This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
Manifestations of acute dissection include all of the following except 
Select and explain. 
A. Pericardial tamponade, B. AR, C. MR, D. AMI
C: MR
Answer: C: MR 
Explanation: Ref Harrison 19 th ed pg 1640 Hemopericardium and cardiac tamponade may complicate a type A lesion with retrograde dissection. Acute aoic regurgitation is animpoant and common (>50%) complication of proximal dissection. An electrocardiogram that shows no evidence of myocardial ischemia is helpful in distinguishing aoic dissection from myocardial infarction