Manifestation of Left Atrial Events and Interatrial Frequency Gradients in the Surface Electrocardiogram During Atrial Fibrillation: Contributions from Posterior Leads

Background: In most patients, atrial fibrillation (AF) is initiated and maintained by pulmonary vein foci, but the relationship between left atrial (LA) events and the surface electrocardiogram (ECG) is largely unknown. We investigated whether LA events are reflected in the surface ECG and whether additional information can be obtained from recording posterior leads in patients with AF.

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