Related Experiment Videos
Arterial switch: translocation of the intramural coronary artery
1Victorian Cardiac Surgical Unit, Royal Children's Hospital, Melbourne, Australia.
Insights
This study presents a surgical technique for managing intramural coronary arteries during arterial switch procedures for transposition of the great arteries. The described method successfully corrected coronary artery anatomy without operative mortality or ischemic complications.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Intramural coronary arteries pose significant challenges in the surgical correction of transposition of the great arteries (TGA).
- Accurate intraoperative diagnosis and effective management strategies are crucial for successful outcomes.
Purpose of the Study:
- To describe a surgical technique for managing intramural coronary arteries during the arterial switch procedure for TGA.
- To evaluate the safety and efficacy of this technique in preventing ischemic complications.
Main Methods:
- A novel surgical approach involving detachment of the posterior aortic valve commissure and unroofing of intramural coronary arteries was employed.
- Coronary arteries were excised as a single disc, divided into cuffs, and the arterial switch performed.
- Resuspension of the aortic valve commissure to a pericardial patch reconstructed the neopulmonary sinus.
Main Results:
- Out of 259 patients undergoing arterial switch, 12 (4.6%) had intramural coronary arteries diagnosed intraoperatively.
- Five distinct types of intramural coronary anatomy were identified, with half exhibiting ostial stenosis.
- No operative or late deaths occurred during 328 patient-months of follow-up.
- Postoperative electrocardiograms and echocardiograms showed no ischemic changes or abnormal wall motion.
Conclusions:
- The described surgical technique provides a satisfactory method for managing intramural coronary arteries in TGA patients.
- This approach facilitates the successful completion of the arterial switch procedure in all cases, ensuring favorable long-term outcomes.
Abstract:
Translocation of an intramural coronary artery is one of the most challenging problems in anatomic correction of transposition of the great arteries. Of 259 patients undergoing arterial switch procedure for transposition of the great arteries in our hospital, 12 (4.6%) were found to have intramural coronary arteries. The diagnosis was made intraoperatively in all patients. There were five different types of intramural coronary anatomy noted, with ostial stenosis present in half. The operative technique consisted of detachment of the posterior commissure of the aortic valve and unroofing of the intramural segment of the coronary artery by excision of a triangular portion of internal aortic wall. The coronary arteries were excised as a single disc, which was divided into two cuffs. The arterial switch was then performed in the usual fashion. The posterior commissure of the aortic valve was resuspended to the pericardial patch used to reconstruct the neopulmonary artery sinus. There were no operative or late deaths over a follow-up of 328 patient-months. Postoperatively, no patient showed ischemic changes on electrocardiogram or abnormal wall motion on echocardiogram. We believe that intramural coronary arteries can be managed satisfactorily with this technique, and that arterial switch will be possible in all cases.