<prompt> All of the following factors predispose to Aoic dissection, Except:Systemic hypeensionCoarctation of aoaIn Ist trimester pregnancyTakayasus aeritis  <response>: Answer is C In 1st trimester pregnancy Aoic dissection is predisposed during Third trimester of pregnancy and not during the first trimester of pregnancy Risk factors Predisposing factors for Aoic Dissection Systemic Hypeension and cystic medial necrosis Connective Tissue Disorders - Marfans Syndrome - Ehlers Danlos Syndrome Inflammatory Aoititis - Takayasu aeritis - Giant cell aeritis Congenital Aoic Valve abnormalities - Bicuspid Aoic Valve Coarctation of Aoa Aoic trauma Third trimester of pregnancy 