System and method for providing hemodynamically optimal pacing therapy
First Claim
1. A rate-responsive pacemaker for providing pacing pulses to a patient'"'"'s heart in accordance with metabolic need, the pacemaker comprising:
- a cardiac wall motion sensor for providing signals representative of ventricular or cardiac wall motion;
a pulse generator for generating pacing pulses at a selectable rate;
a processor, coupled to the cardiac wall motion sensor and the pulse generator, for processing the cardiac wall motion sensor signals to derive physiologic parameters indicative of the patient'"'"'s level of metabolic need and for selecting the rate at which the pulse generator generates pacing pulses in accordance with the derived physiologic parameters.
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Accused Products
Abstract
A system and method for a pacemaker are provided, for using cardiac wall motion sensor signals to provide hemodynamically optimal pacing therapy to patient at rest, and for providing rate-responsive pacing therapy. The cardiac wall motion sensor signals are provided by an implantable lead that incorporates an accelerometer for measuring cardiac mechanical activity. The cardiac wall motion sensor signals are processed to derive cardiac wall velocity signals and cardiac wall displacement signals. The derived signals are further processed to derive physiologic parameters indicative of cardiac performance, including stroke volume, contractility, pre-ejection period, and ejection time. The physiological parameters, in turn, are used by the pacemaker to provide hemodynamically optimal pacing therapy at rest, and rate-responsive pacing therapy.
361 Citations
26 Claims
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1. A rate-responsive pacemaker for providing pacing pulses to a patient'"'"'s heart in accordance with metabolic need, the pacemaker comprising:
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a cardiac wall motion sensor for providing signals representative of ventricular or cardiac wall motion; a pulse generator for generating pacing pulses at a selectable rate; a processor, coupled to the cardiac wall motion sensor and the pulse generator, for processing the cardiac wall motion sensor signals to derive physiologic parameters indicative of the patient'"'"'s level of metabolic need and for selecting the rate at which the pulse generator generates pacing pulses in accordance with the derived physiologic parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A pacemaker for providing hemodynamically optimal pacing therapy to a patient'"'"'s heart, the pacemaker comprising:
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a cardiac wall motion sensor for generating signals representative of ventricular cardiac wall motion; a pulse generator for generating pacing pulses in accordance with pacing parameters; a processor, coupled to the cardiac wall motion sensor and the pulse generator, for processing the cardiac wall motion sensor signals to derive physiologic parameters indicative of cardiac performance and for optimally setting the pacing parameters in accordance with the physiologic parameters. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification