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. Aoic dissection occurs when blood splays apa the laminarplanes of the media to form a blood-filled channel within theaoic wall.The clinical manifestations of dissection depend primarily on the poion of the aoa affected; the most serious complicationsoccur with dissections involving the proximalaoa and arch.Thus, aoic dissections generally are classified into two types-Proximal lesions: type A dissections, Distal lesions,type B dissectionsRobbins Basic pathology,9th edition,pg no.347