SYSTEMS AND METHODS FOR USE BY AN IMPLANTABLE MEDICAL DEVICE FOR CONTROLLING MULTI-SITE CRT PACING IN THE PRESENCE OF ATRIAL TACHYCARDIA
First Claim
1. A method for use by an implantable cardiac rhythm management device equipped to selectively deliver multi-site left ventricular (MSLV) pacing within a patient, the method comprising:
- delivering non-simultaneous MSLV pacing to the heart of the patient within a tracking mode;
assessing the atrial rate of the patient; and
comparing an atrial rate against an atrial tachycardia assessment rate threshold (ATAR) and, if the atrial rate exceeds the ATAR threshold, switching from non-simultaneous MSLV pacing to one of substantially simultaneous MSLV pacing and single-site LV pacing to facilitate recognition of organized atrial arrhythmias (OATs).
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods are provided for use by implantable medical devices equipped to deliver multi-site left ventricular (MSLV) pacing. Sequential MSLV is associated with a relatively long post-ventricular atrial blanking (PVAB) period that might limit the detection of pathologic rapid organized atrial tachycardias (OAT). In one example, sequential MSLV cardiac resynchronization therapy (CRT) pacing is delivered within a tracking mode. A possible atrial tachycardia is detected based on the atrial rate exceeding an atrial tachycardia assessment rate (ATAR) threshold. The device then switches to either single-site LV pacing or simultaneous MSLV pacing, thereby effectively shortening the PVAB to detect additional atrial events that might otherwise be obscured, and thereby permitting the device to more reliably distinguish OATs (such as atrial flutter) from sinus tachycardia. The device may also employ an automatic mode switch (AMS) threshold set higher than the ATAR threshold for use in switching from tracking modes to nontracking modes.
-
Citations
25 Claims
-
1. A method for use by an implantable cardiac rhythm management device equipped to selectively deliver multi-site left ventricular (MSLV) pacing within a patient, the method comprising:
-
delivering non-simultaneous MSLV pacing to the heart of the patient within a tracking mode; assessing the atrial rate of the patient; and comparing an atrial rate against an atrial tachycardia assessment rate threshold (ATAR) and, if the atrial rate exceeds the ATAR threshold, switching from non-simultaneous MSLV pacing to one of substantially simultaneous MSLV pacing and single-site LV pacing to facilitate recognition of organized atrial arrhythmias (OATs). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A system for use by an implantable cardiac rhythm management device equipped to selectively deliver multi-site left ventricular (MSLV) pacing within a patient, the system comprising:
-
a single-site LV/MSLV pacing controller operative to control the delivery of pacing to the heart of the patient in one of a single-site LV pacing mode, a substantially simultaneous MSLV pacing mode and a non-simultaneous MSLV pacing mode; and an atrial tachycardia detection system operative to detect a possible atrial tachycardia during non-simultaneous MSLV pacing based on an atrial tachycardia assessment rate (ATAR) threshold;
withthe pacing controller operative to switch from non-simultaneous MSLV pacing to one of the substantially simultaneous MSLV pacing mode and the single-site LV pacing mode while continuing in the tracking mode if the atrial rate exceeds the ATAR threshold.
-
-
25. A system for use by an implantable cardiac rhythm management device equipped to selectively deliver multi-site left ventricular (MSLV) pacing within a patient, the system comprising:
-
means for delivering non-simultaneous MSLV pacing to the heart of the patient within a tracking mode; means for assessing the atrial rate of the patient; and means for comparing an atrial rate against an atrial tachycardia assessment rate threshold (ATAR) and, if the atrial rate exceeds the ATAR threshold, switching from non-simultaneous MSLV pacing to one of a substantially simultaneous MSLV pacing and single-site LV pacing to enable recognition of organized atrial arrhythmias (OATs).
-
Specification