×

Heart stimulator with an evoked response detector

  • US 6,029,088 A
  • Filed: 09/29/1998
  • Issued: 02/22/2000
  • Est. Priority Date: 10/02/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A heart stimulator comprising:

  • a pulse generator which emits stimulation pulses of various amplitudes, said stimulation pulses including one of said stimulation pulses having an amplitude U1stim which is sufficiently high for obtaining safe capture and another of said stimulation pulses having an amplitude U2stim which is less than U1stim ;

    a lead connected to said pulse generator and adapted for implantation in a subject to deliver said stimulation pulses to cardiac tissue in said subject and to pick up successive electrode signals respective produced by cardiac tissue in response to said stimulation pulses, said electrode signals thus being respectively associated with said stimulation pulses, and each of said electrode signals comprising a signal component which is substantially proportional to the amplitude of the associated stimulation pulse and an evoked response component which is independent of the amplitude of the associated stimulation pulse;

    measuring and memory means for measuring and storing a measured amplitude U1meas for the electrode signal associated with said one of said stimulation pulses having the amplitude U1stim and a measured amplitude U2meas for the electrode signal associated with the other of said stimulation pulses having the amplitude U2stim ; and

    analyzer means supplied with U1stim, U2stim, U1meas and U2meas for detecting an evoked response signal from a predetermined relation among U1stim, U2stim, U1meas and U2meas.

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