The video clip on the left was obtained in the cardiac cath lab as the
left coronary angiogram was recorded in the LAO/caudal 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 LAO-Caudal view, the LAD begins close
to the spine and then moves away from it and towards the left ventricular
apex. The Cx, in the RAO-caudal view, moves away from
the LAD and towards the spine before giving off its branches that curve
downwards and inferiorly running roughly parallel to the LAD. The
picture on the right (above) shows the image intensifier/camera (II) assembly
positioned in an LAO/Caudal projection. The picture on the left demonstrates
the view of the heart as "seen" by the II in this projection.