<s>[INST] I had been having chest burning pains and had an EKG. It came back abnormal. I had a heart cathrization and Ihad 20% plaque. Now, I am having pain in my right side and burning in my below chest area. It lasts for about 2 hours. Should I get and upper or lower GI? [/INST] Hello. Thank you for asking on Chat Doctor. I understand your concern. The features of the pain that you described, are more likely to have an esophageal or gastric origin. In my opinion, I would recommend that you had some changes in diet, as a first step. I am referring to all the food and other materials that can irritate gastric mucosa and overstimulate acid production, such as:- caffeine, tea (Anthony derivatives)- chocolate-spicy food-grilled food-tobacco, alcohol etc. Also, you should have your last meal at least 90 minutes before you lie down and check the Helicobacter pylori in stool. If these measures don't work, then I recommend a trial with a protein pump inhibitor (PPI) Chat Doctor.  If the symptoms persist, then go ahead with the upper gastrointestinal endoscopy. I am not saying it is counterindicated to do it right away, but my opinion remains that you should undertake the above-mentioned changes first. I hope I was helpful. Regards. </s>