The PediaFlow ventricular assist device is an implantable artificial heart that assists the native heart in infants. It under development and consists of a magnetically-levitated mixed-flow rotary pump and an optimized motor.ﾠ The control algorithms for levitation, sensorless motor control and physiologic interaction with the patient are intriguing problems for numerous reasons. In this seminar, the control engineering of the PediaFlow will be presented including actuator design, sensing, and the algorithms themselves. The high human and economic costs of developing such a device places high demands on predictive engineering models and analysis which are the focus of this seminar. This work is part of a team effort lead by the University of Pittsburgh and funded by the National Institutes of Health via Contract HHSN268200448192C (NO1-HV-48192), `Pediatric Circulatory Support.`