Conversation: The conversation between human and AI assistant.
[|Human|] My uncle had triple bypass surgery about a 2 months ago. Today, he had chest pain and he is really dizzy. The doctor told us to take him to the emergency room. What could be causing this chest pain and dizziness? He was not doing anything that would cause a problem and he has been taking the medication prescribed.
[|AI|]  Hello, I understand your concern and would explain that his symptoms could be related to different possible causes: - gastritis or gastric ulcer-coronary artery disease (blockage of the grafts)- pulmonary embolism, etc. For this reason, it is important going to the ER for a physical exam and some tests:- a resting ECG and cardiac enzymes- a chest X-ray study-complete blood count, PCR, ESR - D-dimer plasma levels for pulmonary embolism.  Hope I have answered your query. Let me know if I can assist you further.