Unipolar and bipolar lead cardiac pacemaker and method for inhibiting anode stimulation
First Claim
1. A method for biventricular pacing, the method comprising:
- a) supplying a pacing pulse to a unipolar lead adapted for stimulation of a left ventricle;
b) supplying a pace pulse to a second lead adapted for stimulation of a right ventricle;
c) configuring the second lead to provide an anode for the unipolar lead; and
d) constructing the pace pulse to the unipolar lead to comprise a trailing edge having slope of sufficiently small magnitude to inhibit capture of the right ventricle by anode break stimulation at the anode.
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Abstract
A multi-chamber implantable heart stimulation device is provided, adapted to inhibit anodal stimulation at a bipolar right chamber lead induced by a unipolar left chamber lead. The device includes a control unit adapted to provide to the unipolar left chamber lead a pace pulse having a trailing edge without a sharp cutoff. The control unit may be adapted to supply the pace pulse to the unipolar left chamber lead without a fast recharge period. The control unit may be adapted to supply to the unipolar left chamber lead a pace pulse having a trailing edge with a gradual decay, a ramp, steps, or a non-linear function. The control unit may be adapted to supply a different waveform to the bipolar right chamber lead than the pace pulse for the unipolar left chamber lead. For example, a conventional pacing pulse may be supplied to the bipolar right chamber lead.
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Citations
8 Claims
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1. A method for biventricular pacing, the method comprising:
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a) supplying a pacing pulse to a unipolar lead adapted for stimulation of a left ventricle; b) supplying a pace pulse to a second lead adapted for stimulation of a right ventricle; c) configuring the second lead to provide an anode for the unipolar lead; and d) constructing the pace pulse to the unipolar lead to comprise a trailing edge having slope of sufficiently small magnitude to inhibit capture of the right ventricle by anode break stimulation at the anode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification