Now we saw on the video on myocardial infarctions or heart attacks that sometimes, one of these plaques might become unstable and they break off and then you have a complete blocking of a vessel, and we called this -- if it's an embolus... and remember that an embolus is something that is just floating around and eventually blocks a vessel, and if it was a due to a ruptured plaque that also had clotting factors around it when it was released, then we would call this a thromboembolism.