Hello there and thank you for your question. We're sorry you are having this difficulty. More details would be helpful. How many times has your stents collapsed and how much time passes in between? Are they collapsing or become reblocked? Once expanded, stents are quite strong and don't tend to collapse readily. Collapse of a stent are usually the result of either in-stent thrombosis (via platelet activation) or restenosis (occlusion from endothelial tissue). The former is usually more catastrophic and results in an acute heart attack, and more often the result of noncompliance with taking certain medications (i.e. clopidogrel)