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Right ventricular dysfunction in children supported with pulsatile ventricular assist devices.

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Right ventricular dysfunction (RVD) affects 42% of pediatric ventricular assist device (VAD) recipients, with preoperative extracorporeal support and elevated urea being key risk factors for biventricular assist (BiVAD). Management of RVD in these children requires further study.

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Area of Science:

  • Pediatric cardiology
  • Cardiovascular surgery
  • Biomedical engineering

Background:

  • Right ventricular dysfunction (RVD) is a significant concern in pediatric patients requiring ventricular assist devices (VADs).
  • Understanding the incidence, risk factors, and outcomes of RVD is crucial for improving patient management.
  • Previous studies have not fully elucidated the preoperative characteristics associated with RVD in this population.

Purpose of the Study:

  • To determine the incidence and severity of RVD in pediatric VAD recipients.
  • To identify preoperative factors predicting RVD development.
  • To assess the impact of RVD on outcomes, including survival and postoperative morbidity.

Main Methods:

  • A retrospective analysis of pediatric patients bridged to transplantation with VADs between 2004 and 2011.
  • RVD was defined by specific criteria including central venous pressure, inotropic support, inhaled nitric oxide duration, or requirement for biventricular assist (BiVAD).
  • Preoperative variables were analyzed to identify associations with RVD and BiVAD requirement.

Main Results:

  • Of 57 pediatric VAD recipients, 42% (24 patients) developed RVD.
  • Younger age, prior extracorporeal mechanical support, and elevated urea, creatinine, and bilirubin levels were associated with RVD.
  • Elevated urea and extracorporeal mechanical support were significant risk factors for requiring BiVAD.

Conclusions:

  • RVD occurs in approximately 40% of pediatric VAD recipients, impacting peri-implantation morbidity and bridging outcomes.
  • Preoperative extracorporeal membrane oxygenation and elevated urea are identified risk factors for BiVAD.
  • Further research into the management of RVD in pediatric VAD patients is warranted.