Identifying heart failure patients suitable for resynchronization therapy using QRS complex width from an intracardiac electrogram
First Claim
1. A method for determining whether a patient is a responder to resynchronization therapy, the method comprising:
- detecting a beginning of an intrinsic ventricular depolarization with an electrode positioned at a ventricle of the heart of the patient;
detecting an ending of the intrinsic ventricular depolarization;
measuring an interval between the beginning of the intrinsic ventricular depolarization and the ending of the intrinsic ventricular depolarization;
comparing the interval to a threshold; and
when the interval is greater than the threshold, setting a paced atrio-ventricular delay of the heart stimulation device to less than an intrinsic atrio-ventricular delay of the patient.
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Abstract
Methods and systems are disclosed for determining whether a patient is a responder to cardiac resynchronization therapy. The beginning and ending of the intrinsic ventricular depolarization are determined through signals measured from one or more electrodes implanted in the patient'"'"'s heart. An interval between the beginning and ending of the intrinsic ventricular depolarization is computed and is compared to a threshold. The threshold may be determined empirically. The pacing parameters of a heart stimulation device, such as a pacemaker, may then be configured, for example, by setting the paced atrio-ventricular delay based on whether the patient responds positively to cardiac resynchronization therapy.
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Citations
43 Claims
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1. A method for determining whether a patient is a responder to resynchronization therapy, the method comprising:
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detecting a beginning of an intrinsic ventricular depolarization with an electrode positioned at a ventricle of the heart of the patient;
detecting an ending of the intrinsic ventricular depolarization;
measuring an interval between the beginning of the intrinsic ventricular depolarization and the ending of the intrinsic ventricular depolarization;
comparing the interval to a threshold; and
when the interval is greater than the threshold, setting a paced atrio-ventricular delay of the heart stimulation device to less than an intrinsic atrio-ventricular delay of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for determining whether a patient is a responder to resynchronization therapy, the system comprising:
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an electrode adapted to be positioned at a ventricle of the heart of the patient;
a detection module communicatively linked to the electrode, wherein the detection module detects a beginning of an intrinsic ventricular depolarization and an ending of the intrinsic ventricular depolarization; and
a processing module communicatively linked to the detection module, wherein the processing module computes an interval between the beginning of the intrinsic ventricular depolarization and the ending of the intrinsic ventricular depolarization and compares the interval to a threshold. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A system for determining whether a patient is a responder to resynchronization therapy, the system comprising:
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means for detecting a beginning of an intrinsic ventricular depolarization and an ending of the intrinsic ventricular depolarization; and
means for computing an interval between the beginning of the intrinsic ventricular depolarization and the ending of the intrinsic ventricular depolarization and for comparing the interval to a threshold. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification