we're going to use one of these more potent anticoagulants and you can imagine those are a little more dangerous they have higher bleeding risk they need a little bit more monitoring in general so those are the typical choices here's some studies so we've been involved in several of these over the years saying that if you have one of these heart conditions like atrial fibrillation that aspirin works but the stronger blood thinners like coumadin which is also known as warfarin they work better okay the way that warfarin was discovered is