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What has happened to multiple arterial grafting in coronary artery bypass grafting surgery?
Tamer Elghobary1, Jean-Francois Légaré
1Department of Surgery, Division of Cardiac Surgery, Dalhousie University, Halifax, Nova Scotia, Canada.
Insights
Coronary artery bypass grafting (CABG) using arterial grafts may improve long-term outcomes compared to vein grafts. Despite benefits, multiple arterial grafts are underutilized in CABG procedures.
Area of Science:
- Cardiovascular Surgery
- Thoracic Surgery
- Vascular Surgery
Background:
- Coronary artery bypass grafting (CABG) is a standard treatment for multivessel coronary artery disease, demonstrating superior short- and medium-term survival rates compared to percutaneous coronary interventions (PCIs).
- Concerns exist regarding the long-term patency of vein grafts used in CABG, prompting investigation into the benefits of arterial grafts.
- Graft occlusion can lead to recurrent angina, hospital readmissions, reintervention, and mortality, highlighting the importance of graft longevity.
Purpose of the Study:
- To review the evidence on the risks and benefits of using multiple arterial grafts in CABG.
- To explore reasons for the limited adoption of multiple arterial grafting as a standard CABG approach.
Main Methods:
- Review of existing literature and registry data on coronary artery bypass grafting outcomes.
- Analysis of comparative studies between vein grafts and arterial grafts in CABG.
- Exploration of factors influencing the clinical practice patterns of multiple arterial grafting.
Main Results:
- CABG surgery generally provides better event-free survival than PCIs for multivessel coronary artery disease.
- Arterial grafts are suggested to offer improved long-term outcomes compared to vein grafts due to better patency rates.
- Despite potential benefits, the use of multiple arterial grafts in CABG remains low, estimated at approximately 10% of procedures.
Conclusions:
- While CABG is effective, the long-term performance of vein grafts is a concern.
- Multiple arterial grafting presents a potential for improved patient outcomes, yet its utilization is not increasing.
- Further investigation is needed to understand and overcome the barriers to the widespread adoption of multiple arterial grafting in CABG.
Abstract:
Coronary artery bypass grafting (CABG) is a well-established therapy for patients with multivessel coronary artery disease, with excellent short- and medium-term results. This is best illustrated by studies comparing percutaneous coronary interventions (PCIs) with CABG surgery, where CABG continues to offer better event-free survival. However, there has been increasing concern about the long-term patency of vein grafts utilized for CABG when compared with arterial grafts. Some have suggested that revascularization with arterial grafts rather than vein grafts may result in improved outcomes following CABG. This is particularly important when one considers that graft occlusion can result in recurrence of disabling angina, rehospitalization, reintervention and death. To date, however, multiple arterial grafts have yet to become the standard approach for patients undergoing CABG. This is best exemplified by reports from large registries suggesting that the use of multiple arterial grafting is limited to approximately 10% of all patients undergoing CABG. In this article, we will provide some of the evidence outlining the risk and benefits of multiple arterial grafting, but more importantly, begin to explore why the utilization of multiple arterial grafting does not appear to be increasing significantly.
