My name is Andy I am 34 years old and I have had paroxysmal AF for about 3 years (known), I am on Flecainide 100mg x 2 per day. I do a lot of high intensity exercise and have noticed that my medication isn't working as well as it used to i.e. heart rate reaching 220bpm, and not going any lower than 150 when recovering. Previously while doing high intensity training it would be caped around 150bpm with a normal recovery. This is probably 3 in 10 training sessions and happens very randomly. Ive tried taking my dosages at different intervals. 0900 and 1700 also 0700 and 1900 but still get very random results.
I've considered upping my dose and also getting a beta blocker, (id talk to cardiologist first of course).
The AF is really holding me back. On a good day I can run easily 5 miles at 7.45min miles with normal heart rate of around 150bpm on a bad day I can barely run 10 min miles and have to stop regularly just to catch my breath as heart rate over 200bpm.
All I’m looking for is some advice really would beta blockers help? Should I get a high dosage of flecainide? I am due to run a 20mile obstacle race, but my training is so sporadic due to AF I am unable to get the miles in my legs. I don’t want AF to ruin my active life.
Thanks for reading