Table 3. High-risk features of aortic complications in type B PAU.

High-risk feature	Cut-off or sign of complicated evolution
Symptomatic patient	Symptoms despite medical treatment or haemodynamic instability (7,9,23)
Asymptomatic patient
Periaortic bleeding	Presence (23,39)
Pleural effusion	Significant/progressive (23,39)
IMH-associated	Presence of IMH (23,39)
Initial PAU size	Large initial depth or high growth rate size (23,39)

IMH, intramural hematoma; PAU, penetrating atherosclerotic ulcer.