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Assessing intra-cardiac activation patterns

A technique of heart, model, applied in the field of electrophysiology

Active Publication Date: 2014-02-05
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, some patients who may benefit from CRT may not be prescribed CRT based on current techniques for assessing electrical dyssynchrony

Method used

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  • Assessing intra-cardiac activation patterns
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  • Assessing intra-cardiac activation patterns

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 is a conceptual diagram illustrating an example system that may be used to provide a CRT to the heart 10 of a patient 1 . The system may include an implantable medical device (IMD) 100 . IMD100 can be a CRT pacemaker or a CRT defibrillator. IMD 100 may be equipped with one or more leads; leads 102 , 104 , and 106 , which are inserted into or on the surface of left ventricle 12 , right ventricle 14 , or right atrium 16 of heart 10 . Leads 102 , 104 and 106 may be equipped with one or more electrodes 108 , 110 and 112 .

[0026] Heart 10 may experience electrical asynchrony. Electrical dyssynchrony can occur when the depolarizing signals that initiate the contraction of the ventricles 12 and 14 do not reach the ventricles in a coordinated manner, and result in an inefficient pumping action of the heart 10 . Patient 1 may experience symptoms of heart failure. Electrical dyssynchrony may be caused by damage to the electrical system of heart 10, such as bundle ...

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PUM

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Abstract

Techniques for evaluating cardiac electrical dyssynchrony are described. In some examples, an activation time is determined for each of a plurality of torso-surface potential signals. The dispersion or sequence of these activation times may be analyzed or presented to provide variety of indications of the electrical dyssynchrony of the heart of the patient. In some examples, the locations of the electrodes of the set of electrodes, and thus the locations at which the torso-surface potential signals were sensed, may be projected on the surface of a model torso that includes a model heart. The inverse problem of electrocardiography may be solved to determine electrical activation times for regions of the model heart based on the torso-surface potential signals sensed from the patient.

Description

technical field [0001] The present invention relates to electrophysiology, and more particularly to assessing the electrical activation pattern of the heart. Background technique [0002] The beating of the heart is controlled by the sinoatrial node, a group of conducting cells located in the right atrium near the entrance to the superior vena cava. The atrioventricular node is activated by a depolarizing signal generated by the sinoatrial node. The AV node briefly delays the propagation of the depolarizing signal, allowing the atria to drain before the depolarizing signal is delivered to the ventricles of the heart. Coordinated contraction of the two ventricles drives blood flow through the patient's torso. Under certain circumstances, the conduction of depolarizing signals from the AV node to the left and right ventricles can be interrupted or slowed down. This can cause the left and right ventricles to contract out of sync, eventually leading to heart failure or death....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0402A61B5/0408A61N1/362A61N1/368
CPCA61N1/0484A61B5/0402A61N1/0476A61B5/04085A61N1/3627A61N1/3682A61N1/3684A61N1/36843A61N1/36842A61B5/282A61B5/318A61B5/05A61B5/02A61B5/316A61B5/339A61B5/349A61B5/742
Inventor S·戈什J·M·吉尔伯格R·W·斯塔德勒
Owner MEDTRONIC INC
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