Vector analysis of atrial activity from surface ECGs recorded during atrial fibrillation

J. Ng, Alan Varteres Sahakian*, S. Swiryn

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The traditional perception of atrial fibrillation (AF) as having random and disorganized electrical activity has begun to fade over recent years. Studies involving intra-cardiac mapping have shown evidence of an underlying spatial and temporal organization in the atria during AF. In this study, we used a modified QRS-T cancellation method for multi-lead ECGs and examined vectorcardiograms synthesized from twenty 12-lead ECGs recorded during AF. As a preliminary study we also analyzed ECG recordings taken during an ablation procedure of a typical atrial flutter patient where mechanisms and activation sequences were well known. Of the twenty synthesized vectorcardiograms of AF, five showed a consistent cyclical vector sequence. The other recordings often showed segments of repeated sequences lasting two or three f-wave cycles.

Original languageEnglish (US)
Pages (from-to)21-24
Number of pages4
JournalComputers in Cardiology
StatePublished - Dec 1 2002

ASJC Scopus subject areas

  • Software
  • Cardiology and Cardiovascular Medicine


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