• Eun Seok Choi, Dong-Hee Kim, Bo Sang Kwon, Chun Soo Park, and Tae-Jin Yun.
• Division of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
• J. Thorac. Cardiovasc. Surg. 2024 Nov 7.

ObjectiveThis study investigated the outcomes after systemic-to-pulmonary artery shunt (SPS) in patients with biventricular circulation.MethodsBetween January 2014 and June 2023, among 406 patients who underwent SPS, 223 patients pursuing biventricular repair were included. Primary outcome of interest was major adverse shunt-related event (MASE) which was defined as the composite of cardiopulmonary resuscitation, extracorporeal membrane oxygenation, and shunt-related intervention.ResultsThe median age and body weight were 30 days and 3.5 kg, respectively. Median ratio of shunt diameter to body weight (mm/kg) was 1.0. The origin of SPS was the subclavian artery in 118 (52.9%), and the innominate artery in 93 patients (41.7%). There were 4 early deaths (1.8%), all of which were preceded by in-hospital MASE resulting from pulmonary overcirculation. There were two interstage deaths (0.9%). Competing risk analysis showed that the probability of biventricular repair at 24 months after SPS was 94.2%. In-hospital MASE occurred in 17 patients, with most cases (n=14, 82.4%) resulting from pulmonary overcirculation. In multivariable analysis, associated genetic or extracardiac anomalies (odds ratio [OR] 4.78; p=0.019), transposition of the great arteries (OR 6.42; p=0.012) and use of cardiopulmonary bypass (OR 7.39; p=0.001) were identified as risk factors for in-hospital MASE. Among 10 cases of inter-stage MASE, 9 cases were successfully managed up to biventricular repair.ConclusionsIn the current era, SPS is a safe and useful option for patients with biventricular circulation. In patients with risk factors for in-hospital MASE, meticulous efforts should be directed towards preventing pulmonary overcirculation to further enhance outcomes.Copyright © 2024. Published by Elsevier Inc.

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