PVT is short Polymorphic Ventricular Tachycardia.
IRB is short for Institutional Review Board.
Infiltration of air and bacteria can lead to "fizzy urine."
Anorexic patient, Louisa DeLeon, is played by Reiko Aylesworth, who previously played Malia Waincroft on Hawaii Five-0 (2010). Malia was married to Chin Ho Kelly, played by Daniel Dae Kim, a producer on this show.
Actors Nicholas Gonzalez, who plays Dr. Melendez, and Bryce Johnson, who plays Wade (the gastric bypass patient), played detectives on Pretty Little Liars (2010), though not at the same time.