Method and apparatus for treatment of fibrillation
First Claim
1. A cardiac stimulator comprising:
- a lead system carrying a plurality of stimulation electrodes adapted to be located at multiple sites adjacent tissue of a patient'"'"'s heart;
stimulation pulse generators coupled to deliver stimulation pulses to said stimulation electrodes;
depolarization sensors responsive to depolarizations of cardiac tissues at said sites;
means responsive to said depolarization sensors for determining exitable gaps of tissue at said sites associated with depolarizations at said sites and associated with stimulation pulses delivered to said sites by said stimulation electrodes;
means for calculating stimulus pulse delivery times at variable delivery times within said determined exitable gaps at said sites to cause convergence of depolarization cycles at said sites over a series of delivered stimulation pulses; and
control means for triggering said pulse generators to deliver stimulation pulses to said stimulation electrodes at said calculated times.
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Accused Products
Abstract
A cardiac stimulator and a method of its use. The stimulator includes a lead system carrying a stimulation electrodes adapted to be located at multiple sites adjacent tissue of a patient'"'"'s heart and is provided with stimulation pulse generators coupled to deliver stimulation pulses to the stimulation electrodes. The stimulator further includes depolarization sensors responsive to depolarizations of cardiac tissues at the tissue sites and, responsive to sensed depolarizations and stimulation pulses delivered to said sites by said stimulation electrodes determines exitable gaps of tissue at the sites. The stimulator calculates stimulus pulse delivery times at variable delivery times within the determined exitable gaps at the tissue sites to cause convergence of depolarization cycles at the tissue sites over a series of delivered stimulation pulses and delivers stimulation pulses to the stimulation electrodes at the calculated variable delivery times.
67 Citations
16 Claims
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1. A cardiac stimulator comprising:
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a lead system carrying a plurality of stimulation electrodes adapted to be located at multiple sites adjacent tissue of a patient'"'"'s heart; stimulation pulse generators coupled to deliver stimulation pulses to said stimulation electrodes; depolarization sensors responsive to depolarizations of cardiac tissues at said sites; means responsive to said depolarization sensors for determining exitable gaps of tissue at said sites associated with depolarizations at said sites and associated with stimulation pulses delivered to said sites by said stimulation electrodes; means for calculating stimulus pulse delivery times at variable delivery times within said determined exitable gaps at said sites to cause convergence of depolarization cycles at said sites over a series of delivered stimulation pulses; and control means for triggering said pulse generators to deliver stimulation pulses to said stimulation electrodes at said calculated times. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of cardiac stimulation, comprising:
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locating a plurality of stimulation electrodes at multiple sites adjacent tissue of a patient'"'"'s heart; sensing depolarizations of cardiac tissues at said sites; and delivering stimulation pulses to said sites; and wherein said pulse delivering step comprises; determining exitable gaps of tissue at said sites associated with depolarizations at said sites and associated with stimulation pulses delivered to said sites; calculating stimulus pulse delivery times at variable delivery times within said determined exitable gaps at said sites to cause convergence of depolarization cycles at said sites over a series of delivered stimulation pulses; and delivering stimulation pulses to said stimulation electrodes at said calculated times. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification