Left Anterior Oblique View for Evaluation of Left Atrial Size
The left anterior oblique film of the chest provides a sensitive and accurate gauge of left atrial enlargement. The posterior wall of the atrium, which distends when the chamber enlarges, is seen in profile in this view. Dilatation of the left atrium is almost always reflected by this segment which assumes a convexly, curved contour. This finding is independent of most of the conditions that can alter the other roentgen signs of left atrial enlargement.
- © 1971 American Heart Association, Inc.