Key result
Acute type A intramural hematoma was associated with a 30-day mortality of 11.9% after aortic repair, which was not significantly different from the 16.1% mortality seen in typical acute type A aortic dissection.
Why the study?
Acute type A aortic intramural hematomas remain debated regarding definition, management, presentation differences, diagnosis, and risk for progression.
Does delayed surgical repair improve outcomes in patients with acute type A intramural hematoma?
Does delayed surgical repair improve outcomes in patients with acute type A intramural hematoma?
Absolute Event Rate: 11.9% vs 16.1%
p-value: p=0.289
A delayed surgical approach (beyond 72 hours) for stable acute type A intramural hematoma yields favorable operative outcomes comparable to emergent surgery for acute type A aortic dissection.
Acute type A IMH management remains debated with regional differences; leaves open optimal individualized strategies pending prospective data.
Acute type A aortic intramural hematomas (IMHs) are often included under the spectrum of acute aortic syndromes. The classical definition is the presence of hematoma in the media without identifiable intimal tear. Dissection occurring within two weeks of presentation is defined as acute. Acute type A IMH remains a subject of debate, especially regarding its definition and management. The classical theory of pathogenesis of IMHs is ruptured vasa vasorum in the aortic media. However, the majority of IMHs are now detected with an intimal defect using high-resolution computed tomography and intravascular ultrasound, which implies that IMHs may be a subset of aortic dissections (ADs), with very limited flow in the false lumen. Much controversy remains regarding IMH differences in presentation, diagnosis, and risk for progression. Geographic location and ethnicity, especially Asian vs . Western, possibly affect the natural history and outcomes of acute type A IMH. In this review, we describe the pathophysiology and management strategies for acute type A IMHs.
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Rstum et al. (2019) conducted a review in Acute type A intramural hematoma and acute type A aortic dissection (n=523). Acute type A intramural hematoma vs. Typical acute type A aortic dissection was evaluated on 30-day mortality (p=0.289). Acute type A intramural hematoma was associated with a 30-day mortality of 11.9% after aortic repair, which was not significantly different from the 16.1% mortality seen in typical acute type A aortic dissection.
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