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Multidose cardioplegia in a complex arterial switch procedure
Renee S Hartz1, Serafin Y Deleon, Jaime G Dorotan
1Department of Surgery, Tulane University Medical Center and Tulane University Medical School, New Orleans, Louisiana 70112, USA. rhartz@tulane.edu
Insights
Integrated cardioplegia techniques protected a newborn heart during a complex surgery, enabling survival of nearly 6 hours of ischemia with normal ventricular function postoperatively. This highlights advanced myocardial protection strategies in pediatric cardiac surgery.
Area of Science:
- Pediatric Cardiac Surgery
- Cardiothoracic Surgery
- Cardiovascular Medicine
Background:
- Adult cardiac surgery increasingly utilizes integrated cardioplegia due to patient factors like poor ventricular function and energy-depleted hearts.
- Complex procedures raise risks of reperfusion injury and calcium contracture (stone heart) after prolonged ischemia.
- Myocardial protection is crucial in high-risk cardiac operations.
Observation:
- A newborn diagnosed with transposition of the great arteries underwent a complex surgical procedure.
- The patient experienced an extended ischemic period, lasting almost 6 hours.
- The surgical team implemented integrated cardioplegia techniques for myocardial protection.
Findings:
- The newborn survived the extensive 6-hour ischemic time.
- Postoperative assessment revealed normal ventricular function.
- The successful outcome was attributed to the comprehensive myocardial protection strategy used during the surgery.
Implications:
- This case demonstrates the potential of advanced myocardial protection to facilitate complex cardiac repairs in neonates.
- Integrated cardioplegia can be safely and effectively applied in pediatric cardiac surgery, even in prolonged ischemic scenarios.
- The findings suggest that robust myocardial protection may improve outcomes for neonates with transposition of the great arteries and other complex congenital heart defects.
Abstract:
Integrated cardioplegia techniques have gained wide acceptance by surgeons performing adult cardiac surgery, because patients being referred are likely to have poor ventricular function and energy-depleted hearts. In addition, the increasing complexity of available procedures has led to an increased threat of reperfusion injury and calcium contracture ("stone heart") after prolonged ischemia. In this report, we describe the case of a newborn with transposition of the great arteries that survived almost 6 hours of ischemic time and has normal ventricular function postoperatively. We attribute this outcome to the myocardial protection employed throughout the procedure which allowed successful correction of a technical problem.