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A shallow LAO view with a 25 to 45 degrees cranial angulation
is a superior view for:
- displaying the origin of the RCA and its shaft.
- It reduces foreshortening of the right
Posterior descending coronary artery and "un-stacks" it from the right
Postero-lateral branch.
- It may also clearly demonstrate the proximal
portion of the acute marginal branch.
- A deep held inspiration is needed to
clear the diaphragm and improve image quality.
- Indeed, this view usually offers so much
more information than the "straight" LAO view that it has become the
LAO view of choice for some cardiac cath labs.
In the Left Anterior Oblique or LAO view, the camera is
rotated along a vertical axis towards the patient's left. Please
note that the ventricular septum lies in a plane between the right shoulder
and the left nipple. In the LAO/Cranial view, the camera "looks"
at the edge of the septum from above. The outline of the atrio-ventricular
plane is roughly at right angles to the ventricular septum. When
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