ひつ
かなら
None
The slide coming out of the patient's heart is there because a mad scientist is testing to see if it's a good way to drain the body of blood. The patient is alive now... but they are definitely slated for certain death.
As the beeping heart thing starts to do one long continuous beeeeeeeeeeeeeep, the doctor puts his hands together and hits (ひつ) the dead patient over and over, attempting to bring him back.
Currently there are no similar looking kanji which exist in the WaniKani learning system