Thanks for this. Especially the Nepal trekking reference. I had a pulse field ablation 5 weeks ago at age 72, after 3 years of almost daily episodes. Vigorous exercise was a major trigger for me and stopped me in my tracks in Nepal at 3400m. I had done 5500m several times pre-afib. After 5 weeks I’m in NSR so far and have been wondering if a return to Nepal trekking was realistic. Your post gives me some hope, although I’m still on a beta blocker and antiarrythmia med (plus Eliquis) so my heart rate remains low and I think that will remain a limitation for me at higher altitudes.