Atrial repolarization as observable during the PQ interval.
- Ihara Z Signal Processing Institute, Swiss Federal Institute of Technology Lausanne (EPFL), Switzerland. zenichi.ihara@epfl.ch
- van Oosterom A
- Hoekema R
- 2006-05-03
Published in:
- Journal of electrocardiology. - 2006
Atrial Function
Body Surface Potential Mapping
Diagnosis, Computer-Assisted
Female
Heart Conduction System
Humans
Male
Reference Values
Reproducibility of Results
Sensitivity and Specificity
English
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.
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.
- Language
-
- English
- Open access status
- green
- Identifiers
-
- DOI 10.1016/j.jelectrocard.2005.12.001
- PMID 16650429
- Persistent URL
- https://sonar.rero.ch/global/documents/209610
Statistics
Document views: 18
File downloads:
- fulltext.pdf: 0