Blood / Fluid Flow?

I got awakened from my dreams and sleep several times without recording my dreams, after that I kept going back to sleep for short periods of time, and so I can only barely remember part of one dream that my mind kept trying to remember as it continued to fade each time that I woke up and I went back to sleep.

All that I can remember of this dream is that I assume that I was working at The BP Library, maybe a fictional version, and there was something confusing and unclear that was going on that possibly involved blood flow and / or fluid flow in maybe the chest / heart area and maybe something else.