A method for improving the anti-interference performance of the atrial interference detection window of a dual-chamber pacemaker
A dual-chamber pacemaker and interference detection technology, applied in electrotherapy, cardiac stimulators, therapy, etc., can solve the problem of increasing power consumption, increasing the complexity of hardware devices and algorithms, and affecting the service life of battery-powered implantable devices, etc. problems, to achieve the effects of suppressing influence, reducing the risk of misperception, and ensuring reliability
Active Publication Date: 2019-02-15
SHAANXI QINMING MEDICAL CO LTD
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[0006] Existing patents (Yonce D J, Babler L.EMI detection for implantable medicaldevices: US, US 7231251 B2[P].2007.) have added magnetic sensors to judge electromagnetic noise. This design increases the complexity of hardware devices and algorithms, and also Greatly increased power consumption, affecting the service life of battery-powered implantable devices; another patent (Whigham R H. Pacemaker noise rejection system: US, US4779617[P].1988.) sets the algorithm to automatically extend PVARP without increasing Additional hardware and can remove most types of interference
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0026] The setting of the interference detection window in the prior art is as follows: figure 2 As shown, a ventricular pacing event Vp or a ventricular sensing event Vs triggers the post-ventricular atrial blank period PVAB and the post-ventricular atrial refractory period PVARP of the atrial channel; the pacemaker does not respond to signals falling into the post-ventricular atrial blank period PVAB, It does not affect the pacing timing; the sensing event of the atrial refractory period PVARP after falling into the ventricle is called the atrial refractory period sensing event Ars, and the atrial refractory period sensing event Ars triggers a new interference detection window IDP, which is defined by the absolute Refractory period and relative refractory period; if there is no new atrial refractory period sensing event Ars until the end of a certain interfe...
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The invention discloses a method for improving anti-interference performance of a dual-chamber pacemaker atrium interference detection window. The method of the invention arranges different interference detection windows according to a length relation between a PVAB (post ventricular atrial blanking) and a PVARP (post ventricular atrial refractory period); an interference detection window IIDP having a fixed time length is arranged on the rear part of the PVARP; an atrium sensing event happening in the IIDP triggers a new interference detection window IDP; if the PVAB is greater than a difference value between the PVARP and the IIDP, a new PVAB* is set as a difference between the PVARP and the IIDP; if the PVAB is smaller than the difference between the PVARP and the IIDP, an Ars event falling between the PVAB and the IIDP triggers an IIDP* not having a fixed time length; the IDP does not affect a time sequence of the pacemaker; and when the IDP which is constantly reset exceeds a standardized interval, a pacemaker is triggered to perform asynchronous pace-making. The method of the invention improves an anti-interference capability of the dual-chamber heart pacemaker on the premise that hardware and power consumption are not increased.
Description
technical field [0001] The invention relates to the field of medical devices, in particular to a method for improving the anti-interference performance of an atrial interference detection window of a dual-chamber pacemaker, which is suitable for setting an atrial interference detection window for an implantable pulse generator for treating chronic arrhythmia. Background technique [0002] Active implantable medical devices (such as cardiac pacemakers, etc.) for the treatment of chronic arrhythmias consist of implantable pulse generators and electrode leads. Generally, patients equipped with this type of implantable medical device will be followed up by a professional doctor to "program" the device to optimize the operation effect of the device according to the patient's condition. The basic operation is as follows: figure 1 shown. [0003] Program control refers to the transmission of preset parameters such as pacing mode, pacing frequency, output amplitude, sensing sensiti...
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IPC IPC(8): A61N1/37
CPCA61N1/37A61N1/3706
Inventor 刘新蓉张刚曹陈小龙
Owner SHAANXI QINMING MEDICAL CO LTD