• ↑↓ to navigate
  • Enter to open
  • to select
  • Ctrl + Alt + Enter to open in panel
  • Esc to dismiss
⌘ '
keyboard shortcuts

up:: Biology


Patent foramen ovale pfo

A patent foramen ovale (PFO) is a hole in the heart that didn’t close the way it should after birth. The small flaplike opening is between the right and left upper chambers of the heart (atria).