Optimization method for cardiac resynchronization therapy
First Claim
1. A method for determining the effectiveness of cardiac resynchronization therapy while stimulating a patient'"'"'s heart at different locations during an electrophysiology study, comprising the steps of:
- (a) collecting seismocardiographic (SCG) data corresponding to heart motion during paced beats of said patient'"'"'s heart;
(b) collecting seismocardiographic (SCG) data corresponding to heart motion during un- paced beats of said patient'"'"'s heart;
(c) determining hemodynamic and electrophysiological parameters based on the SCG data of steps (a) and (b); and
(d) determining whether cardiac performance is improved by comparing said hemodynamic and electrophysiological parameters generated by step (a) with those generated by step (b).
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Abstract
The patterns of contraction and relaxation of the heart before and during left ventricular or biventricular pacing are analyzed and displayed in real time mode to assist physicians to screen patients for cardiac resynchronization therapy, to set the optimal A-V or right ventricle to left ventricle interval delay, and to select the site(s) of pacing that result in optimal cardiac performance. The system includes an accelerometer sensor; a programmable pace maker, a computer data analysis module, and may also include a 2D and 3D visual graphic display of analytic results, i.e. a Ventricular Contraction Map. A feedback network provides direction for optimal pacing leads placement. The method includes selecting a location to place the leads of a cardiac pacing device, collecting seismocardiographic (SCG) data corresponding to heart motion during paced beats of a patient'"'"'s heart, determining hemodynamic and electrophysiological parameters based on the SCG data, repeating the preceding steps for another lead placement location, and selecting a lead placement location that provides the best cardiac performance by comparing the calculated hemodynamic and electrophysiological parameters for each different lead placement location.
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Citations
23 Claims
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1. A method for determining the effectiveness of cardiac resynchronization therapy while stimulating a patient'"'"'s heart at different locations during an electrophysiology study, comprising the steps of:
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(a) collecting seismocardiographic (SCG) data corresponding to heart motion during paced beats of said patient'"'"'s heart; (b) collecting seismocardiographic (SCG) data corresponding to heart motion during un- paced beats of said patient'"'"'s heart; (c) determining hemodynamic and electrophysiological parameters based on the SCG data of steps (a) and (b); and (d) determining whether cardiac performance is improved by comparing said hemodynamic and electrophysiological parameters generated by step (a) with those generated by step (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for selecting an optimal placement of leads of a cardiac pacing device for cardiac resynchronization therapy during implantation comprising the steps of:
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(a) selecting a lead placement location to place a lead of said cardiac pacing device; (b) collecting seismocardiographic (SCG) data corresponding to heart motion during paced beats of a patient'"'"'s heart; (c) determining hemodynamic and electrophysiological parameters based on the SCG data of step (b); (d) repeating steps (a)–
(c) for other lead placement locations for said cardiac pacing device; and(e) selecting a lead placement location that provides a best cardiac performance by comparing said hemodynamic and electrophysiological parameters of step (c) for each different lead placement location. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A system that selects an optimal placement of leads of a cardiac pacing device for cardiac resynchronization therapy during implantation, comprising:
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a cardiac pacing device with leads implanted into a patient'"'"'s heart; means for collecting seismocardiographic (SCG) data corresponding to heart motion during paced beats of said patient'"'"'s heart; means for determining hemodynamic and electrophysiological parameters based on said SCG data; and a processing device that compares said hemodynamic and electrophysiological parameters; wherein the optimal placement of leads of said cardiac pacing device is determined by comparing said hemodynamic and electrophysiological parameters for different lead placement locations. - View Dependent Claims (21, 22, 23)
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Specification