CardiacAssist, Inc. ( CardiacAssist ), is a privately-held medical device company. The company is engaged in development, manufacture and marketing of cardiac assist devices for the healthcare markets. The company incorporated its own proprietary platform technology to provide a short-term circulatory support system for cardiologists and cardiac surgeons. The major product of CardiacAssist is the TandemHeart System which is an extracorporeal circulatory support system that restores blood circulation through a rapid cardiac catheterization procedure. The system is used in operating rooms to provide reliable temporary circulatory support for critically ill patients. The company is headquartered in Pennsylvania , the US.