Abboud S, Belhassen B, Pelleg A, Laniado S, Sadeh D
Pacing Clin Electrophysiol. 1984 Jan;7(1):40-5. doi: 10.1111/j.1540-8159.1984.tb04858.x.
Ten patients with Wolff-Parkinson-White syndrome underwent external His bundle recording using an advanced signal-averaging technique. Surface ECG waveforms were recorded and digitized at 1.28 kHz (10 bit resolution) and then averaged with a CDC-6600 computer. A cross-correlation function, operating in the frequency domain (using the Fast Fourier Transform algorithm) was employed to extract fiducial synchronizing marks for the waveform alignment. Using this technique, reliable His bundle activity could be recorded in nine of ten patients. There was a good correlation between the HQ and HV intervals obtained during external and internal His bundle recordings, respectively, in seven patients who underwent both recordings. Administration of ajmaline enabled to obtain the His bundle activity using a digital filter with low frequency cut-off of 30 Hz as compared to the cut-off of 150 Hz which was necessary during control to reduce the electrical activity of the delta wave. We conclude that using a computerized cross-correlation signal-averaging technique enables the external His bundle recording in patients with WPW syndrome.
十例预激综合征患者采用先进的信号平均技术进行了体表希氏束记录。体表心电图波形以1.28千赫兹（10位分辨率）进行记录和数字化处理，然后用一台CDC - 6600计算机进行平均处理。采用在频域中运行的互相关函数（使用快速傅里叶变换算法）来提取用于波形对齐的基准同步标记。使用该技术，十例患者中有九例能够记录到可靠的希氏束活动。在接受了体表和心内希氏束记录的七例患者中，体表记录和心内记录分别获得的H-Q间期和H-V间期之间存在良好的相关性。与对照期间为减少δ波电活动所需的150赫兹截止频率相比，静脉注射阿义马林能够使用低频截止频率为30赫兹的数字滤波器获得希氏束活动。我们得出结论，使用计算机化互相关信号平均技术能够对预激综合征患者进行体表希氏束记录。
