Chang Qinghua, Liu Renguang, Chen Juan
Cardiovascular Institute of the First Affiliated Hospital of Jinzhou Medical University; Liaoning Province-China.
Anatol J Cardiol. 2017 Aug;18(2):110-114. doi: 10.14744/AnatolJCardiol.2017.7749. Epub 2017 Jun 22.
The P-QRS-T wave on surface electrocardiogram (ECG) reflects the changes in atrial and ventricular electrical properties. However, the atrioventricular conduction system potentials cannot be recorded to date. This study aimed to explore the possibility of micropotential of the atrioventricular conduction system recorded by surface "SAN-Atrial-AVN-His (Saah) ECG."
We randomized 100 healthy volunteers (50 females and 50 males; mean age 25.12±1.62 years) to receive "conventional 12-lead ECG" and "Saah ECG," which were recorded by the "Saah ECG" machine. We recorded and further analyzed "conventional 12-lead ECG" and "Saah ECG." According to the microwavelets before the QRS complex, the PR interval was the sum of three intervals: PAs interval (PA interval recorded on surface ECG), AHs interval (AH interval recorded on surface ECG), and HVs interval (HV interval recorded on surface ECG). The PR interval, PAs interval, AHs interval, and HVs interval were measured.
Not only the P-QRS-T waves but also the microwavelets before the P wave, before the QRS complex, and after the QRS complex were recorded in 100 healthy volunteers. The PAs interval, AHs interval, and HVs interval were 22-37 (31.23±2.93) ms, 60-103 (76.07±13.43) ms, and 39-55 (49.29±4.44) ms, respectively. The PAs interval, AHs interval, and HVs interval were consistent with the intracardiac measurements (PA, AH, and HV intervals) obtained in previous studies. Compared with female volunteers, male volunteers had a longer AHs interval (p<0.05).
Not only the P-QRS-T waves but also the microwavelets before the P wave, before the QRS complex, and after the QRS complex were recorded on surface ECG. The wavelets before the QRS complex may be related to atrioventricular nodal, His bundle (bundle branch) potentials.
体表心电图（ECG）上的P-QRS-T波反映心房和心室电活动的变化。然而，迄今为止无法记录房室传导系统电位。本研究旨在探讨通过体表“窦房结-心房-房室结-希氏束（Saah）心电图”记录房室传导系统微电位的可能性。
我们将100名健康志愿者（50名女性和50名男性；平均年龄25.12±1.62岁）随机分组，分别接受由“Saah心电图”机器记录的“常规12导联心电图”和“Saah心电图”。我们记录并进一步分析“常规12导联心电图”和“Saah心电图”。根据QRS波群之前的微小波，PR间期是三个间期之和：PAs间期（体表心电图记录的PA间期）、AHs间期（体表心电图记录的AH间期）和HVs间期（体表心电图记录的HV间期）。测量PR间期、PAs间期、AHs间期和HVs间期。
在100名健康志愿者中不仅记录到了P-QRS-T波，还记录到了P波之前、QRS波群之前和QRS波群之后的微小波。PAs间期、AHs间期和HVs间期分别为22 - 37（31.23±2.93）毫秒、60 - 103（76.07±13.43）毫秒和39 - 55（49.29±4.44）毫秒。PAs间期、AHs间期和HVs间期与先前研究中获得的心内测量值（PA、AH和HV间期）一致。与女性志愿者相比，男性志愿者的AHs间期更长（p<0.05）。
体表心电图不仅记录到了P-QRS-T波，还记录到了P波之前、QRS波群之前和QRS波群之后的微小波。QRS波群之前的小波可能与房室结、希氏束（束支）电位有关。
