In Kent's aorta model most of the tears are transverse, or across the artery, in a section called the isthmus, and they start on the intima, or the inner layer of the aorta.
Everybody knows how Lipitor works, Hazlett argued, so the problem must be the study, which used a technique called carotid intima media thickness (CIMT) to measure the thickness of the walls of an artery in the neck.