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Editorial
Highlights methodological limitations in measuring P-wave duration and dispersion manually from standard paper-printed ECGs.
With great interest, we have read the article of Fan and colleagues 1 on the effects of biatrial pacing in the prevention of postoperative atrial fibrillation after coronary artery bypass surgery. By measuring P-wave duration from 12-lead surface ECGs and calculating P-wave dispersion, they found that biatrial pacing resulted in a more significant reduction in P-wave dispersion when compared with single-site atrial pacing. Although these results are interesting, we believe that they should be considered cautiously because of the limited accuracy of electrocardiographic measurements performed manually on paper-printed ECGs obtained at a standard signal size and paper speed.
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Dilaveris et al. (2001) studied this question.
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