The video clip on the right was obtained in the cardiac cath lab
as the right coronary angiogram was recorded in the RAO projection. The
movie clip demonstrate both a "video" representation (coronary angios,
as they appear on playback in the cath lab) and the "cine" or cineangiographic
equivalent as seen on the developed film. The two views correspond to
the negative and positive prints of photography film. You can toggle back
and forth between the two views by clicking on the respective button.
You can also click a button to see a labeled freeze frame of the coronary
In the RAO view, the RCA begins close to the spine and then runs
roughly parallel to it. The posterior descending and postero-lateral branches
come off the RCA at nearly right angles. The photograph
on the above left shows the x-ray tube, image intensifier/camera assembly
in the RAO projection. The display shows that it is in the 30 degrees
RAO angulation with no caudal or cranial tilt (0 degrees). The photograph
on the top right shows the camera's view of the patient's torso and heart.
The size of the latter has been exaggerated for purposes of illustration.