Department of Gerontology, The First Affiliated Hospital of Jinzhou Medical University, Renmin Street, Jinzhou, 121000, Liaoning Province, China.
Department of Cardiology, The First Affiliated Hospital of Jinzhou Medical University, Renmin Street, Jinzhou, 121000, Liaoning Province, China.
BMC Cardiovasc Disord. 2024 Apr 20;24(1):217. doi: 10.1186/s12872-024-03875-2.
During normal sinus rhythm, atrial depolarization is conducted from right atrium to left atrium through Bachmann's bundle, and a normal P wave axis which is measured on the frontal plane is between 0º and + 75º. The change of P wave polarity is helpful for the analysis of origin point.
We report a patient with negative P wave in lead I. The characteristics of QRS complex in leads V to V are helpful to preliminarily differential diagnosis. The 12-lead electrocardiogram (ECG) with correct limb leads (right arm-left arm) placement shows sinus rhythm with complete right bundle branch block (RBBB).
The change of P wave polarity as well as characteristics of QRS complex can help identify limb-lead reversals.
在窦性心律时，心房激动通过 Bachmann 束从右心房传导至左心房，正常 P 波电轴在额面测量位于 0°至+75°之间。P 波极性的改变有助于分析起源点。
我们报告了一例 I 导联 P 波负向的患者。V 至 V 导联 QRS 波群的特征有助于初步鉴别诊断。正确放置肢体导联（右臂-左臂）的 12 导联心电图（ECG）显示窦性心律合并完全性右束支阻滞（RBBB）。
P 波极性的改变以及 QRS 波群的特征有助于识别肢体导联的反转。
