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SYSTEMS AND METHODS FOR SELECTIVELY UPDATING CARDIAC MORPHOLOGY DISCRIMINATION TEMPLATES FOR USE WITH IMPLANTABLE MEDICAL DEVICES
SYSTEMS AND METHODS FOR SELECTIVELY UPDATING CARDIAC MORPHOLOGY DISCRIMINATION TEMPLATES FOR USE WITH IMPLANTABLE MEDICAL DEVICES
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机译:选择性更新可植入医疗设备使用的心脏形态识别模板的系统和方法
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摘要
Techniques are provided for updating a morphology template used to discriminate abnormal cardiac rhythms. In one example, a non-weighted candidate morphology template is generated based on far-field R-wave morphology. A weighted candidate morphology template is generated based on an ensemble average of the non-weighted candidate morphology template and a previous (i.e. active) morphology template. The previous morphology template is then selectively updated based on a comparison of additional R-waves against both the non-weighted and the weighted candidate templates. Thereafter, abnormal cardiac rhythms such as ventricular tachycardia and supraventricular tachycardia are discriminated using the updated morphology template based on newly-detected far-field R-waves. These techniques provide a method for updating the morphology discrimination template in response to long-term changes in morphology due to cardiac remodeling or cardiac disease progression.
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