I guess I’ll ask my cardiologist about me wearing a halter monitor so she can make a diagnosisThe Apple Watch is rated as the gold standard and records 24/7. Since I also have Afib, I am curious as to the correlation. Last night it dipped as low as 38. I was an elite athlete for over 35 years up until my AVR in 3008. I still am an above average athlete but not as intense. The extremely high Heart Rate Variability is also concerning. Mine is always above 200ms, occasionally 300ms.