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    • 5. 发明申请
    • LV THRESHOLD MEASUREMENT AND CAPTURE MANAGEMENT
    • LV阈值测量和捕获管理
    • WO2006069032A9
    • 2006-08-31
    • PCT/US2005046054
    • 2005-12-20
    • MEDTRONIC INCSHELDON TODD JSTROEBEL JOHN CPARIKH PURVEE PRADUMANKLECKNER KAREN J
    • SHELDON TODD JSTROEBEL JOHN CPARIKH PURVEE PRADUMANKLECKNER KAREN J
    • A61N1/37
    • A61N1/3627A61N1/3684A61N1/371
    • The invention provides methods and apparatus for determining in a non-tracking pacing mode (e.g., DDI/R, VVI/R) whether a ventricular pacing stimulus is capturing a paced ventricle, including some or all of the following aspects. For example, increasing a ventricular pacing rate a nominal amount to an overdrive pacing rate higher than a most recent heart rate and evaluating a conduction interval from a first pacing ventricle to a second sensing ventricle and then continuing to monitor the underlying rate o ensure that a threshold testing pacing rate will not exceed a predetermined minimum interval and providing pacing stimulation to the first ventricle and sensing the second ventricle to determine whether the pacing stimulation to the first ventricle was one of sub-threshold and supra-threshold. The methods and apparatus are especially useful in conjunction with ensuring actual delivery of a ventricular pacing regime (e.g., cardiac resynchronization therapy or "CRT").
    • 本发明提供了用于在非跟踪起搏模式(例如,DDI / R,VVI / R)中确定心室起搏刺激是否正在俘获起搏心室的方法和设备,包括以下方面中的一些或全部。 例如,将心室起搏频率增加一个名义量至高于最近心率的超速起搏频率,并评估从第一起搏心室至第二心室的传导时间间隔,然后继续监测基础频率o确保 阈值测试起搏速率将不超过预定的最小时间间隔,并向第一心室提供起搏刺激并感测第二心室以确定对第一心室的起搏刺激是否是亚阈值和超阈值之一。 该方法和装置在确保心室起搏方案(例如心脏再同步治疗或“CRT”)的实际输送方面特别有用。
    • 8. 发明申请
    • REGULARIZATION OF VENTRICULAR RATE DURING ATRIAL TACHYARRHYTHMIA
    • 心律失常的心室速率的定量
    • WO0038782A9
    • 2002-04-11
    • PCT/US9930915
    • 1999-12-22
    • MEDTRONIC INC
    • IGEL DAVID AMARKOWITZ H TOBYBETZOLD ROBERT AKLECKNER KAREN JSCHROETTER JERAMY A
    • A61N1/362A61N1/368
    • A61N1/3622
    • A pacing system provided with a mode switching feature and ventricular rate regularization (VRR) function adapted to stabilize or regularize ventricular heart rate during chronic or paroxysmal atrial tachyarrhythmia. In a preferred embodiment, the pacing system nominally operates in an atrial synchronized pacing mode such as DDD or DDDR pacing mode. In response to detection of atrial rhythm characteristics consistent with an atrial tachyarrhythmia, e.g., atrial fibrillation, a mode switch into a non-atrial synchronized, ventricular rate regularization pacing mode, e.g. DDIR or VDIR pacing mode, is made. If the VRR function is programmed on, the ventricular pacing rate based upon a rate responsive sensor derived ventricular pacing rate modulated on a beat by beat basis by preceding intrinsic or paced ventricular events, the stability of the intrinsic ventricular heart rate, and any atrial pace events to regularize the ventricular pacing rate. The pacing system may also be permanently programmed to the DDIR pacing mode with the VRR feature functioning continuously. The pacing system may also be permanently programmed to the VVIR pacing mode with VRR function activated, but without consideration of atrial pace events.
    • 具有模式切换特征和心室率正常化(VRR)功能的起搏系统适于在慢性或阵发性房性快速性心律失常期间稳定或规范心室心率。 在优选实施例中,起搏系统名义地以心房同步起搏模式(例如DDD或DDDR起搏模式)操作。 响应于检测与房性快速性心律失常(例如心房颤动)一致的心房节律特征,模式切换到非心房同步的心室速率正则化起搏模式,例如心房颤动。 DDIR或VDIR起搏模式。 如果VRR功能被编程,则基于速率响应传感器导出的心室起搏速率的心室起搏速率通过先前的内在或节奏心室事件,内部心室心率的稳定性和任何心房起搏 事件来规范心室起搏率。 起搏系统也可以永久编程到DDIR起搏模式,VRR功能连续工作。 起搏系统也可以被永久编程到VVIR起搏模式,VRR功能被激活,但不考虑心房速度事件。
    • 9. 发明申请
    • METHOD AND APPARATUS FOR RATE-RESPONSIVE CARDIAC PACING
    • 方法和装置用于速率反应性心脏病
    • WO9616695A2
    • 1996-06-06
    • PCT/US9514809
    • 1995-11-13
    • MEDTRONIC INC
    • YERICH CHARLES GCOMBS WILLIAM JKLECKNER KAREN JPANKEN ERIC JSCHALLHORN RICHARD SWAHLSTRAND JOHN D
    • A61N1/365
    • A61N1/36585
    • A body-implantable rate-responsive cardiac pacemaker is provided with circuitry for sensing a plurality of physiologic parameters known to be indicative of a patient's metabolic demand for increased cardiac output. In one embodiment, a rate-responsive pacemaker is provided with an activity sensor for detecting the patient's level of physical activity, and is further provided with an impedance sensing circuit for detecting the patient's level of minute ventilation by monitoring cardiac impedance. A rate-response transfer function, implemented by the pacemaker's control circuitry, periodically computes a rate-responsive pacing rate as a function of the outputs from both physiologic sensing circuits. The pacemaker's pacing rate is variable within a rate range defined by predetermined (programmable) upper and lower limits. In the preferred embodiment, the influence of activity sensing and minute ventilation parameters varies in accordance with the current pacing rate. In particular, the influence of activity sensing in rate determination in accordance with the rate-response function is greater than that of minute ventilation, for slower pacing rates, while the influence of minute ventilation sensing dominates over that of activity sensing for higher pacing rates. Rate response operation of the disclosed system is recorded in the form of histogram data stored over a predetermined history time. The relative influence of the activity sensing and minute ventilation sensing on rate determination is periodically scaled or balanced based upon comparison of the histogram data with predetermined desired response data.
    • 身体植入式速率响应心脏起搏器被提供有用于感测已知指示患者对增加的心输出量的代谢需求的多个生理参数的电路。 在一个实施例中,速率响应起搏器设置有用于检测患者的身体活动水平的活动传感器,并且还设置有阻抗感测电路,用于通过监测心脏阻抗来检测患者的分钟通气水平。 由起搏器的控制电路实现的速率响应传递函数周期性地计算速率响应起搏速率作为来自生理感测电路的输出的函数。 起搏器的起搏速率在由预定(可编程)上限和下限限定的速率范围内是可变的。 在优选实施例中,活动感测和分钟通气参数的影响根据当前起搏速率而变化。 特别是,根据速率响应函数的速率测定中的活动检测的影响大于分钟通气量,对于较慢的起搏速率,而微动通气检测的影响比活动检测的影响高于起搏率。 以预定历史时间存储的直方图数据的形式记录所公开的系统的速率响应操作。 基于直方图数据与预定的期望响应数据的比较,活动感测和分钟通气感测对速率确定的相对影响被周期地缩放或平衡。