ACUTE MI -PT/INR results! I need explanation!

It would be great if you had the clinical experience to SEE what happens sometimes with blood. When you draw blood the specimen is a very viscous fliud. I have seen blood clot immediately in the tubes. When you draw a Pt/PTT/INR its in a blue tube is has a chemical additive in it. the reason you must fill the tube to a certain level is to get the correct ratio of 3.2% sodium citrate to blood specimen. This directly effects clotting time. If a specimen clots relatively quickly, then this can be indicative of a person having an MI cause by a blood clot. This is the exact reason we pump people full of anticoagulants in the cath lab.