hi, what happens if somebody’s heart is beating to fast or beating to slow??

Question: hi, what happens if somebody's heart is beating to fast or beating to slow??
- Keywords:
  fast,
  heart,
  heartbeat,
  slow
Asked by anon-182548 to Laurent on 22 Jun 2018.
- Laurent Dupays answered on 22 Jun 2018:
  
  Hi Jessica, surprisingly if the heart beats too fast or too slow what can happen is that it can stop to beat all together! It won’t happen if it just beats too fast because you are doing sports. It is a problem when it beats too fast even if you don’t do anything

Question: hi, what happens if somebody's heart is beating to fast or beating to slow??