METHOD AND APPARATUS FOR REDUCING DEFIBRILLATION THRESHOLD
First Claim
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1. A system configured to be coupled to a heart including a right atrium (RA) connected to a superior vena cava (SVC), a right ventricle (RV), a left ventricle (LV), a coronary sinus, and a coronary vein, the system comprising:
- a sensor configured to detect a cardiac activity indicated for a defibrillation shock;
a vagal nerve stimulator configured to deliver vagal nerve stimulation to lower a defibrillation threshold in preparation for delivering the defibrillation shock;
a plurality of defibrillation electrodes including at least one LV electrode configured to be placed in the coronary sinus or coronary vein; and
a defibrillator configured to deliver the defibrillation shock to the heart through the plurality of defibrillation electrodes.
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Abstract
An antitachyarrhythmia system uses vagal nerve stimulation in combination with one or more additional techniques to lower the defibrillation threshold (DFT). Examples of such additional techniques include using electrical shock waveforms each including a plurality of pulses and using defibrillation electrode configurations each including an electrode placed in the coronary sinus or coronary vein.
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Citations
28 Claims
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1. A system configured to be coupled to a heart including a right atrium (RA) connected to a superior vena cava (SVC), a right ventricle (RV), a left ventricle (LV), a coronary sinus, and a coronary vein, the system comprising:
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a sensor configured to detect a cardiac activity indicated for a defibrillation shock; a vagal nerve stimulator configured to deliver vagal nerve stimulation to lower a defibrillation threshold in preparation for delivering the defibrillation shock; a plurality of defibrillation electrodes including at least one LV electrode configured to be placed in the coronary sinus or coronary vein; and a defibrillator configured to deliver the defibrillation shock to the heart through the plurality of defibrillation electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for defibrillating a heart including a right atrium (RA) connected to a superior vena cava (SVC), a right ventricle (RV), a left ventricle (LV), a coronary sinus, and a coronary vein, comprising:
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detecting a cardiac activity indicated for a defibrillation shock; applying neural stimulation to lower a defibrillation threshold in preparation for the defibrillation shock; and delivering the defibrillation shock using a plurality of defibrillation electrodes including at least one LV electrode placed in the coronary sinus or coronary vein. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A system coupled to a heart including a right atrium (RA) connected to a superior vena cava (SVC), a right ventricle (RV), a left ventricle (LV), a coronary sinus, and a coronary vein, the system comprising:
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means for detecting a cardiac activity indicated for a defibrillation shock; means for applying neural stimulation to lower a defibrillation threshold in preparation for the defibrillation shock; and means for subcutaneously delivering the defibrillation shock using a plurality of defibrillation electrodes including at least one LV electrode placed in the coronary sinus or coronary vein.
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Specification