Dr. Kim Lewis (Critical Care Fellow, McMaster University) takes us through the approach to a patient with suspected massive pulmonary embolism. Stay tuned for five take home points to remember when treating a patient with this medical emergency as well as recommendations form Thrombosis Canada. As always, we post an associated infographic at www.theinternatwork.comGuest Fellow: Dr. Kim Lewis (Critical Care Fellow, McMaster University)Faculty reviewer: Dr. Waleed Alhazzani (Intensivist and Gastroenterologist)