Heart transplantation in children after mechanical circulatory support with pulsatile pneumatic assist device

Area of Science:

• Pediatric Cardiology
• Cardiovascular Surgery
• Transplantation Medicine

Background:

• Mechanical circulatory support using pulsatile pneumatic ventricular assist devices (VADs) is a critical intervention for children with severe cardiogenic shock.
• The long-term impact of VAD support on survival following heart transplantation (HTx) in pediatric patients requires further investigation.

Purpose of the Study:

• To evaluate the safety and efficacy of using pulsatile pneumatic VADs as a bridge to heart transplantation in children.
• To compare early and long-term survival rates and clinical outcomes in pediatric patients undergoing HTx after VAD support versus other pre-transplant management strategies.

Main Methods:

• A retrospective review of 95 pediatric patients who underwent heart transplantation.
• Patients were categorized into three groups: elective HTx (Group A), emergency HTx without VAD (Group B), and VAD-supported HTx (Group C).
• Comparison of survival rates, neurologic outcomes, acute cardiac rejection, and transplant failure across the groups.

Main Results:

• Overall 5-year survival after HTx was 78%, with no significant differences among the three groups (Group A: 80%, Group B: 79%, Group C: 72%).
• Pediatric patients with cardiomyopathy showed significantly better survival rates compared to those with congenital heart defects (p = 0.014).
• No significant differences were observed in neurologic outcomes, acute cardiac rejection, or transplant failure between the groups.

Conclusions:

• Bridging to heart transplantation with a pulsatile pneumatic VAD is a safe and effective strategy for pediatric patients with end-stage heart failure.
• Survival following HTx in VAD-supported pediatric patients is comparable to those bridged with inotropes or awaiting transplantation electively.