I need a bit of help with the following scenario: My character is a very fit 26yo female (not sure if it matters, but she's tall/muscular, i.e. her heart is bigger, for what it's worth) and she ends up almost drowning when she gets knocked out while on an underwater demolition exercise. The explosive device detonates prematurely, and the explosion is big/close enough to cause unconsciousness (the explosion and the character are both underwater), but she's far enough to not suffer other injuries (and she's also wearing some protective gear). I'm still looking for info/asking around whether it's possible for an underwater explosion to cause unconsciousness without causing other physical injuries, but I haven't yet found anything definite (if anyone here knows, feel free to chime in). Anyway, since it's an exercise, her team and NCO are close in a rubber boat, ready to help (the NCO knows CPR and they have an automatic external defibrillator). Since the exercise takes place at night and in bad weather (on purpose), it takes a moment before the others reach her while she's floating face down. Her diving partner also gets dazed, but remains conscious. He reaches her in roughly 30 seconds or so. Their team mates dig them out of the water about 60 seconds after the explosion and the resuscitation starts between 60-120 seconds. She has probably inhaled some water (anyone want to hazard a guess how much?) during the explosion/the 30 seconds (or so) she spent unconscious underwater/face down. They start CPR immediately when they don't feel a pulse/notice she's not breathing. This is where I'm out of my depth (sorry!). What's the difference between cardiac arrest rhythms ventricular fibrillation, pulseless ventricular tachycardia, and asystole? What's more likely in such a situation? From what I've read, they don't defib asystole, but they do with the other two (do they use epinephrine with the other two as well?). If it's not asystole, I've understood that since the CPR starts in 1-2 minutes and they do have a defibrillator as well as people who know CPR, her chances of survival are roughly 80%. Now, how does a person's body react do defib? I doubt it's the dramatic, back-arching spasms of TV. If they use pads that stick to the skin, would they be placed on front and back or just on front? There's some waves, so would the tricky circumstances affect the placement of the pads/paddles? How many shocks does it usually take in such a situation (note: the effects of the explosion/KO have already worn off at this time, so she's unresponsive because of the stopped heart and lack of breathing)? When a patient wakes up from such a condition (after they get her heart going again), would she still have the water in her lungs or would she cough/puke it out during the CPR despite the stopped heart, like a reflex or some such? Or would the expulsion of water happen after a successful defib? Do they need to "get" the water out of her somehow, e.g. by turning her on her side or something? How long does it generally take for the patient to become lucid again to the degree that she knows her own name, what year/month it is, recognizes her team mates etc? What should the person(s) administering the CPR do as soon as she wakes up? Let her lie on her back or turn her on her side? When they get her to the paramedics, what would they do to her first? Put on an oxygen mask, an IV, something else? I don't need much, just a few details the POV character can observe before she's hauled into the ambulance. How big of a difference does it make whether she's inhaled salt or fresh water? If salt water causes bad complications and keeps her out of commission for long (e.g. longer than a few weeks), I can always change the location into a lake or some such. How long would she be hospitalized after such an accident? How long before she could return to active duty? Rough estimates are fine here. Also, when her CO goes to check on her (after she's stable etc), what "hospital gear" would she have on her, i.e. IVs, tubes up her nose etc? Btw, would what I've described her count as being clinically dead? Thanks in advance!