Hi, 26 years old male here. In decent health, I used to smoke,I drink occasionally, but I also eat pretty healthy and lift weights a few days a week. 5 8 158 pounds if that matters. For the past 7 years I have suffered with random runs of PVC s and occasional tachycardia for no apparent reason. I never really knew what my resting heart rate was when I was younger. After a really bad episode of PVC s that lasted for days (after a night of drinking), I went to a cardiologist and was put on beta blockers. These seemed to help for the first few years but recently my heart rate has begun to dip to around 45 at night. My resting heart rate during the day is often around 52-56. Nobody else in my family has a resting heart rate that low. My parents have been runners for the past 15 years, yet they both rest in the high sixties to low 70 s. My twin sister has a resting heart rate in the low 70 s as well. Anyways, I constantly feel very run down, for about the past year at least, and aside from randomly fluctuating blood pressure and the slower heart rate, nothing has changed in my life. My doctor ordered a sleep study and it was found that a had somewhat frequent hypopnea with occasional obstructive sleep apnea, overall it was diagnosed as an ahi of 5 mild apnea. I know that sleep apnea often causes bradycardia at night, but does it also cause bradychardia during the day? Often while sitting at work during the day it will dip into the mid 40 s briefly. When this happens I usually get pretty tired feeling, sometimes I get a strange pressure in my head. Very rarely I will feel nausea. I know it s not low enough to warrant a pacemaker, but I feel like it s really affecting my quality of life. I guess I m asking is, do you think the mild apnea if treated will reverse the daytime bradychardia? If not, is there a number like 40 bpm that a doctor determines when to put in a pacemaker?