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Apr 10, 2006 · The term Acute Aortic Syndrome (AAS) is used to describe three closely related emergency entities of the thoracic aorta: classic Aortic Dissection (AD), Intramural Hematoma (IMH) and Penetrating Atherosclerotic Ulcer (PAU). Clinically these conditions are indistinguishable.
Jun 12, 2024 · Aortic intramural hematoma (IMH) is an atypical form of aortic dissection due to a contained hemorrhage into the aortic wall usually from the vasa vasorum without an intimal tear. It forms part of the acute aortic syndrome spectrum along with penetrating atherosclerotic ulcer and classical aortic dissection. Epidemiology.
Aug 31, 2016 · The inciting event in IMH is rupture of the vasa vasorum, causing bleeding into the aortic media; IMH can progress to acute aortic dissection if the intimal layer ruptures, with the creation of an entry tear.
Feb 11, 2014 · Intramural hematoma (IMH) is a life-threatening aortic disease included within acute aortic syndrome, together with aortic dissection and penetrating aortic ulcer (PAU). 2, 3 IMH is a contained aortic wall hematoma with bleeding within the media but without initial intimal flap formation (Figure 2). 3 Its natural history is variable; it may be r...
Nov 2, 2022 · AAS are life-threatening conditions in which there is a breach in the integrity of the aortic wall. The most common AAS are aortic dissection, intramural hematoma (IMH), and penetrating atherosclerotic ulcer (PAU), all of which can lead to rupture .
Jan 14, 2023 · Intramural hematoma (IMH) (Fig. 1c) is a similar entity to acute aortic dissection but lacks two criteria seen in frank dissection: an evident intimal tear and a perfused false lumen .
Aug 16, 2016 · AAS, including aortic dissection (approximately 90% of cases) and intramural hematoma, may be complicated by poor perfusion, aneurysm, or uncontrollable pain and hypertension. AAS is uncommon (approximately 3.5-6.0 per 100,000 patient-years) but rapid diagnosis is imperative as an emergency surgical procedure is frequently necessary.
