my 20 year old granddaughter has been having sharp pains in her heart for about a week now.  After the pains are over, she has a rapid heartbeat for about 30 seconds then it goes back to normal.  (usually once or maybe twice a day.)It happens when she is lying down at night.
Hi, I would advise your granddaughter to undergo holder monitoring. It is a test during which 24h ECG is recorded. In this case her doctor can see what's going on during night when she has complaints. Hope I could help nourishing you good health In case of further questions don't hesitate to ask