Bradycardia

The sleep study,and recommendations from it, seem to be help for you in the near term.

You might keep notes of your sleep, heart rate, oxygen, headaches, etc., to show the sleep lab.

Best wishes

What is your heart rate during the day? Has your cardiologist considered a pacemaker.

Low HR at night is normal and desirable. It 'should' mean you're in good health and your heart needn't be alerted or aroused often to keep you alive autonomically. However, there is such a things as bradycardia, and it usually results in feeling off, unwell, breathless, maybe fainting or feeling dizzy. Before it gets that bad, you should seek help and get assessed. You may find a pacemaker is in your future. You and literally millions of others around the globe. Millions upon millions.

You might have sleep apnea, but that would normally be accompanied by a rapid heartbeat as your heart is responding to low oxygen levels and trying desperately to keep you alive. So, a low heartbeat would seem to rule out apnea, although the formal diagnosis would still be a good idea. We're all different.

My sleep study showed Very low air flow / oxygen recommended Cpap
Results Great air flow now

My dad and I live in SE Asia. Our local pharmacist provides lower end medical advice and prescriptions. It's our first line of defense. He suggested an oxygen generator, as my dad's episodes of low O2 were noticed during the day and the oxygen was an immediate fix. I have no idea what western doctor would say about this, but for my dad it has worked quickly on the few occasions that he has felt lightheaded and dizzy. His O2 reading is usally around 80-82. It was expensive for us, around $900 US, but dad is happy with it.

I am sorry to hear that you are having to experience that. I know how that is to wake up with migraines. And early 2024, I went to the hospital with a fib w/tachycardia. When the doctors converted me, my heart paused for eight seconds. The doctor said that they couldn’t leave me like that, because I also have bradycardia. The next time I would be converted could be my last if my heart didn’t start again. So they told me I couldn’t have a regular Pacemaker because of the leads and I had had endocarditis previously. So, I had to have a leadless Pacemaker placed in my ventricle. Later, I had to have a dual chamber leadless Pacemaker put in my atrium. It keeps my heart at 60 or above. That gives me more energy and helps me be able to think clearly. Hopefully you will talk to your cardiologist, if you have one and see if you don’t qualify for something like that. I hope everything works out well for you.

My resting heart rate usually 45-60. Doesn't seem to be a problem. 78% O2 very dangerous. Last time mine was that low (didn't know it, just felt terrible and close to passing out). Cab driver helped me into an ER, sepsis from defibrillator installed with cooties laid me low, one month in hospital with tubes of antibiotics, one month at a friend's house with PICC lines administering the same. Surgeon who removed defib said it was covered in staph bacteria. Also asked if I wanted a new one. Nope. Been getting better without having one. Worked up to 45 minutes on treadmill at max grade and 4 mph. Kept me alive longer than guesstimate I got from doctor of 2-4 years.