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Interatrial block: the pandemic remains poorly perceived

David H Spodick1, Vignendra Ariyarajah

  • 1University of Massachusetts Medical School, Worcester, Department of Medicine, Saint Vincent Hospital, Worcester, Massachusetts 01608, USA. david.spodick@stvincenthospital.com

Pacing and Clinical Electrophysiology : PACE
|May 9, 2009
PubMed

Interatrial block (IAB; P duration >or=110 ms) is a common electrocardiogram abnormality, which in addition to reduced left atrial function predicts atrial fibrillation and other arrhythmias. P terminal force (Ptf) +/- biphasic P in lead V(1)>or= the area of one small square on the grid also indicates left atrial abnormality, particularly left atrial enlargement, which is a strong correlate of IAB. Among 482 consecutively recorded electrocardiograms, IAB and Ptf were strongly and significantly correlated (chi(2)= 68.041; P

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