Rate smoothing to enhance atrial synchronous pacing in a ventricular pacemaker

A pacemaker, ventricular technology, applied in the direction of cardiac stimulators, applications, sensors, etc.

Pending Publication Date: 2020-11-27
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While single-chamber ventricular sensing and pacing by an intracardiac ventricular pacemaker may be sufficient to resolve some heart rhythm conditions, some patients may start from the atria and ventricles used to provide atrial-synchronized ventricular pacing in order to maintain a more normal heart rhythm ( dual chamber) to benefit from sensing

Method used

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  • Rate smoothing to enhance atrial synchronous pacing in a ventricular pacemaker
  • Rate smoothing to enhance atrial synchronous pacing in a ventricular pacemaker
  • Rate smoothing to enhance atrial synchronous pacing in a ventricular pacemaker

Examples

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Embodiment Construction

[0021] In general, this disclosure describes techniques for controlling ventricular pacing, generally referred to as "rate smoothing," for avoiding sudden changes in ventricular rate and promoting atrial-synchronous ventricular pacing. In the illustrative examples presented herein, an intracardiac ventricular pacemaker is configured to sense atrial systolic events for use in synchronizing ventricular pacing pulses with atrial rate. As described below, atrial systolic events can be sensed from signals generated by the motion sensor, including atrial systolic event signals corresponding to phases of mechanical atrial contraction and active ventricular filling, sometimes referred to as "atrial expelling". In other examples, atrial systolic event sensing may be performed using other techniques, such as sensing an atrial systolic event from another cardiac mechanical signal (e.g., pressure signal, acoustic signal, impedance signal, etc.) Polarized P waves of the heart's electrical ...

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Abstract

A ventricular pacemaker is configured to determine a ventricular rate interval by determining at least one ventricular event interval between two consecutive ventricular events and determine a rate smoothing ventricular pacing interval based on the ventricular rate interval. The pacemaker is further configured to detect an atrial event from a sensor signal and deliver a ventricular pacing pulse inresponse to detecting the atrial event from the sensor signal. The pacemaker may start the rate smoothing ventricular pacing interval to schedule a next pacing pulse to be delivered upon expiration of the rate smoothing ventricular pacing interval.

Description

technical field [0001] The present disclosure relates to a ventricular pacemaker and method for controlling ventricular pacing pulse timing for facilitating atrial-synchronous ventricular pacing. Background technique [0002] Implantable cardiac pacemakers are often placed in a subcutaneous pocket and are coupled to one or more transvenous medical electrical leads carrying pacing and sensing electrodes positioned in the heart. A subcutaneously implanted cardiac pacemaker may be a single-chamber pacemaker or a dual-chamber pacemaker coupled to one of the electrodes used to position electrodes in one of the heart chambers (atrium or ventricle). Transvenous medical leads, the dual chamber pacemaker is coupled to two transvenous intracardiac leads for positioning electrodes in both the atrial and ventricular chambers. Multi-chamber pacemakers are also available, which may be coupled to, for example, three leads for positioning electrodes for pacing and sensing in one atrial cha...

Claims

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Application Information

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IPC IPC(8): A61N1/365A61N1/362A61N1/368
CPCA61N1/3627A61N1/36507A61N1/36542A61N1/36578A61N1/36585A61N1/3688A61N1/37205A61N1/37512A61N1/3756A61B5/0031A61N1/3682A61B5/287A61N1/3622A61N1/3706A61N1/36592A61B5/352
InventorT·J·谢尔登W·M·戴默V·P·加尼恩J·E·普罗诺维奇V·E·斯普莱特M·邢
OwnerMEDTRONIC INC