Interatrial block can occur in the absence of left atrial enlargement: New experimental model
María José Guerra Palmero, Gemma Vilahur, Antoni Bayés de Luna, José Ángel Cabrera, Manuel Martínez‐Sellés, Guiomar Mendieta, Adrián Baranchuk, Damián Sánchez‐Quintana
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.
Topics & Concepts
MedicineCardiologyLeft atrial enlargementInternal medicinePericardiumBlock (permutation group theory)Sinus rhythmAtrial fibrillationGeometryMathematicsCardiac pacing and defibrillation studiesCardiac electrophysiology and arrhythmiasCardiac Arrhythmias and Treatments