专利名称：DYNAMIC ATRIAL DETECTION SENSITIVITY
CONTROL IN AN IMPLANTABLE MEDICALCARDIAC STIMULATOR
发明人：ROUTH, Andre,BRULS, Annette,WOODSON,
Drury, III,VANDEGRIFF, Joseph,VERBOVEN,Yves
申请号：EP98918209.2申请日：19980413公开号：EP1009480A1公开日：20000621
摘要：An implantable medical device for electrically stimulating the heart to beatincludes a sense circuit for detecting cardiac electrical activity. The sense circuit includesan amplifier with a dynamically adjustable gain to provide increased sensitivity to theelectrogram during atrial fibrillation. Alternatively, sensitivity control is provided bydynamically adjusting threshold limits associated with a threshold detector included inthe sense circuit. The sensitivity level of the medical device to the electrogram can berepeatedly adjusted after implantation and preferably is increased upon detection of theloss of normal sinus rhythm (NSR) in the heart's atria. The medical device is calibratedwith the aid of a calibration device external to the body to determine appropriatesensitivity levels. A method for calibrating and operating an implanted medical devicewith dynamically adjustable sensitivity is also disclosed for improving the medical device'ssensitivity to atrial fibrillation.
申请人：INTERMEDICS INC.
地址：4000 Technology Drive AngletonTexas 77515 US
国籍：US
代理机构：Beresford, Keith Denis Lewis
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