I too had an ablation.in March and after the blanking period I have felt pretty good until this heat wave struck the Northeast. I play golf a few days a week and despite riding in a cart I got pretty worn out after a recent round. The next day, sure enough, AFIB again according to my smart watch and the way I feel. I feel better today though and I am dropping out of my golf game today as it will be over 90F with poor air quality. It seems to me that the heat is a definite factor in inducing the arrythmia.