Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2006 Jul;39(3):290-7.
doi: 10.1016/j.jelectrocard.2005.12.001. Epub 2006 Mar 9.

Atrial repolarization as observable during the PQ interval

Zenichi Ihara  1 , Adriaan van Oosterom, Rudi Hoekema
Affiliations

Atrial repolarization as observable during the PQ interval

Zenichi Ihara et al. J Electrocardiol. 2006 Jul.

Abstract

Objective: We aimed to study the involvement of atrial repolarization in body surface potentials.

Methods: Electrocardiograms of healthy subjects were recorded using a 64-lead system. The data analysis focused on the PQ intervals while devoting special attention to the low-amplitude signals during the PQ segment: the segment from the end of the P wave until onset QRS. The data were analyzed by inspecting body surface potential maps and the XYZ signals of the vectorcardiogram.

Results: Standard P-wave features exhibited normal values. The local potential extremes were found at positions not sampled by the standard leads. The PQ segment was found to be not isoelectric, the time course of the potential distribution being very similar to that during the P wave but for a reversed polarity and about 3-fold lower magnitudes.

Conclusion: The results demonstrate a significant involvement of atrial repolarization during the PQ interval and essentially discordant "atrial T waves," suggesting a small dispersion of atrial action potential durations.

PubMed Disclaimer

LinkOut - more resources