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SYSTEMS AND METHODS FOR USE WITH AN IMPLANTABLE MEDICAL DEVICE FOR DISCRIMINATING VT AND SVT BE SELECTIVELY ADJUSTING ATRIAL CHANNEL SENSING PARAMETERS
SYSTEMS AND METHODS FOR USE WITH AN IMPLANTABLE MEDICAL DEVICE FOR DISCRIMINATING VT AND SVT BE SELECTIVELY ADJUSTING ATRIAL CHANNEL SENSING PARAMETERS
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机译:与用于区分VT和SVT的可植入医疗设备一起使用的系统和方法将选择性地调整心房通道感测参数
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摘要
Techniques are described for discriminating ventricular tachycardia (VT) from supraventricular tachycardia (SVT) in circumstances when the ventricular rate exceeds the atrial rate (i.e. VA). In one example, an initial atrial rate is detected while employing adjustable atrial channel detection parameters that can affect the detection of the true atrial rate—such as a post-ventricular atrial blanking (PVAB) interval or an atrial channel sensitivity level. If the ventricular rate exceeds a VT rate zone threshold with VA, the device does not immediately deliver high voltage shock therapy as done in other devices. Rather, the device instead selectively adjusts the atrial channel detection parameter(s) to determine if the true atrial rate is equal to the ventricular rate. If so, then such is an indication that the arrhythmia might be SVT rather than VT and various discrimination procedures are employed to distinguish SVT from VT before therapy is delivered.
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