发明名称 |
Intracardiac impedance and its applications |
摘要 |
A system to measure intracardiac impedance includes implantable electrodes and a medical device. The electrodes sense electrical signals of a heart of a subject. The medical device includes a cardiac signal sensing circuit coupled to the implantable electrodes, an impedance measurement circuit coupled to the same or different implantable electrodes, and a controller circuit coupled to the cardiac signal sensing circuit and the impedance measurement circuit. The cardiac signal sensing circuit provides a sensed cardiac signal. The impedance measurement circuit senses intracardiac impedance between the electrodes to obtain an intracardiac impedance signal. The controller circuit determines cardiac cycles of the subject using the sensed cardiac signal, and detects tachyarrhythmia using cardiac-cycle to cardiac-cycle changes in a plurality of intracardiac impedance parameters obtained from the intracardiac impedance signal.
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申请公布号 |
US8494618(B2) |
申请公布日期 |
2013.07.23 |
申请号 |
US20050208922 |
申请日期 |
2005.08.22 |
申请人 |
ZHANG YUNLONG;GILKERSON JAMES O.;ZHANG YONGXING;MOON BOYCE;CARDIAC PACEMAKERS, INC. |
发明人 |
ZHANG YUNLONG;GILKERSON JAMES O.;ZHANG YONGXING;MOON BOYCE |
分类号 |
A61B5/04;A61N1/00 |
主分类号 |
A61B5/04 |
代理机构 |
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代理人 |
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地址 |
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