A heart resynchronization therapy system based on auto-atrioventricular conduction

A technology of cardiac resynchronization and atrioventricular conduction, applied in physical therapy, artificial respiration, etc., can solve the problems of weakening atrial "assist pump function, shortening ventricular diastolic time, and reducing cardiac output, etc., and achieves low cost of use. Broad, low-power effects

Active Publication Date: 2018-08-17
吴强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain 100% biventricular pacing, it is often necessary to set a shorter A-V interval, but too short A-V interval can shorten the time of ventricular diastole, leading to premature ventricular contraction and premature closure of the mitral / tricuspid valve, which not only reduces the output, and also impairs the function of the atrial "assistant pump"

Method used

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  • A heart resynchronization therapy system based on auto-atrioventricular conduction
  • A heart resynchronization therapy system based on auto-atrioventricular conduction
  • A heart resynchronization therapy system based on auto-atrioventricular conduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] 1. Example 1: Non-paced RA approach

[0072] (1) Implementation conditions

[0073] The patient was in sinus rhythm without obvious arrhythmia, the average ventricular rate was >50-60bpm, and the electrocardiogram showed that the P wave and the QRS wave had a fixed relationship of 1:1.

[0074] (2) The pacing electrode catheter is implanted and connected to CRT-GZ1

[0075] Using conventional techniques under local anesthesia, RA electrodes and LV electrodes were implanted via the subclavian vein (the LV electrodes were placed in the lateral or posterior vein of the coronary vein). The electrodes and LV electrodes are reliably connected to the atrial and ventricular input / exit of CRT-GZ1, and the electrodes and CRT-GZ1 are fixed and embedded in the upper chest subcutaneously.

[0076] (3) Parameter setting

[0077] The pacing mode of CRT-GZ1 is atrial synchronous ventricular pacing (VAT); the basic pacing frequency (TS1S1 interval) set for the patient is lower than t...

Embodiment 2

[0085] 2. Embodiment 2: pacing RA mode

[0086] (1) Implementation conditions

[0087] The patient has obvious sinus bradycardia, sinoatrial block or sinus arrest, and the average ventricular rate is <50bpm.

[0088] (2) Connection of pacing lead and CRT-GZ1

[0089] Using conventional techniques under local anesthesia, RA electrodes and LV electrodes were implanted via the subclavian vein (the LV electrodes were placed in the lateral or posterior vein of the coronary vein). The electrodes and LV electrodes are reliably connected and fixed to the atrial and ventricular input / exit of the CRT-GZ1, and the electrodes and the CRT-GZ1 are fixed and embedded under the skin of the upper chest.

[0090] (3) Parameter setting

[0091] CRT-GZ1 pacing mode is DDD / DDDR; set the patient's basic pacing frequency (TS1S1 interval) higher than the average heart rate of 5, 10, 15, 20bpm, specific parameters can be selected; set positive and / or negative Scan step (5, 10, 15, 20ms), minimum o...

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Abstract

The invention relates to a cardiac resynchronization therapy (CRT) method based on self atrioventricular conduction. The method comprises the following steps of implanting a right atrium endocardium electrode and a left ventricle epicardium pace-making electrode in a patient of CRT adaptation diseases; connecting electrodes with a pulse generator; setting parameters of the intelligent pulse generator; executing a scanning search program for collecting real-time electrocardiosignals and left ventricle pace-making commands; performing time fixed point measurement and logic algorithm analysis of scanning search resources by the pulse generator, so as to find an AS / AP-VP interval when the most narrow QRS interval occurs; executing timed CRT by the pulse generator during the AS / AP-VP interval; after the abovementioned process is finished, performing electrocardiosignal collection and pace-making scanning search by the pulse generator, re-finding an AS / AP-VP interval when the most narrow QRS interval occurs; executing timed CRT during the AS / AP-VP interval; and repeating the cycle in such a way. The method is characterized by high intelligent degree, wide application, simple operation and low usage cost.

Description

technical field [0001] The invention relates to the field of cardiac pacing for treating heart failure (CHF) in the medical and health field, in particular to a heart resynchronization therapy (CRT) method based on self-atrioventricular conduction. Background technique [0002] CHF is one of the malignant fates of all cardiovascular diseases. Although the in-hospital mortality and rehospitalization rate of CHF patients have been reduced with the continuous improvement of etiological treatment and drug treatment such as angiotensin-converting enzyme inhibitors and β-blockers, the incidence of CHF is still at the top of the list. If it remains high, it will seriously affect the quality of life and prognosis of patients with cardiovascular disease. In 1994, French doctor Cazeau et al. first reported that four-chamber (double atrium, double ventricle) pacing therapy was performed on a male CHF patient with complete left bundle branch block (LBBB), which significantly improved h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N1/36
Inventor 吴强俞杉范寿年蒋晨曦
Owner 吴强
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