|Volume-Displacement Pumps(First-Generation Devices)||Rotary Blood Pumps (Second-Generation Devices)|
|Axial Flow Pumps||Centrifugal Flow Pumps|
|Method of displacement||Pulsatile chamber or sac that fills passively or by suction and is compressed by external pusher plate||Continuous flow driven by a spinning rotor around a central shaft||Continuous flow driven by a hydrodynamic or electromagnetic suspended spinning rotor|
|Blood pressure||Cyclic, pulsatile flow||Constant, nonpulsatile flow||Constant, nonpulsatile flow|
|Valve||Inflow and outflow prosthetic valves||No valves||No valves|
|Devices implanted during cardiac surgery||HeartMate XVE, Novacor, Thoratec PVAD or IVAD, Abiomed 5000, LionHeart⁎||HeartMate II, Jarvik 2000,⁎MicroMed DeBakey,⁎Incor⁎||VentrAssist,⁎HVAD,⁎Terumo Dura Heart,⁎HeartWare,⁎HeartQuest,⁎MTIHeart LVAD⁎|
HVAD = HeartWare ventricular assist device; IVAD = implantable ventricular assist device; LVAD = left ventricular assist device; PVAD = paracorporeal ventricular assist device.
↵⁎ Investigational (not approved by the U.S. Food and Drug Administration) devices.