发明名称 System and method for measuring cardiac activity
摘要 An implantable cardiac stimulation device, such as a pacemaker or an implantable cardioverter-defibrillator, that includes an accelerometer-based activity sensor that processes one or more signals from the activity sensor to obtain parameters that are indicative of the heartbeat of the patient. The implantable cardiac stimulation device determines when the patient is at rest and the activity sensor provides a signal that corresponds to the acceleration of the sensor due to the heartbeat of the patient. This acceleration signal is integrated over time once to provide a contractility parameter, which is indicative of the contractility of the heart and is integrated over time twice to provide a displacement parameter, which is indicative of the displacement of the heart wall during the heartbeat. This displacement parameter is thereby indicative of the volume of blood pumped by the heart. A microprocessor uses either the contractility parameter, the displacement parameter or both to modify the delivery of therapeutic stimulation pulses to the heart.
申请公布号 US5991661(A) 申请公布日期 1999.11.23
申请号 US19970954326 申请日期 1997.10.17
申请人 PACESETTER, INC. 发明人 PARK, EULJOON;BORNZIN, GENE A.;FLORIO, JOSEPH J.;BRADLEY, KERRY
分类号 A61N1/365;(IPC1-7):A61N1/365 主分类号 A61N1/365
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