Method of adjusting an AV and/or PV delay to improve hemodynamics and corresponding implantable stimulation device
First Claim
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1. A method of setting an atrioventricular delay between an atrial event and stimulation of a ventricle, the method comprising:
- providing stimulation pulses to the ventricle at a plurality of different atrioventricular delays after respective atrial events;
acquiring electrical heart activity data resulting from the applied stimulation pulses;
processing the electrical heart activity data to determine an atrioventricular delay that results in a fusion beat; and
setting an atrioventricular delay value to a particular value based on the atrioventricular delay so as to achieve fusion;
wherein processing the electrical heart activity comprises comparing at least one parameter from each set of data to determine which of the sets displays the strongest degree of fusion.
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Abstract
Methods and apparatus are provided for adjusting the AV/PV delay of an implantable stimulation device so as to achieve fusion of an externally provided ventricular stimulus with the patient'"'"'s own intrinsic depolarization.
59 Citations
37 Claims
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1. A method of setting an atrioventricular delay between an atrial event and stimulation of a ventricle, the method comprising:
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providing stimulation pulses to the ventricle at a plurality of different atrioventricular delays after respective atrial events;
acquiring electrical heart activity data resulting from the applied stimulation pulses;
processing the electrical heart activity data to determine an atrioventricular delay that results in a fusion beat; and
setting an atrioventricular delay value to a particular value based on the atrioventricular delay so as to achieve fusion;
wherein processing the electrical heart activity comprises comparing at least one parameter from each set of data to determine which of the sets displays the strongest degree of fusion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of setting an atrioventricular delay between an atrial event and stimulation of a ventride, the method comprising:
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adjusting the atrioventricular delay until an evoked response from the ventricle indicates a fusion beat;
comparing at least one parameter from each evoked response to determine which of the evoked responses displays the strongest degree of fusion; and
setting the atrioventricular delay to a value based on the atrioventicular delay that results in the strongest degree of fusion so as to achieve fusion. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A system for setting an atrioventricular delay between an atrial event and stimulation of a ventricle, the system comprising:
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a stimulation generator that is operative to generate stimulation pulses to be delivered to the ventricle;
circuitry in communication with the stimulation generator, the circuitry being operative to control the stimulation generator to produce stimulation pulses at a plurality of different atrioventricular delays after respective atrial events;
a sensor that is operative to acquire electrical heart activity data resulting from the applied stimulation pulses;
wherein the circuitry is in communication with the sensor and is operative to process the electrical heart activity data to determine an atrioventricular delay that results in a fusion beat, wherein processing the electrical heart activity data comprises comparing at least one parameter from each set of data to determine which of the sets displays the strongest degree of fusion, and wherein the circuitry is operative to set the atrioventricular delay value to a value based on the atrioventricular delay that results in the strongest degree of fusion so as to achieve fusion. - View Dependent Claims (23, 24, 25)
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26. A method of setting at least one of an AV delay and a PV delay in an implantable stimulation device, wherein the method comprises
acquiring evoked response data for a plurality of delays for at least one of AV delays and PV delays; -
comparing the data and determining a given one of the delays whose data displays the most evidence of fusion; and
setting a current delay to the delay that displayed the most evidence of fusion;
wherein comparing the data comprises comparing integral values of evoked responses with one another and determining the delay displaying the most evidence of fusion by finding a smallest one of the integral values. - View Dependent Claims (27)
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28. A method of biventricular pacing comprising:
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providing stimulation pulses to a right ventricle at a plurality of different atrioventricular delays after respective sensed events in the right atrium;
providing stimulation pulses to a left ventricle at a plurality of different atrioventricular delays after respective sensed events in the left atrium;
acquiring electrical heart activity data resulting from the applied stimulation pulses;
processing the electrical heart activity data to determine atrioventricular delays that result in fusion beats in the right and left ventricles; and
setting a left atrioventricular delay value and a right atrioventricular delay value to particular values based on the respective atrioventricular delays so as to achieve fusion in the left and right ventricles. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification