Today marks the 4th anniversary of the EM Basic podcast.  To celebrate this occasion, we are going to do a screencast on aortic dissection.  This is a very challenging disease to diagnose because patients have lots of different presentations that can make it difficult to diagnose.  We'll talk about the common presentations of dissection, the not-so-common presentations, how to order the right imaging, how to treat these patients in the ED, and how to get them to the right level of care.