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Updated: Dec 26, 2025
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Published on: August 16, 2016
Interatrial block can occur in the absence of left atrial enlargement: New experimental model
Jose M Guerra1, Gemma Vilahur2, Antoni Bayés de Luna3
1Cardiology Department, Hospital de la Santa Creu i Sant Pau, Institut Investigació Biomèdica Sant Pau, Universitat Autònoma de Barcelona, CIBERCV, Barcelona, Spain.
Abstract:
We present the surface electrocardiogram of an open-chest anesthetized healthy adult swine after direct application of ice at the transversus sinus of the pericardium where the Bachmann's region is located. Gradual and transient interatrial block (IAB) in the absence of structural atrial disease is described. This new experimental model demonstrated that IAB is an independent entity from left atrial enlargement.
