Alternans of the T wave in ECG (TWA) has high negative but poor positive predictive value in prediction of ventricular arrhythmia. Alternans of repolarization duration, i.e. of action potential duration (APD), causes TWA. Prior studies from our group showed that alternans of the maximum rate ...
In a homogeneous medium within which the speed of wave propagation is v (or in free space, where electromagnetic waves propagate at the velocity of light, with v=c), the wave amplitude satisfies the wave equation (15.4)∇2ψ(r,t)=1v2∂2ψ∂t2. This equation is also linear, homog...
The Observation and Study for A Wave Amplitude of Atrioventricular Synchronous Pacing System. 房室顺序起搏系统A波振幅测量值的观察研究。 www.ilib.cn 2. Conclusion ECG P wave amplitude changes are a useful standard in evaluating hyperthyroidism therapy. 结论心电图P波振幅的变化可以作为评价疗效的指标。
Fill in the blank. An increased duration or amplitude of the P wave indicates ___. Left Atrium: The human heart has four chambers: the two upper chambers are known as the atrium, and the two lower chambers are known as the ventricles. The left atrium receives oxygenate...
wave amplitude 美 英 un.波幅;波振辐;波度 网络波振幅 英汉 网络释义 un. 1. 波幅 2. 波振辐 3. 波度
Ambulatory measurement of the ECG T-wave amplitude recording of the preejection period (PEP) can be used to measure changes in cardiac sympathetic nervous system (SNS) activity under naturalistic conditions... RV Lien,M Neijts,G Willemsen,... - 《Psychophysiology》 被引量: 35发表: 2014年 Rel...
Fig. 15. ECG structures in left ventricular hypertrophy pattern. (A) Note absence of ST-segment and T-wave changes. (B) Predominantly positive QRS complexes with ST-segment depression and T-wave inversion. (C) Predominantly negative QRS complexes with ST-segment elevation and upright T wave. ...
long-QT syndromeBACKGROUND: T-wave alternans (TWA), an ECG phenomenon characterized by beat-to-beat alternation of the morphology, amplitude, and/or ... W Shimizu,C Antzelevitch - 《Circulation》 被引量: 620发表: 1999年 Beat-to-Beat Repolarization Variability in LQTS Patients with the SCN5...
T. Figarella, M.H. Jansen Chapter Digital Systems Amplitude Modulation (AM) Figure 9.18a shows a carrier signal which is a sinusoid with constant amplitude and frequency. It is typically a radio frequency (RF) wave and must be much higher in frequency (at least by a factor of 10) than...
1) ECG amplitude ECG波幅2) ECG filter ECG滤波3) ECG compress wave ECG按压波形 1. Investigated the value of ECG compress waves monitoring at external cardiac compression. 目的研究ECG按压波形与胸外按压的相关性,及其对胸外按压效果的临床指导意义。