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
[{'content': 'Beta-blocker therapy after acute myocardial infraction is contraindicated in which of the following conditions? \nSelect and explain. \nA. Hea Failure, B. Ohostatic hypotension, C. Paptic ulcer disease, D. Bronchial asthma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Medications that affect the autonomic nervous system may also cause ohostatic hypotension. Beta blocker medications such as metoprolol (Inderal) block the beta-adrenergic receptors in the body, preventing the hea from speeding up, preventing the hea from contracting as forcefully, and dilating blood vessels. Ref Davidson edition23rd pg 463', 'role': 'assistant'}]