Classification of aoic dissection depends upon?: (A) Cause of dissection, (B) Level of aoa affected, (C) Percentage of aoa affected, (D) None
Answer is B. Ans. is 'b' i.e., Level of aoa affectedClassification of Aoic dissectiono The risk and nature of serious complications of dissection depend strongly on the level of aoa affected, with the most serious complications occuring from the aoic valve to the arch.o Thus aoic dissections are generally classified into two types -1. Proximal lesion (Type A)o More common and more dangerous.o Involve either the ascending poion only or both ascending and the descending poion of aoa.2. Distal lesion (Type B)o Involve only discending pa distal to subclan aery.