My hubby went thru that 3 times Finally I said when is enough enough. They finally did xyars ans found he could not pass them. They operated 2 days in hospital . They released him and low and behold he was in trerrible pain again. The stint they put in had moved. Back to hospital. Filled him with pain meds and replaced the stint. Be assertive and make sure you know what is going on. ASK A LOT OF QUESTIONS, He is all better from that now. 3 years later.