×

Verification of capture by sensing evoked response across cardioversion electrodes

  • US 5,683,431 A
  • Filed: 03/27/1996
  • Issued: 11/04/1997
  • Est. Priority Date: 03/27/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A cardiac pacemaker/defibrillator system operable in a threshold determination operation for determining a stimulation threshold of the heart comprising:

  • a defibrillation lead system having at least one defibrillation electrode adapted to be positioned in relation to a patient'"'"'s heart;

    a pacing lead system having at least one pace/sense electrode pair adapted to be positioned in relation to a patient'"'"'s heart;

    sense amplifier means adapted to be coupled to said pacing lead system for sensing occurrences of electrical depolarizations of the heart using said pace/sense electrode pair and providing a sense output signal in response thereto indicative of an occurrence of a depolarization;

    means responsive to said sense amplifier means for measuring time intervals separating sense output signals;

    means responsive to said measuring means for detecting occurrences of tachyarrhythrnias based on said measured intervals;

    means operable in a threshold determination operation for coupling a threshold sensing electrode pair including at least one defibrillation electrode to said sense amplifier means;

    pacing pulse generator means operable in the threshold determination operation for delivering pacing pulses at a stimulation threshold test energy level to the patient'"'"'s heart through the pacing lead system and at least one pace/sense electrode; and

    means responsive to a sense output signal of the sense amplifier means for determining capture of the patient'"'"'s heart by a pacing pulse delivered at the stimulation threshold test energy level.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×