System and method for multiple site biphasic stimulation to revert ventricular arrhythmias

A technology of stimulation and ventricle, applied in the direction of cardiac stimulator, electrotherapy, therapy, etc.

Inactive Publication Date: 2001-04-18
MR3 MEDICAL LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these patents disclose the use of multiple electrodes, they do not disclose or suggest that su

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  • System and method for multiple site biphasic stimulation to revert ventricular arrhythmias
  • System and method for multiple site biphasic stimulation to revert ventricular arrhythmias
  • System and method for multiple site biphasic stimulation to revert ventricular arrhythmias

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Embodiment Construction

[0026] Description of the preferred embodiment

[0027] The apparatus and method of the present invention can be understood with reference to FIGS. 1-A , 1-B and 2 to 5 .

[0028] Referring to FIG. 1-A, the illustrated heart is connected with veins 103 and has four chambers: right atrium (RA), left atrium (LA), right ventricle (RV), and left ventricle (LV). The illustrated lead 101 enters the right ventricle through the vein 103 , the right atrium, and the tricuspid valve 111 . Individual electrodes 102, 104, 106, 108, and 110 are connected to electrode lead 101 and are in contact with various internal sites within the right ventricle. No absolute range is set for the number or number of individual electrodes required to practice embodiments of the present invention. Typical ranges include 2 to 30 electrodes, although numbers greater than 30 are possible. Furthermore these electrodes do not have set points. In a preferred embodiment, 6 or fewer electrodes are used, 4 in th...

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Abstract

An anti-reentry apparatus and method for reverting ventricular arrhythmias. Biphasic stimulation is applied at multiple ventricular sites to revert arrhythmias caused by reentry, particularly multiple random reentry. In the preferred embodiment, the first phase of biphasic stimulation is anodal, and is at a maximum subthreshold amplitude. The anodal phase preconditions the myocardium to accept the second phase (cathodal) such that less electrical energy is required to reach the threshold amplitude to produce depolarization. The anodal phase stimulation may have a shape over time that is square wave, ramped, or a series of short square wave pulses. Multiple electrodes located at multiple ventricular sites may be stimulated simultaneously, or they may be sequentially stimulated over time in a manner mimicking the normal progress pattern of cardiac depolarization. The multiple ventricular electrodes may stimulate from internal or external surfaces. One or both ventricles may receive biphasic stimulation from multiple electrodes. The invention also may be practiced with respect to atria.

Description

field of invention [0001] The present invention relates generally to an apparatus and method for preventing relapse, which is effective in assisting the beating of a diseased heart, especially a heart which has conditions which prevent the heart from functioning normally by producing ventricular fibrillation. Rhythmic, electrical conductivity, and / or contractility. In particular, the present invention relates to a relapse prevention device and method that enables simultaneous or progressive biphasic stimulation at multiple sites in one or both ventricles. background of the invention [0002] Heart disease and heart disorders are the leading killers of both men and women in the United States. Various conditions can affect the pattern of the heartbeat, prompting the study of ventricular fibrillation. This severe and ineffective rhythm can be managed with conventional pacemakers, for example, such as such disorders as sinoatrial (SA) nodal block, A-V block, and multiple Cons...

Claims

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Application Information

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IPC IPC(8): A61N1/368A61N1/362
CPCA61N1/3622A61N1/368
Inventor 莫顿·M·莫厄尔
Owner MR3 MEDICAL LLC
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