The field of pediatric mechanical circulatory support with ventricular assist devices has lagged significantly behind that of adult patients. However, there is increasing attention on the emerging field of pediatric ventricular assist device support. In this review, part of the Pediatric Cardiac Intensive Care Society/Extracorporeal Life Support Organization Joint Consensus Statement on Mechanical Circulatory Support, we discuss several important aspects of pediatric ventricular assist device, focusing on biomechanics and selection of the most appropriate device.