Dissections following interventions in the infrainguinal arteries occur very frequently and are mostly under-appreciated on angiographic imaging. Media and external elastic lamina injury can contribute to loss of patency, and intravascular ultrasound (IVUS) can identify this type of injury. The circumference of injury also has been proposed to be a predictor of outcome. We therefore propose a classification combining depth of injury from intima to adventitia with circumference of dissection. This classification exhibits six dissection grades (A1, A2, B1, B2, C1, and C2) as seen on IVUS (the "iDissection" classification).
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