Related Experiment Videos
[Coronary revascularization using only arterial grafts in patients with left main coronary artery stenosis]
1Department of Cardiovascular Surgery, Koseiren Hiroshima General Hospital, Japan.
Insights
Arterial grafts can be used for left main coronary artery (LMT) revascularization, even in complex cases. While some patients required intra-aortic balloon pump (IABP) support due to graft spasm, most grafts remained patent, showing feasibility.
Area of Science:
- Cardiovascular Surgery
- Vascular Grafting
- Coronary Artery Disease
Context:
- Arterial grafts like internal thoracic and gastroepiploic arteries are increasingly used for coronary revascularization.
- Application to left main coronary artery (LMT) disease has been limited.
- This study explores the use of arterial grafts exclusively in LMT patients.
Purpose:
- To evaluate the feasibility and outcomes of using only arterial grafts for coronary revascularization in patients with left main coronary artery disease.
- To assess graft patency, patient recovery, and the need for circulatory support.
Summary:
- A series of 9 LMT patients underwent coronary revascularization using only arterial grafts (left internal thoracic artery, right internal thoracic artery, right gastroepiploic artery).
- No operative deaths occurred, but 5 patients with >90% LMT stenosis required intra-aortic balloon pump (IABP) support post-cardiopulmonary bypass, attributed to graft spasm.
- Postoperative stress tests and angiograms showed 21 of 22 grafts were patent, with patients achieving New York Heart Association Class I or II functional status.
Impact:
- Demonstrates the possibility of arterial bypass grafting even in challenging left main coronary artery disease cases.
- Highlights the potential role of graft spasm as a cause of hemodynamic instability in this patient group.
- Suggests that arterial grafting, potentially with IABP support, is a viable option for LMT revascularization.
Abstract:
Although increasing use is being made of arterial grafts (internal thoracic arteries and right gastroepiploic artery) for coronary revascularization, application to left main coronary artery (LMT) patients is frequently not possible. During the period from December 1989 to July 1991, coronary revascularization was conducted on 9 LMT patients using only arterial grafts and no venous grafts. The bypass grafts were 6 left internal thoracic artery grafts, 9 right internal thoracic artery grafts and 9 right gastroepiploic artery grafts, a total of 24 grafts and an average of 2.7 bypasses per patient. There were no operated deaths, but five patients required IABP support after cardiopulmonary bypass. They had more than 90% stenotic lesions of left main coronary artery. In contrast, four patients with less than 90% stenotic lesion were uneventful. The cause of these catastrophic hemodynamics was considered reduced blood flow by graft spasm. All patients could be functionally placed in New York Heart Association Class I or II. Postoperative stress tests were made on eight patients and the results were normal in seven. Eight patients have had postoperative angiograms. Twenty-one of 22 grafts were patent. The present results demonstrate that an arterial bypass is possible even on LMT patients by IABP support.