You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Manifestations of acute dissection include all of the following except and explain in detail?
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