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Updated: Aug 5, 2026
Hemodynamic Precision in the Neonatal Intensive Care Unit using Targeted Neonatal Echocardiography
Published on: January 27, 2023
Association of postoperative haemodynamic parameters with progression of left atrioventricular regurgitation in
Rohit Seth Loomba1,2, Oscar Dominguez2, Jamie Smith Penk3
1Cardiology, Northwestern University, USA.
Insights
Postoperative hemodynamic management is crucial after atrioventricular septal defect repair. Blood pressure variability, not just mean arterial pressure, significantly impacts left atrioventricular valve function in infants.
Area of Science:
- Pediatric Cardiology
- Cardiac Surgery
- Critical Care Medicine
Background:
- Left atrioventricular valve function is critical for successful atrioventricular septal defect repair outcomes.
- Postoperative hemodynamic management is essential due to the valve's exposure to systemic pressures.
Purpose of the Study:
- To characterize early postoperative hemodynamics in infants following atrioventricular septal defect repair.
- To investigate the association between hemodynamic variables and left atrioventricular valve regurgitation progression.
Main Methods:
- Retrospective single-center study of infants (<1 year) post-atrioventricular septal defect repair.
- Utilized high-fidelity physiologic data and echocardiograms for 48-hour monitoring.
- Employed generalized estimation equation modeling to analyze hemodynamic associations.
Main Results:
- 32% of patients showed worsening left atrioventricular valve regurgitation.
- Increased mean arterial blood pressure and blood pressure variability correlated with worse regurgitation.
- Decreased cerebral and renal near-infrared spectroscopy also associated with worsening regurgitation.
Conclusions:
- Early postoperative hemodynamic alterations, especially blood pressure variability, impact left atrioventricular valve function post-repair.
- Optimal hemodynamic state involves high cardiac output, low systemic vascular resistance, and minimal blood pressure variability.
Background:
The success of an atrioventricular septal defect repair depends largely on the function of the left atrioventricular valve. Given the exposure of this valve to systemic pressures, postoperative haemodynamic management has been of interest, though practices are variable.
Methods:
A single-centre, retrospective study of infants less than 1 year of age admitted to the paediatric cardiac ICU following atrioventricular septal defect repair between January 2022 and May 2025 was conducted. Utilising high-fidelity physiologic data, the primary aim of this study was to characterise haemodynamics in the first 48 h of progression of left atrioventricular valve regurgitation after complete repair. Regurgitation data was collected from echocardiograms. Generalised estimation equation modelling was done to help further isolate the association of worsening left atrioventricular valve regurgitation with haemodynamic variables.
Results:
Among twenty-eight patients, nine (32%) exhibited worsening left atrioventricular valve regurgitation. Haemodynamic parameters significantly correlated with worse left atrioventricular valve regurgitation were increased mean arterial blood pressure, increased blood pressure variability, and decreased cerebral and renal near-infrared spectroscopy. Of note, blood pressure variability had a greater association with worsening left atrioventricular valve regurgitation when compared to absolute mean arterial blood pressure.
Discussion:
In infants recovering from atrioventricular septal defect repair, early postoperative haemodynamic alterations, in particular mean arterial blood pressure variability, are associated with worse left atrioventricular valve function. A high cardiac output, low systemic vascular resistance state with minimal blood pressure variability appears optimal to decrease impact on the left atrioventricular valve.
