1. An interesting electrocardiogram caused by lead reversal.
- Author
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Li C, Wang N, Chang Q, and Pan D
- Subjects
- Humans, Sinoatrial Node, Heart Atria, Atrioventricular Node, Electrocardiography, Bundle-Branch Block diagnosis
- Abstract
Background: 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 +โ75º. The change of P wave polarity is helpful for the analysis of origin point., Case Presentation: We report a patient with negative P wave in lead I. The characteristics of QRS complex in leads V
1 to V6 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)., Conclusions: The change of P wave polarity as well as characteristics of QRS complex can help identify limb-lead reversals., (© 2024. The Author(s).)- Published
- 2024
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