公开(公告)号：US20070043394A1

公开(公告)日：2007-02-22

申请号：US11208922

申请日：2005-08-22

申请人： Yunlong Zhang ,  James Gilkerson ,  Yongxing Zhang ,  Boyce Moon

发明人： Yunlong Zhang ,  James Gilkerson ,  Yongxing Zhang ,  Boyce Moon

IPC分类号： A61N1/39

CPC分类号： A61N1/3962 ,  A61N1/3621 ,  A61N1/36521 ,  A61N1/3925

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.

摘要翻译： 测量心内阻抗的系统包括可植入电极和医疗装置。 电极感测受试者心脏的电信号。 医疗装置包括耦合到可植入电极的心脏信号感测电路，耦合到相同或不同可植入电极的阻抗测量电路，以及耦合到心脏信号感测电路和阻抗测量电路的控制器电路。 心脏信号感测电路提供感测的心脏信号。 阻抗测量电路感测电极之间的心内阻抗，以获得心内阻抗信号。 控制器电路使用感测到的心脏信号来确定受试者的心脏周期，并且使用从心脏内阻抗信号获得的多个心内阻抗参数中的心脏周期与心脏周期变化来检测快速性心律失常。

公开(公告)号：US20060241733A1

公开(公告)日：2006-10-26

申请号：US11113715

申请日：2005-04-25

申请人： Yongxing Zhang ,  Yunlong Zhang

发明人： Yongxing Zhang ,  Yunlong Zhang

IPC分类号： A61N1/05

CPC分类号： A61N1/056

摘要： A lead includes a lead body having an expandable section. A plurality of electrodes are disposed on the expandable section. The expandable section is adapted to expand against an inner surface of a heart so as to position at least one of the plurality of electrodes at or near an SA node of the heart.

摘要翻译： 引线包括具有可扩展部分的引线体。 多个电极设置在可扩张部分上。 可膨胀部分适于相对于心脏的内表面扩张，以将多个电极中的至少一个定位在心脏的SA节点处或附近。

公开(公告)号：US20060149325A1

公开(公告)日：2006-07-06

申请号：US10835078

申请日：2004-04-29

申请人： Yunlong Zhang

发明人： Yunlong Zhang

IPC分类号： A61N1/362

CPC分类号： A61N1/371 ,  A61N1/3622

摘要： A method and system for delivering anti-tachycardia pacing (ATP) is disclosed. During delivery of an ATP burst, an implantable cardiac rhythm management device is programmed to sense evoked responses and determine whether or not the ATP burst has entrained the heart by counting the number of successive pacing pulses achieving capture. This information may then be used by the device to adjust the manner in which the ATP therapy is delivered.

公开(公告)号：US20060041300A1

公开(公告)日：2006-02-23

申请号：US10920695

申请日：2004-08-18

申请人： Yongxing Zhang ,  Yunlong Zhang

发明人： Yongxing Zhang ,  Yunlong Zhang

IPC分类号： A61N1/05

CPC分类号： A61N1/057 ,  A61N1/0568 ,  A61N1/0573

摘要： A lead includes a lead body and an electrode disposed proximate a distal end of the lead body. A retaining member is disposed proximate the distal end of the lead and adapted to retain the electrode proximate an interatrial septum when the retaining member is located on a left atrial side of the interatrial septum.