Clinical outcomes in pediatric patients implanted with Thoratec ventricular assist device

J Donald Hill1, Olaf Reinhartz

  • 1Department of Surgery, Division of Cardiothoracic Surgery, University of California, San Francisco, CA 94143, USA. hilld@surgery.ucsf.edu

Insights

The Thoratec ventricular assist device (VAD) shows promising survival rates for pediatric patients with heart conditions like cardiomyopathy and myocarditis. However, survival is significantly lower for children with congenital heart disease.

Area of Science:

  • Pediatric Cardiology
  • Mechanical Circulatory Support
  • Cardiac Surgery

Background:

  • Mechanical circulatory support (MCS) devices are primarily designed for adults, limiting their application in pediatric populations.
  • Pediatric heart failure necessitates advanced treatment options, including ventricular assist devices (VADs).

Purpose of the Study:

  • To evaluate the complication rates and survival outcomes of pediatric patients receiving the Thoratec ventricular assist device (VAD).
  • To analyze survival data based on underlying etiologies and patient size.

Main Methods:

  • Data were collected from the Thoratec Corporation's voluntary registry, including 209 pediatric patients (ages 5-18) implanted with the Thoratec VAD by January 2005.
  • Patient characteristics (age, weight, body surface area) and etiologies (cardiomyopathy, myocarditis, congenital heart disease) were recorded.
  • Survival to transplantation or native heart recovery was analyzed, with subgroup analysis for different etiologies and smaller children (body surface area <1.3 m2).

Main Results:

  • Overall survival to transplantation or native heart recovery was 68.4% across 209 pediatric patients.
  • Survival rates varied significantly by etiology: 74.1% for cardiomyopathy, 86.0% for acute myocarditis, and 27.3% for congenital heart disease.
  • Survival in smaller children (body surface area <1.3 m2) was 51.7%, with a higher incidence of congenital heart disease.

Conclusions:

  • The Thoratec VAD can be successfully applied to pediatric patients, offering a viable support option for heart failure.
  • Outcomes are strongly influenced by the underlying cardiac condition, with congenital heart disease posing a significant challenge.
  • Further research is needed to optimize VAD therapy for pediatric populations, particularly those with complex congenital defects.

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