Cardiac pacing and/or sensing lead and method of use
OwnerEliezer A. Astrinskyinventor
Life of this patent
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Abstract
A cardiac sensing and pacing lead primarily for transvenous insertion in the heart and connection to a pacemaker or other measuring or stimulating device. The lead includes a triple electrode configuration wherein three electrodes located axially along the lead are connected such that the two outer electrodes are electrically connected together and to a suitable input port, and the middle electrode is connected to the same input port forming a shielded bipolar sensing element which when inserted in the heart permits strong near field sensing and excellent far field rejection of electrical signals. Epicardial and myocardial lead versions of the above endocardial lead are also described.
Claims14
A method for sensing electrical signals associated with muscular depolarization in a chamber of a heart without sensing electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signals being sensed and for pacing the heart, said method comprising the steps of:
- pacing a chamber of a heart;
- providing sensing circuitry;
- placing a sensor assembly mounted on an endocardial lead and including three spaced apart ring electrodes connected to the sensing circuitry, into a heart chamber;
- sensing, with the middle one of the three ring electrodes relative to the outer two electrodes placed in the one heart chamber, electrical signals associated with muscular depolarization in the one heart chamber,
- connecting the two outer electrodes together and to the sensing circuitry and connecting the middle ring electrode to the sensing circuitry;
- rejecting with the equi-potential state of the two outer ring electrodes in the heart in the area of the middle ring electrode, electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signals being sensed, thereby to prevent such other electrical signals from being sensed by the middle ring electrode.
Apparatus for sensing electrical signals associated with muscular depolarization in a chamber of a heart without sensing electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signals being sensed and for pacing the heart, said apparatus comprising:
- sensing/pacing circuitry;
- an endocardial lead;
- a pacing electrode on said endocardial lead connected to said sensing/pacing circuitry;
- a sensor assembly including three spaced apart ring electrodes coupled to said sensing/pacing circuitry and mounted on said endocardial lead for placement in one chamber of a heart for sensing with the middle ring electrode, electrical signals in the one chamber of the heart, said electrical signals being associated with muscular depolarization in the one chamber, and
- rejecting means including said two outer ring electrodes connected together and to said sensing/pacing circuitry for rejecting, in the heart, electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signals being sensed, thereby to prevent such other electrical signals from being sensed by said middle ring electrode.
A method for sensing electrical signals associated with muscular depolarization in a chamber of a heart without sensing electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signal being sensed, said method comprising the steps of:
- providing sensing circuitry;
- placing a sensor assembly, mounted on an endocardial lead and including three spaced apart ring electrodes connected to the sensing circuitry, into a heart chamber;
- sensing, with the middle one of the three ring electrodes relative to the outer two electrodes placed in the one heart chamber, electrical signals associated with muscular depolarization in the one heart chamber,
- connecting the two outer electrodes together and to the sensing circuitry connecting the middle ring electrode to the sensing circuitry;
- rejecting with the equi-potential state of the two outer ring electrodes in the heart in the area of the middle ring electrode, electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signals being sensed, thereby to prevent such other electrical signals from being sensed by the middle ring electrode.
Apparatus for sensing electrical signals associated with muscular depolarization in a chamber of a heart without sensing electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signals being sensed and for pacing the heart, said apparatus comprising:
- sensing circuitry;
- an endocardial lead;
- a sensor assembly including three spaced apart ring electrodes coupled to said sensing circuitry and mounted on said endocardial lead for placement in one chamber of a heart for sensing with the middle ring electrode, electrical signals in the one chamber of the heart, said electrical signals being associated with muscular depolarization in the one chamber, and
- rejecting means including the two outer ring electrodes connected together and to said sensing circuitry for rejecting, in the heart, electrical signals (a) associated with muscular depolarization in other chambers of the heart or (b) otherwise extraneous to the electrical signals being sensed, thereby to prevent such other electrical signals from being sensed by said middle ring electrode.
Dependencies are inferred from the claim text.