I never passed out but even before my afib started I had a very low heart rate while resting. It was in the 30’s. This was picked while on a heart monitor while I was in the ER. I didn’t have any symptoms so nothing was done or said to me. After my afib diagnosis I needed to be cardioverted 4 times in 7 months. After the first cardioversion I was put on an anti arrhythmic medication. This wasn’t helping so it was decided that I needed an ablation. After that I started feeling like I was going to pass out. I told my ep and they put me on a heart monitor. I sent the monitor in and was waiting to hear back from them. During that time as part of ablation after care I was sending weekly EKG’s to my EP. It captured pauses in my heart rate. The office called to check on me. They contacted the heart monitor company to expedite the results. The following day the EP office called to set up me getting a pacemaker. My heart had 1400 pauses in 10 days. The longest one lasted 8 seconds. Since the pacemaker has been implanted I feel great! No more a fib or feeling like I am going to pass out.
Have you worn a heart monitor? Doctors can only help using information they have. I hope you get some answers. Good luck.