Why the study?
Can atrial fibrillation be detected by analyzing high voltage lead signals from implantable ventricular defibrillators?
Can atrial fibrillation be detected by analyzing high voltage lead signals from implantable ventricular defibrillators?
High voltage lead signals from ICDs contain atrial activity that can be processed to detect atrial fibrillation in many cases, potentially expanding device diagnostic capabilities.
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HV signals may enable AF detection in existing ICDs; hypothesis-generating and requires prospective validation before any clinical use.
In this study, the authors examined the atrial activity content of high voltage (HV) lead signals of implantable cardioverter defibrillators (ICDs) during device implantation. They also attempted to detect atrial fibrillation (AFib) by analyzing these signals. They used a method that canceled ventricular and correlated atrial activity from the HV lead signals and measured frequency and amplitude distribution information to discriminate sinus rhythm and AFib segments. The results suggest that atrial activity is present in HV lead signals, and AFib detection can be achieved in many, but not all cases, using information currently available to ICDs.
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Shkurovich et al. (2002) studied this question.
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