Left Atrial Enlargement

To best understand ECG features of biatrial enlargement, it is recommended that you first review ECG changes seen in left atrial enlargement and right atrial enlargement. Biatrial Enlargement Definition Biatrial enlargement is diagnosed when criteria for both right and left atrial enlargement are present on the same ECG. The diagnosis of biatrial enlargement requires criteria for LAE and RAE to be met in either lead II, lead V1 or a combination of leads ECG Criteria for Biatrial Enlargement The spectrum of P-wave changes in leads II and V1 with right, left, and biatrial enlargement is summarised below: ...

Left Atrial Enlargement Left atrial enlargement (LAE) is due to pressure or volume overload of the left atrium. LAE is often a precursor to atrial fibrillation. Also known as: Left Atrial Enlargement (LAE), Left atrial hypertrophy (LAH), left atrial abnormality. P wave changes with Left Atrial Enlargement ECG Criteria for Left Atrial Enlargement LAE produces a broad, bifid P wave in lead II (P mitrale) and enlarges the terminal negative portion of the P wave in V1. ...