Method providing atrial anti-tachyarrhythmia therapy
First Claim
1. A method of applying anti-tachyarrhythmia therapy to a heart, the method including the steps of:
- detecting, from an atrium of the heart, atrial tachyarrhythmia activity indicative of a need for the anti-tachyarrhythmia therapy;
monitoring ventricular activity of the heart for an indication of abnormal susceptibility to a ventricular tachyarrhythmia; and
applying the anti-tachyarrhythmia therapy to the atrium in response to the detected atrial tachyarrhythmia activity, but delaying the application of the anti-tachyarrhythmia therapy for a first time delay if the indication of abnormal susceptibility to the ventricular tachyarrhythmia is detected.
1 Assignment
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Accused Products
Abstract
The device provides anti-tachyarrhythmia therapy, such as a countershock, to an atrium needing treatment, but delays its delivery for a programmable period of time following an indication of susceptibility to ventricular tachyarrhythmia (VT). This reduces the risk of reinducing VT during a period in which the heart is abnormally metabolically vulnerable to VT, including ventricular fibrillation (VF). The delay time may be independently programmed for different indications of VT, and may be synchronized to and delayed from the R-wave. The delay time may be adjusted, such as to exceed one second, or even to exceed several hours, in order to accommodate the metabolic abnormal susceptibility of the particular patient in the wide range of patients needing treatment of atrial tachyarrhythmias.
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Citations
25 Claims
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1. A method of applying anti-tachyarrhythmia therapy to a heart, the method including the steps of:
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detecting, from an atrium of the heart, atrial tachyarrhythmia activity indicative of a need for the anti-tachyarrhythmia therapy; monitoring ventricular activity of the heart for an indication of abnormal susceptibility to a ventricular tachyarrhythmia; and applying the anti-tachyarrhythmia therapy to the atrium in response to the detected atrial tachyarrhythmia activity, but delaying the application of the anti-tachyarrhythmia therapy for a first time delay if the indication of abnormal susceptibility to the ventricular tachyarrhythmia is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of applying anti-tachyarrhythmia therapy to a heart, the method including the steps of:
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detecting, from an atrium of the heart, atrial tachyarrhythmia activity indicative of a need for the anti-tachyarrhythmia therapy; determining whether a ventricle of the heart is abnormally susceptible to fibrillation; and applying anti-tachyarrhythmia therapy to the atrium in response to the detected atrial tachyarrhythmia activity, but delaying the application of the anti-tachyarrhythmia therapy for at least a time period in which the ventricle of the heart is abnormally susceptible to fibrillation.
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Specification