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System and method for estimating defibrillation impedance based on low-voltage resistance measurements using an implantable medical device
System and method for estimating defibrillation impedance based on low-voltage resistance measurements using an implantable medical device
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机译:使用可植入医疗设备基于低压电阻测量值估算除颤阻抗的系统和方法
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摘要
Techniques are provided for estimating defibrillation impedance of an implantable cardioverter/defibrillator (ICD). Briefly, at least two low-voltage resistance values are measured at different voltages using a pair of stimulation electrodes connected to the ICD. High-voltage defibrillation impedance is then estimated by the ICD based on a weighted combination of the measured resistance values. In one example, a set of weight coefficients, calculated during an initial calibration procedure, are applied to the measured resistance values to produce the estimate of the high-voltage defibrillation impedance. The weight coefficients are updated whenever a defibrillation shock is delivered, based on actual defibrillation impedance values measured during the shock.
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