Method and apparatus for control of A-V interval
First Claim
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1. An electrical medical stimulator, comprising:
- electrode means for delivery of electrical stimulation to the fat pad associated with the AV node of a human heart;
means for sensing atrial and ventricular depolarizations of said human heart;
pulse generator means for generating stimulus pulses and for providing said stimulus pulses to said first electrode means;
means for sensing the rate at which said human heart is beating;
means for sensing the durations of the A-V conduction intervals of said human heartmeans for defining a desired A-V conduction interval range as a function of heart rate; and
control means responsive to said A-V interval sensing means for controlling operation of said pulse generator means to vary the duration of said A-V conduction intervals to fall within said desired interval range.
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Abstract
A device for controlling the duration of A-V conduction intervals in a patient'"'"'s heart. Stimulation of the AV nodal fat pad is employed to maintain the durations of the A-V conduction intervals within a desired interval range, which may vary as a function of sensed heart rate or other physiologic parameter. AV nodal fat pad stimulation may also be triggered in response to defined heart rhythms such as a rapid rate or the occurrence of PVC'"'"'s, to terminate or prevent induction of arrhythmias.
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Citations
15 Claims
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1. An electrical medical stimulator, comprising:
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electrode means for delivery of electrical stimulation to the fat pad associated with the AV node of a human heart; means for sensing atrial and ventricular depolarizations of said human heart; pulse generator means for generating stimulus pulses and for providing said stimulus pulses to said first electrode means; means for sensing the rate at which said human heart is beating; means for sensing the durations of the A-V conduction intervals of said human heart means for defining a desired A-V conduction interval range as a function of heart rate; and control means responsive to said A-V interval sensing means for controlling operation of said pulse generator means to vary the duration of said A-V conduction intervals to fall within said desired interval range. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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2. An electrical medical stimulator, comprising:
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electrode means for delivery of electrical stimulation to the fat pad associated with the AV node of a human heart; means for sensing atrial and ventricular depolarizations of said human heart; pulse generator means for generating stimulus pulses and for providing said stimulus pulses to said first electrode means; means for sensing the durations of the A-V conduction intervals of said human heart means for defining a desired A-V conduction interval range; and control means responsive to said A-V interval sensing means for controlling operation of said pulse generator means to vary the durations of said A-V conduction intervals to fall within said desired interval range.
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3. An electrical medical stimulator, comprising:
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electrode means for delivery of electrical stimulation to the fat pad associated with the AV node of a human heart; means for sensing atrial and ventricular depolarizations of said human heart; pulse generator means for generating stimulus pulses and for providing said stimulus pulses to said first electrode means; means for measuring a physiologic parameter indicative of the need for cardiac output; means for sensing the durations of the A-V conduction intervals of said human heart means for defining a desired A-V conduction interval range as a function of said physiologic parameter; control means responsive to said A-V interval sensing means for controlling operation of said pulse generator means to vary the durations of said A-V conduction intervals to fall within said desired interval range.
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Specification