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Coronary artery surgical technique
1University Hospital, Zürich, Switzerland.
Insights
Arterial conduits like the internal thoracic and gastroepiploic arteries are increasingly used in coronary artery bypass grafting. Careful selection and preparation are key to successful outcomes and avoiding complications.
Area of Science:
- Cardiovascular Surgery
- Vascular Biology
Background:
- Coronary artery bypass grafting (CABG) increasingly utilizes arterial conduits.
- Publications focus on indications, conduit choice, and side effects.
Purpose of the Study:
- To review current practices and evidence regarding arterial conduits in CABG.
- To discuss the benefits, risks, and specific applications of various arterial grafts.
Main Methods:
- Literature review of publications on arterial conduits in CABG.
- Analysis of data on graft patency, complications, and surgical techniques.
Main Results:
- Internal thoracic artery, right gastroepiploic artery, and inferior epigastric artery are primary arterial conduits.
- Inferior epigastric artery shows good patency but requires careful harvesting.
- Xenografts and allografts have poor late patency.
- Aprotinin may reduce blood loss but carries risks.
- Retrograde cardioplegia is beneficial for reoperations.
Conclusions:
- Arterial conduits offer advantages in CABG, with ongoing research into new options like the inferior epigastric artery.
- Careful patient selection, conduit preparation, and surgical technique are crucial for optimal results.
- Combined procedures like coronary revascularization and carotid endarterectomy are feasible but require further indication exploration.
Abstract:
The increased use of arterial conduits in coronary artery bypass grafting is reflected in numerous publications addressing indications, choice of conduits, and possible side-effects. Besides the internal thoracic artery, the right gastroepiploic artery is becoming established, and the inferior epigastric artery is being subjected to clinical trials. The latter conduit provides good patency and can be combined with the internal thoracic arteries, but harvesting must be done carefully to prevent local complications. Arterial conduits can lead to hypoperfusion, and additional saphenous vein grafting may become necessary; careful vasodilatation of the conduit before implantation is necessary. Xenografts and allogenic implants demonstrate poor late patency and should be used only as a last resort. Aprotinin reduces blood loss during surgery and seems to be particularly useful in reoperations; but it prolongs the activated clotting time and underheparinization can occur. Retrograde cardioplegia seems to be particularly indicated in reoperations, whereas topical cooling can be omitted. Coronary revascularization can be safely combined with carotid endarterectomy; the exact indication for this simultaneous procedure is still being explored.