Introduction: Clinical Reality

  • F. Unger


Ventricular assist devices were first designed 30 years ago, at a time when open heart surgery posed a real challenge and the early postoperative mortality was near 10%. The designs of the pulsatile devices have not changed very much, being basically membrane pumps available in the form of a sac (Portner) or a moving diaphragm (Pierce, Unger, Frazier, Whalen) (Table 1). The driving source is either pneumatic or electromechanical via a tube through the skin. In the electromechanical driving mode, the incorporated devices need a compliance chamber. Furthermore, nonpulsatile blood pumps are also available.


Blood Pump Membrane Pump Total Artificial Heart Permanent Implantation Driving Source 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1995

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  • F. Unger

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