Isolated myocardial perfusion during arch repair

Area of Science:

• Cardiovascular Surgery
• Pediatric Cardiology
• Thoracic Surgery

Background:

• Coarctation of the aorta and interrupted aortic arch are critical congenital heart defects requiring complex surgical repair.
• Current techniques for aortic arch reconstruction can involve significant myocardial ischemic times, posing risks to cardiac function.

Purpose of the Study:

• To describe and evaluate a modified surgical technique for aortic arch reconstruction using isolated myocardial perfusion.
• To assess the impact of this technique on myocardial ischemic time during repair of severe aortic arch anomalies.

Main Methods:

• A modified surgical approach was employed in 5 patients with severe hypoplasia or interruption of the aortic arch.
• Isolated myocardial perfusion was achieved by reducing cardiopulmonary bypass flow during aortic arch repair, while the ascending aorta was cross-clamped distally.
• The heart was maintained perfused and beating throughout the aortic arch reconstruction phase.

Main Results:

• The modified technique successfully facilitated the repair of complex aortic arch anomalies in all 5 patients.
• Isolated myocardial perfusion during arch reconstruction significantly reduced the myocardial ischemic time compared to conventional methods.
• The heart remained perfused and beating during the critical arch repair period.

Conclusions:

• Isolated myocardial perfusion is a viable and effective modification for aortic arch reconstruction in complex cases.
• This technique offers significant myocardial protection by minimizing ischemic time during aortic arch repair.
• The described method holds promise for improving outcomes in neonates and infants with severe aortic arch defects.