The TandemHeart System is comprised of three sub-systems.

• The TandemHeart Pump provides the circulating power to pull oxygenated blood from the left atrium and to return it to the systemic arterial circulation.
   
• By way of two percutaneous access points in the patient's groin, the TandemHeart Cannula Set connects the pump to the body.
   
• The TandemHeart Controller provides operating power to the pump, provides a controlled flow of lubricant to the pump, and also provides automatic system monitoring and alarms indicating conditions that require attention.