding endothelium.
- These innovations have improved surgical outcomes.
Purpose of the Study:
- To highlight the critical role of bypass conduit choice in long-term CABG results.
- To emphasize the superior survival benefit of arterial conduits, especially the left internal thoracic artery (ITA).
- To acknowledge Japanese contributions to arterial conduit advancements in CABG.
Main Methods:
- Review of historical developments and clinical outcomes in CABG.
- Comparative analysis of different bypass graft types.
- Focus on the impact of arterial conduits on patient survival.
Main Results:
- The choice of bypass conduit is the most crucial factor for long-term CABG success.
- Left internal thoracic artery (ITA) grafting to the left anterior descending artery offers superior survival compared to other factors.
- Using bilateral ITAs provides additional benefits, with potential advantages for three or more arterial grafts.
Conclusions:
- Arterial conduits, particularly the ITA, are paramount for superior long-term outcomes in CABG.
- The use of multiple arterial grafts is likely to become increasingly important.
- Japanese surgeons have played a vital role in advancing arterial conduit utilization in CABG.
Abstract:
The first three decades of coronary artery surgery have provided the foundation for the next century of this evolution. It is apparent that a multitude of events including the development of cardioplegia, improving surgical instrumentation, technological advances including endoscopic approaches and computer assisted robotics and biologic discoveries such as the role of the endothelium have provided the underpinnings for improved surgical outcomes. However, the single most important determinant of late results is the type of bypass conduit used for grafting. Thus, use of the left internal thoracic artery (ITA) grafted to the left anterior descending coronary is a more important determinant of survival than is any other factor (progression of coronary artery disease, increased age, poor left ventricular function, diabetes, female gender and off-pump operations). Use of two ITAs provides further benefit and it is likely that three or more arterial conduits will be shown to be advantageous in this regard in due time. Japanese cardiothoracic surgeons have made significant contributions to the continuing evolution of coronary bypass surgery and particularly to the advance of arterial conduits. This report will address those contributions to this evolution.