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Pacemaker mediated tachycardia detection and intervention

A tachycardia and pacemaker technology, applied in cardiac electrodes, cardiac stimulators, therapy, etc., can solve problems such as interruption and inappropriateness of CRT pacing

Active Publication Date: 2019-06-14
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High intrinsic frequency can lead to inappropriate PMT intervention (eg, prolonged post-ventricular atrial refractory period (PVARP) for one cycle), which can lead to a drop in heartbeat or interruption of CRT pacing

Method used

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  • Pacemaker mediated tachycardia detection and intervention
  • Pacemaker mediated tachycardia detection and intervention
  • Pacemaker mediated tachycardia detection and intervention

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] Embodiment 1 is a method of detecting pacemaker-mediated tachycardia (PMT) using an implantable medical device and adjusting parameters in response to detecting the PMT, the method comprising:

[0113] using a processor located in said implantable medical device,

[0114] (1) Measure the first Vp-As(VA1),

[0115] (2) lengthening the first perceived atrioventricular interval (SAV) for one heartbeat by up to 50 ms to a second SAV in response to measuring VA1,

[0116] (3) measure the second Vp-As (VA2),

[0117] (4) return to the third SAV,

[0118] (5) measure the third Vp-As (VA3),

[0119] (6) Determine whether VA1=VA2 and VA1=VA3,

[0120] (7) in response to determining whether VA1=VA2 and VA1=VA3, confirm the existence of PMT, and

[0121] (8) Adjusting the parameter in response to confirming the presence of the PMT.

Embodiment 2

[0122] Embodiment 2 is the method of embodiment 1, wherein the parameter being adjusted is prolonged post-ventricular atrial refractory period (PVARP).

Embodiment 3

[0123] Embodiment 3 is the method of embodiment 2 or 3, wherein PVARP is prolonged.

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Abstract

A method of employing an implantable medical device to detect pacemaker mediated tachycardia (PMT) and adjusting a parameter (e.g. PVARP) in response to confirmation of the PMT. The method comprises,with a processor located in the implantable medical device, (1) measuring a first Vp-As (VA1), (2) lengthening SAV by 50ms for 1 beat in response to measuring VA1, (3) measuring a second Vp-As (VA2),(4) returning to a normal SAV, (5) measuring a third Vp-As (VA3), (6) determining whether VA1=VA2 and VA1=VA3, (7) in response to determining whether VA1=VA2 and VA1=VA3, confirming presence of PMT, and (8) in response to confirming presence of PMT, PVARP is extended.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 414,375, filed October 28, 2016, and U.S. Provisional Application No. 62 / 468,319, filed March 7, 2017. The disclosure of the above application is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates to the detection of pacemaker-mediated tachycardia (PMT), and more particularly, to adjusting the operation of implantable devices to eliminate, terminate, or reduce PMT. Background technique [0004] Pacemaker-mediated tachycardia (PMT), also known as endless loop tachycardia, occurs when a cardiac pacemaker paces the ventricles at an inappropriately fast rate for a sustained period of time. PMT occurs when a ventricular event occurs at a time during which the connective tissue between the atrium and ventricle can transmit retrograde electrical signals from ventricle to atrium. The conduction o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/362A61N1/05A61N1/368A61N1/365
CPCA61N1/056A61N1/36507A61N1/3682A61N1/3622A61N1/365
Inventor E·A·希林R·A·贝特佐德G·R·赫尔
Owner MEDTRONIC INC
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