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Updated: Aug 9, 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
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.
Abstract:
Most mechanical circulatory support devices are designed for adult patients; however, some can be successfully applied to pediatric patients. The rates of complications and patient survival to transplant or native heart recovery after implantation of the Thoratec ventricular assist device (VAD) (Thoratec Corp, Pleasanton, CA) in children and adolescents were determined from the company's voluntary registry. As of January 2005, 209 patients (mean age 14.5 years; range 5 to 18 years) have been supported with the Thoratec VAD. Mean patient weight was 57 kg (range, 17 to 118 kg), and patients had a mean body surface area of 1.6 m2 (range, 0.73 to 2.3 m2). The major etiologies necessitating VAD support included cardiomyopathy (55.0%), acute myocarditis (25.4%), and end-stage congenital heart disease (5.8%). Mean duration of VAD support was 44 days (range, 0 to 434 days). Patient survival to transplantation or native heart recovery was 68.4%. Patients with cardiomyopathy and acute myocarditis had 74.1% and 86.0% survival, respectively, with only 27.3% survival in patients having congenital heart disease. The overall survival rate in smaller children (body surface area, <1.3 m2) was similar at 51.7%, although the incidence of congenital heart disease was higher.
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