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Abstract

Background:

Extracorporeal membrane oxygenation after the Norwood procedure has historically been associated with poor outcomes, with reported hospital survival rates of 13%–48%. We hypothesized that contemporary outcomes in this population have improved. We aimed to compare clinical outcomes of contemporary cohorts of patients with functional single ventricle physiology who did and did not receive extracorporeal membrane oxygenation after the Norwood procedure.

Methods:

Single-center retrospective cohort study of patients with single ventricle anatomy who underwent the Norwood procedure between 2009 and 2017 was performed. Kaplan–Meier survival curves were constructed, and Cox proportional hazard regression analyses were performed to compare transplant-free survival in patients who did and did not receive venoarterial extracorporeal membrane oxygenation.

Results:

In total, 85 patients met inclusion criteria. Venoarterial extracorporeal membrane oxygenation was utilized in 25 patients (29%). A total of 18 patients (72%) who received venoarterial extracorporeal membrane oxygenation survived to hospital discharge, compared to 54 patients (92%) who did not receive venoarterial extracorporeal membrane oxygenation (p = 0.013). Post-discharge transplant-free survival was not significantly different between patients who did and did not receive venoarterial extracorporeal membrane oxygenation (log-rank p value = 0.28). Cox proportional hazard regression analysis revealed that the occurrence of cardiac arrest requiring cardiopulmonary resuscitation (hazard ratio = 4.5; 95% confidence interval = 2.0–10.1) during the perioperative period was independently associated with death or transplantation, whereas venoarterial extracorporeal membrane oxygenation was not an independent risk factor for death or transplantation (hazard ratio = 2.0; 95% confidence interval = 0.8–4.9).

Conclusion:

In our cohort of children who received venoarterial extracorporeal membrane oxygenation after the Norwood procedure, hospital survival was improved compared to historical data. In addition, venoarterial extracorporeal membrane oxygenation utilization was not independently associated with worse outcomes.

Keywords

Cardiopulmonary resuscitation congenital heart defects extracorporeal membrane oxygenation hypoplastic left heart syndrome Norwood procedures

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Improved outcomes in neonates who require venoarterial extracorporeal membrane oxygenation after the Norwood procedure