Continuous electrode monitoring of systolic time intervals during exercise.
Continuous electrode monitoring of systolic time intervals during exercise.
复制标题
运动期间连续电极监测收缩期时间间隔。
作者：
F. Gollan;P. Kizakevich;J. McDermott
目前的心脏收缩时间间隔技术的临床应用有限，因为病人的合作和注意的颈动脉脉搏和心音图传感器是必需的。因此，在采集定时信号时，仅使用表面电极监测心电图和电阻抗心动图一阶导数（dZ/dt）。dZ/dt运动伪影通过计算机集成平均消除，从而允许不间断的数据采集。我们研究了13名正常志愿者的多级跑台运动的连续反应，因为最大失真的非侵入性测量发生在动态运动。将6个符号指数的个体反应趋势合并，每个平均指数具有高度统计学意义（P <0.001）。这种新方法用表面电极连续测量心室性能，因此具有监测危重患者心室性能的潜力。
Current systolic time interval techniques have limited clinical applicability since patient co-operation and attention to the carotid pulse and phonocardiogram transducers are required. Therefore only surface electrodes were used to monitor the electrocardiogram and electrical impedance cardiogram first derivative (dZ/dt) in the acquisition of the timing signals. dZ/dt motion artefacts were eliminated by computerised ensemble averaging, thus permitting uninterrupted data acquisition. We studied the continuous response of multistage treadmill exercise on 13 normal volunteers, since maximal distortion of noninvasive measurements occurs in dynamic exercise. The individual response trends were combined for 6 symbolic indices and each mean index had a high statistical significance (P less than 0.001). This new method surveys continuously ventricular performance with surface electrodes and therefore has the potential of monitoring the ventricular performance of critically ill patients.