SAGE Journals Online
Advertisement
Sign In to gain access to subscriptions and/or personal tools.

 

Advanced Search

Journal Navigation

Journal Home

Subscriptions

Archive

Contact Us

Table of Contents

Advertisement

Sign In to gain access to subscriptions and/or personal tools.
Angiology
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to Saved Citations
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Morikawa, J.
Right arrow Articles by Kashima, K.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Morikawa, J.
Right arrow Articles by Kashima, K.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?

Delineation of Premature P Waves on Four-Dimensional Electrocardiography, a New Display of Electrical Forces by Computer Techniques

Junichiro Morikawa, M.D.

Third Department of Internal Medicine, and Department of Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Yoshizumi Habuchi, M.D.

Third Department of Internal Medicine, and Department of Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Manabu Nishio, M.D.

Third Department of Internal Medicine, and Department of Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Taku Yamamoto, M.D.

Third Department of Internal Medicine, and Department of Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Hideo Tanaka, M.D.

Third Department of Internal Medicine, and Department of Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Kei Kashima, M.D.

Third Department of Internal Medicine, and Department of Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.

This study investigated the feasibility of four-dimensional electrocardiography (4-D ECG), a new display in which the vector loop was rotated and scanned along a timed axis to overcome the shortcomings of vectorcardiography (VCG). The subjects consisted of 38 patients with premature atrial complexes and 30 controls. The orthogonal Frank elec trocardiograms were rotated three-dimensionally according to the right-hand rectangular coordinate system and scanned along a timed axis. The P wave delineation score, signi fying good agreement with the intraobserver and interobserver variability, was signifi cantly higher in 4-D ECG than those in the orthogonal leads or those on the transverse and frontal projections (P < 0.001). The authors measured the premature P loop areas as viewed from 361 directions. P loop areas were best delineated when viewed from cranial directions of 42.6 ±34.0 degrees and from rightward directions of 11.3 ±30.7 degrees. Adequate cranial rotation followed by scanning along a timed axis will maximally delineate premature atrial signals and provide comprehensive visualization of electrical forces.

Angiology, Vol. 47, No. 11, 1101-1106 (1996)
DOI: 10.1177/000331979604701111
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?




Advertisement