I was diagnosed with POTS & vasovagal today. My heart rate was all over the place due to my high anxiety. Usually at home it's usually in the 60-70s. It's been in the 50s and 39 while sleeping. It's never over 90 unless I'm having anxiety or a vaso attack or when I stand from sitting. Relaxing at home it's always normal range. My BP is too low when laying down. When sitting it's normal. When I stood up it dropped to 80/50. They gave a different med for that. Pharamicist seemed concerned about the metroprolol.