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Outcomes of single ventricle palliation in infants with heterotaxy syndrome
Janez Vodiskar1,2, Takashi Kido1,2, Martina Strbad1,2
1Department of Congenital and Pediatric Heart Surgery, German Heart Center Munich, Technical University of Munich, School of Medicine, Munich, Germany.
Insights
Heterotaxy increases risks in single ventricle palliation. Early intervention for restrictive pulmonary blood flow and moderate atrioventricular valve regurgitation is crucial for improving survival in these complex patients.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Disease
- Cardiac Surgery
Background:
- Heterotaxy is associated with increased morbidity and mortality in patients undergoing single ventricle palliation.
- Understanding outcomes in this specific patient population is critical for optimizing surgical strategies.
Purpose of the Study:
- To evaluate the outcomes of staged single ventricle palliation in patients with heterotaxy.
- To identify risk factors associated with mortality in this cohort.
Main Methods:
- Retrospective analysis of patients with heterotaxy undergoing staged single ventricle palliation between 2001 and 2019.
- Inclusion criteria: patients born within the study period requiring staged palliation for single ventricle physiology and heterotaxy.
- Statistical analysis included multivariate COX regression to identify independent risk factors for mortality.
Main Results:
- Fifty-three patients were included, with common findings including right ventricular dominance (66%) and atrioventricular septal defects (70%).
- Overall survival was 92% at 1 month, 74% at 1 year, and 68% at 10 years.
- Independent risk factors for mortality were restrictive pulmonary blood flow (HR 3.23) and atrioventricular valve regurgitation greater than mild (HR 3.57).
Conclusions:
- Patients with single ventricle and heterotaxy face significant mortality and morbidity.
- Restrictive pulmonary blood flow and significant atrioventricular valve regurgitation are key predictors of mortality.
- Total anomalous pulmonary venous connection was not a significant risk factor in the current era.
Objectives:
Heterotaxy is a known risk factor for morbidity and mortality in single ventricle palliation. In this study, we examined our experience with this challenging group of patients.
Methods:
Records of patients born between 2001 and 2019 with heterotaxy, who needed staged single ventricle palliation were retrospectively analysed.
Results:
A total of 53 patients were included in this study. Thirty-five (66%) patients had a right ventricular dominance, common atrioventricular septal defect was present in 37 (70%) patients. Anomalous pulmonary venous drainage was present in 29 (55%) patients. Forty-six (86%) patients underwent first-stage palliation. Forty-one (77.3%) patients received a bidirectional cavopulmonary connection. Thirty-one (58%) patients received total cavopulmonary connection (TCPC). Overall survival rate was 92% at 1 month, 74% at 1 year and 68% at 10 years. Twelve (22.6%) patients died before second palliation stage. Four (10%) patients died before TCPC. No patient died after TCPC. Independent risk factors for mortality in the multivariate COX regression were a presence of restrictive pulmonary blood flow (HR 3.23; 95% CI 1.02-10.2; P = 0.05) and greater than mild atrioventricular valve regurgitation (HR 3.57; 95% CI 1.27-10.0; P = 0.02).
Conclusions:
Mortality and morbidity in patients with single ventricle and heterotaxy are high. Restrictive pulmonary blood flow needing early modulation and greater than mild atrioventricular valve regurgitation at presentation are independent risk factors for mortality. Total anomalous pulmonary venous connection was not identified as a risk factor in the current era.
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