You evaluate a patient complaining of acute onset of dyspnea with hypotension and hypoxia. You immediately consider the diagnosis of acute massive pulmonary embolism, but despite your best efforts can't get good cardiac windows on bedside ultrasound. Should you administer thrombolytics? Heparin? Send the shocky patient for a CT? Today Dr. Simpkins goes through the steps to perform 2-point compression ultrasound of the lower extremity to evaluate for DVT, an easy and rapid bedside test that may allow for indrect but more rapid diagnosis of acute, massive pulmonary embolism.