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Implantable haemodynamically responsive cardioverting/defibrillating pacemaker

  • US 5,184,614 A
  • Filed: 10/19/1990
  • Issued: 02/09/1993
  • Est. Priority Date: 10/19/1990
  • Status: Expired due to Term
First Claim
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1. An implantable device for the treatment of tachyarrhythmia malfunctions of a patient'"'"'s heart, said device including a first sensing means for sensing an electrical function in the patient'"'"'s heart and providing a first signal representative of said electrical function, a second sensing means for sensing an haemodynamic function in the patient'"'"'s heart and providing a second signal representative of said haemodynamic function, said second signal comprising either a ventricular filtered-peak-to-peak pressure amplitude, "VFPPA", or a ventricular peak pressure function, "VPPF", analyzing means primarily responsive to the signal from one of said sensing means for analyzing the state of the heart'"'"'s function and providing any required electrical shock therapy to the heart, detecting means for detecting uncertainty in regard to the therapy to be provided to the heart by said analyzing means, and controlling means responsive to said uncertainty and operative to change the primary responsiveness of said analyzing means to the signal provided by the other of said sensing means for controlling the therapy that is to be provided to the heart.

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