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2. 发明授权

US5601615A Atrial and ventricular capture detection and threshold-seeking pacemaker 失效
标题翻译：心房和心室捕获检测和门诊起搏器
公开(公告)号：US5601615A
公开(公告)日：1997-02-11
申请号：US291304
申请日：1994-08-16
申请人： H. T. Markowitz , John C. Stroebel , Ren Zhou , John C. Rueter
发明人： H. T. Markowitz , John C. Stroebel , Ren Zhou , John C. Rueter
IPC分类号： A61N1/368 , A61N1/37 , A61N1/372
CPC分类号： A61N1/3712 , A61N1/368 , A61N1/3714
摘要： Capture detection and stimulation threshold-measurement methods and apparatus for deriving atrial and ventricular pace pulse (A-pace and V-pace) stimulation energy strength-duration data. In a first atrial and ventricular threshold test regimen for use with patients having intact A-V conduction or first degree AV block, A-pace pulses are delivered at a test escape interval and A-V delay. Atrial loss of capture (ALOC) in response to an A-pace test stimulus is declared by the absence of a detected ventricular depolarization (V-event) in the latter portion of the paced A-V delay interval following the delivery of the A-pace test stimulus. In the ventricular threshold test regimen, a V-pace test stimulus is delivered after a shortened A-V delay. Ventricular loss of capture (VLOC) is declared by the detection of a V-event in the ventricular refractory period of the V-pace test stimulus. In a second algorithm for use in the atrium or ventricle in patients having regular measured sinus rhythm, premature A-pace or V-pace test stimuli are delivered, and the presence of an A-event or V-event at the end of the measured sinus escape interval is declared to be ALOC or VLOC, respectively. A-pace and V-pace test stimuli are repeated to confirm capture declarations at an energy exceeding the LOC test energy. The atrial and ventricular stimulation threshold data derived by varying both pulse amplitude (strength) and width (duration) is stored in memory for telemetry out and analysis and for use in setting the V-pace and A-pace normal pulse width and amplitude used between successive auto-capture tests in order to conserve battery energy.
摘要翻译：捕获检测和刺激阈值测量方法和装置，用于导出心房和心室起搏脉冲（A步和V步）刺激能量强度持续时间数据。在与具有完整的A-V传导或一级AV阻滞的患者一起使用的第一次心房和心室阈值测试方案中，A步脉冲以测试逃逸间隔和A-V延迟递送。响应于A速度测试刺激的心律失常的捕获（ALOC）是通过在A步测试发送之后的起搏AV延迟间隔的后半部分中没有检测到的心室去极化（V-event）来宣告的刺激。在心室阈值测试方案中，V-pace测试刺激在缩短的A-V延迟之后递送。通过检测V-速度测试刺激的心室不应期中的V-事件来宣告心室收缩损失（VLOC）。在具有正常测量的窦性心律的患者中用于心房或心室的第二种算法中，递送过早的A步或V步测试刺激，并且在测量结束时存在A事件或V-事件窦道逃逸间隔分别被宣告为ALOC或VLOC。重复A步和V步测试刺激，以超过LOC测试能量的能量确认捕获声明。通过改变脉冲幅度（强度）和宽度（持续时间）而得到的房室和心室刺激阈值数据被存储在用于遥测和分析的存储器中，并且用于设定V-步速和A-速度正常脉冲宽度和幅度连续自动捕获测试以节省电池能量。

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