Covid and heart arrythmia after vaccination

A member of our group had to cancel a trip because he has Covid after getting the vaccine and is very ill. His heart is out of rhythm, 40 beats/minute. He is in hospital in Auckland where they will stop his heart to attempt to get it back to normal. He previously had covid in March 2020 and cured himself in 2 ½ weeks.

Is This NZ Based or Overseas? : NZ