Management of Heparin-Induced Thrombocytopenia Using Plasmapharesis in Patients Undergoing HeartMate 3 Left Ventricular Assist Device.

Heparin-induced thrombocytopenia (HIT) type-2 is a rare, but life-threatening complication that presents a unique challenge in patients undergoing cardiac surgery. Patients that require cardiac surgery with HIT present a dilemma between intraoperative anticoagulation, perioperative bleeding risk, and perioperative thrombotic events. We describe a case series of four patients who developed HIT in their hospital course before HeartMate 3 (HM3) left ventricular assist device implantation. Following a multidisciplinary approach, all patients did well intraoperatively with an approach of preoperative plasmapheresis, intraoperative unfractionated heparin (UFH), and postoperative conversion to bivalirudin with a bridge to warfarin. However, two patients had postoperative bleeding complications on bivalirudin. This case series details the therapeutic challenges encountered for HM3 implantation in patients with HIT and offers a therapeutic alternative to intraoperative bivalirudin in the effort to decrease perioperative complications in this challenging patient population.