Had a 65 year old woman in the er last night with an initial c/o leg pain (s/p fx tib/fib). As time went on...

the pt. developed n/v and kept trying to poop in the bedpan (I can't go!) Pt was then found to be hyperkalemic w/ K+ of 6.8, so dr. decided she better be admitted to tele as obs. I moved her, so that I could put her on a monitored bed, and since tele could not take report (imagine that!), we kept her. She was on the bedpan a few times in the interim, and eventually had a lg. bm. Approx. 2 hrs after I had her on the monitor, she became extremely cold and clammy, her b/p went from normal to 60-70/30's and HR went to as low as 33. (I should mention that she has a hx of copd, chf, dm, seizure disorder, breast ca). co2 was 88. she was really acidotic. We eventually got her to icu, and I went home. This lady also presented to the ed 2 wks prior (from the orthopod's office) with n/v/d. When I triaged her in the room, she was also cold and clammy, and I put her on the monitor. That time her HR was 26. I don't remember the b/p, but remember that it was low.
Question is: can someone vasovagal themselves down so far? I would expect a low b/p, but would rather expect a high HR, not low. I'm not sure how else to explain what's going on with her, and had today off. Any suggestions? Interesting