Is it normal heart beat?

[tinylady2021]

I started having of tachycardia whenever I moved while I sleep. The average 115 beats per minute. My cardiologist said it is normal. It is bothering me because I know the normal heart beat from 60 to 100.

Should I worry? Should I go for second opinion?

[Hidden]

I would imagine it depends on which sleep state you are in, in REM it can change - "When you dream, you enter the sleep phase known as REM (also known as dreaming sleep). “Your heart rate can vary quite a bit during REM sleep because it reflects the activity level occurring in your dream. If your dream is scary or involves activity such as running, then your heart rate rises as if you were awake,” says Dr. Epstein."