ultrev ch.7 - Abdominal Vasculature True Aneurysms: 3...

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Abdominal Vasculature True Aneurysms: 3 layers – adventitia, media, intima - MC cause is arteriosclerotic disease - Most aneurysms are in distal aorta (infrarenal), typically fusiform False Aneurysms (Pseudoaneurysms) – result from trauma to vessel wall, connects to the native artery, bidirectional waveform is seen at the stock. Surgery, thrombin Dissecting Aneurysms – is a separation of the intima from media of ao wall - associ. – chronic hypertension, connective tissue disorder (Marfan’s), trauma Mesenteric Ischemia – presents as recurring postprandial abd pain, and weight loss - SMA occlusion – SMA velocity >275 cm/sec, CA velocity >200 cm/sec Arteriovenous Shunts – abnormal connection between artery and vein. . pulsatile venous flow, low resis flow Celiac Axis Compression Syndrome – aka – arcuate ligament compression syndrome. On expiration, the median arcuate ligament compress the ventral aspect of the celiac axis producing significant stenosis. During inspiration, stenosis disappears.
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ultrev ch.7 - Abdominal Vasculature True Aneurysms: 3...

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