Dissecting aneurysm of the aorta type I - Color Ultrasound
Title: Color Ultrasound - Dissecting aneurysm of the aorta type I
Diagnosis: Dissecting aneurysm of the aorta type I
Author: Dr.ROSSET Antoine
Comment: Dr. KHAN Haleem
Chapter: Vascular System
Clinical Presentation: Annual work-up of a patient with a type I (DeBakey
classification) dissecting aortic aneurysm treated by betablockers.
Comment: In a dissecting aneurysm of the aorta, a rupture of theintimal layer and
the superficial media is noted with creation ofan intimal flap. Blood jets through this lesion
creating a falselumen which may or not communicate with the true lumen.Complications
include rupture, embolization and occlusion ofvisceral or renal arteries. 2 clinical
classifications exist whichtake into account the portion of the aorta which is involved.
TheDeBakey classification : I) Ascending aorta and abdominal aorta II)Ascending aorta III)
Descending aorta The Stanford classification:A) Ascending aorta B) Descending aorta CT
and MRI are themodalities of choice for delineating the extent of the aneurysm
anddetermining the extent of the false lumen and the complications indissecting aneurysm.
Description: The B mode scan shows an enlarged aneurysm of theabdominal
aorta with an intimal flap. The dissection extends intothe superior mesenteric artery(SMA)
and to the aortic bifurcation.The CD perfectly demonstrates the flow in the true and false
lumen.The false channel is also seen in the SMA. These findings wereperfectly correlated
to the enhanced CT.
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