The major anatomic variations of aortic
dissection as they appear on aortography.
A. The dissection originates in the ascending aorta, as in the left
panel in the diagram (Fig. 105g). Note the proximity of the false channel
to the right coronary artery as well as the aortic regurgitation that
results from loss of support of the valve.
B. The dissection begins distal to the left subdavian artery, as in
the center panel of the diagram. The laterally placed false channel
is less well opacified than the true lumen.
(From Lindsay J Jr. Aortic dissection.
Heart Dis Stroke 1992; 1:69. Reproduced with permission from the publisher