I believe it was cardiac. She had a history of Afib, and HF with an EF 20%, and was in afib during the code. I think based on the CXR, the MD determined it was pnuemonia and we had given her lasix 20mg and antibiotics about 30 minutes before. Not on any IV fluids, just the drip. She was AOx4, on 4 L NC 95% SpO2, breathing with retractions, but super pleasant. She started getting sweaty, so we checked her blood sugar and it was 60 so the MD said give D50 and then we sat her up because she said she needed to use the restroom, and then she went to into cardiac (?) arrest. She was at 0.05 on the drip. At the start of our shift, her BP was like 70s/50s, so we increased it to 0.07 I think and I guess she responded pretty quickly. But that's been my frustration with starting drips in ED. There are usually no parameters. Nurses seem like they're just winging it. Also, are pt's not allowed to eat while on levo (sincerely asking...there is so much I don't know!!)? She only was able to eat one bite of a sandwich and couldn't really tolerate it. Please help. Thank you.