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Updated: Mar 20, 2026
Implantation of Left Ventricular Assist Device (LVAD) in Juvenile Landrace Swine: A LVAD Implantation Model of Pediatric Heart Failure
Published on: January 16, 2026
Acute Biventricular Interaction in Pediatric Patients Implanted with Continuous Flow and Pulsatile Flow LVAD: A
Arianna Di Molfetta1, Gianfranco Ferrari, Roberta Iacobelli
1From the *Department of Pediatric Cardiology and Cardiac Surgery, Pediatric Hospital Bambino Gesù, Rome, Italy; †Cardiovascular Engineering Laboratory, Institute of Clinical Physiology, Rome, Italy; and ‡ Department of Cardiac Surgery, KU Leuven, Leuven, Belgium.
Insights
Left ventricular assist devices (LVADs) improve left ventricular function in pediatric patients. These devices also enhance right ventricular function by reducing afterload and improving coupling, though septum shift impacts this effect.
Area of Science:
- Cardiovascular Physiology
- Biomedical Engineering
- Pediatric Cardiology
Background:
- Left ventricular assist devices (LVADs) are crucial for pediatric heart transplantation.
- The impact of LVADs on right ventricular (RV) function remains a significant clinical question.
Purpose of the Study:
- To investigate ventricular interdependence in pediatric patients with continuous-flow (c-LVAD) and pulsatile-flow (p-LVAD) devices.
- To analyze the effects of varying LVAD parameters on both left ventricular (LV) and RV function.
Main Methods:
- Utilized a lumped parameter model incorporating septal representation for simulating pediatric patient data.
- Simulated various c-LVAD speeds and p-LVAD settings (rate, systole duration, pressures).
- Assessed LV and RV function, energetics, preloads, and afterloads.
Main Results:
- Both c-LVAD and p-LVAD unload the LV, reducing external work and enhancing ventriculo-arterial coupling, with effects amplified by increased LVAD support.
- LVADs decrease RV afterload, boost RV ejection fraction, and improve RV ventriculo-arterial coupling.
- RV function improvements correlate inversely with the degree of interventricular septum shift, which increases with LVAD contribution.
Conclusions:
- LVADs positively influence both LV and RV function in pediatric patients.
- Understanding interventricular interaction is key to optimizing LVAD settings for pediatric populations.
- Development of algorithms for personalized LVAD management is warranted.
Abstract:
Left ventricular assist devices (LVADs) are used to bridge pediatric patients till transplantation. However, the LVADs effects on right ventricular (RV) function are controversial. This work aims at studying the ventricular interdependency in the presence of continuous (c-) and pulsatile (p-) flow LVAD in pediatric patients using a lumped parameter model including the representation of the septum. Five pediatric patients' data were used to simulate patients' baseline. The effects on LV and RV functions, energetics, preloads and afterloads of different c-LVAD speeds, p-LVAD rate, p-LVAD systole duration, p-LVAD filling and ejection pressures were simulated. c-LVAD and p-LVAD unload the LV decreasing the LV external work and improving the LV ventriculo-arterial coupling and these effects are more evident increasing the c-LVAD speed and the p-LVAD rate. Continuous-LVAD and p-LVAD decrease the RV afterload, increase the RV ejection fraction and improve the RV ventriculo-arterial coupling. The changes in RV function are inversely proportional to the degree of the interventricular septum leftward shift that increased by increasing the LVAD contribution. The study of the interventricular interaction could lead to the development of a dedicated algorithm to optimize LVAD setting in pediatric population.
