Hello. Thank you for your question and welcome to HCM. I understand your worry. If you have not had angina in the past (angina is the chest tenderness or heaviness produced by a narrowing or blockage in one and/or more coronary arteries), then this can come from the CPR. If the chest discomfort you are sensing these days, have become notable by you these days, after the CPR, then this may be a pain from the ribs. There is a certain trauma to the ribs when we apply CPR manually (hand-massage of the heart), and even rib-breaking is not uncommon. If this is the case, I suggest you to take non-steroidal anti-inflammatory steroids (NSAIDs), a drug from this class would alleviate your pain. Also, I would recommend you to do a plain chest X-ray, to confirm or exclude the ribs as the origin of the pain. If you have had angina in the past, then I recommend you to a cardiac check-up, adding the age to the problem. Therefore, a consult with a cardiologist, and performing EKG, echocardiogram and a cardiac stress test, would be in order. I hope I was helpful with my answer. Take care. Kind regards, Dr. Meriton