First name
Last name
St Louis


Third Annual Pediatric Interagency Registry for Mechanical Circulatory Support (Pedimacs) Report: Pre-Implant Characteristics and Outcomes.

Year of Publication


Date Published

2019 Feb 25

ISSN Number



<p><strong>BACKGROUND: </strong>The influence of ventricular assist device (VAD) use in the care of children with end-stage heart failure is growing rapidly through increasing numbers, new devices, expanding indications, and improving outcomes. Pedimacs, a NIH-sponsored U.S. database, provides a platform to understand this emerging population.</p>

<p><strong>METHODS: </strong>Between 9/19/12-12/31/17, 30 hospitals implanted 508 devices in 423 patients under 19 years-of-age. This past year was one of evolution for the Database as its management was transitioned to the Society of Thoracic Surgery, therefore data from institutions not under contract by August 1 2018 was not included in this report.</p>

<p><strong>RESULTS: </strong>Of the 423 patients, the diagnosis was cardiomyopathy in 261 (62%), myocarditis in 48 (11%), other in 28 (7%) and congenital heart disease in 86 (20%) with 52 of these patients having single ventricle physiology. The two most common support strategies included LVAD-342 (81%) and BiVAD-64 (15%). Positive Outcome (alive on device or bridge to transplantation/recovery) was 80% at 6-months (overall mortality of 20%). The patient cohort for implantable continuous flow (IC) pumps (n=197) [age at implant 13.4+/-3.8yrs., 19% INTERMACS profile-1, 21% intubated at implant and 12% with CHD] was significantly different from the paracorporeal continuous flow (PC) pump cohort (n=79) [age 3.9+/-5.2yrs, 49% INTERMACS profile-1, 86% intubated at implant, and 38% with CHD] and the paracorporeal pulsatile (PP) pump cohort (n=121) [age 3.3+/-3.9yrs, 41% INTERMACS profile-1, 77 % intubated at implant, and 21% with CHD]. Consistent with their cohort composition, device type positive outcomes at 6 months were PC-63%, PP-77% and IC-92%. Using Parametric Hazard Modeling, an early hazard for death was associated with INTERMACS profile-1, BiVAD, percutaneous devices, PC devices, small volume institutions, low age and low weight, while a constant hazard was associated with intubation and liver dysfunction at time of implant.</p>

<p><strong>CONCLUSIONS: </strong>IC VADs are the most common VAD type placed in children. The positive outcomes for the IC VADs are &gt;90% at 6 months, which may represent our field's maturation in both patient selection and timing of implantation. Currently the PP/PC devices are limited to supporting our most challenging patients, those less than 20kg, and those with CHD. The introduction of new devices and our communities' commitment to shared learning and improvement will lead to more pediatric lives saved by VAD support, and will also focus on improving the quality of life of children supported with VADs.</p>



Alternate Title

Ann. Thorac. Surg.




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