Hi from Australia, I’m in my 60s had a pacemaker implanted almost 2 years ago to deal with a 2nd degree block that was flaring up when my hr was up at 160bpm for more than 10min while cycling. I would feel dizzy & My hr would drop suddenly to below 80 & l would loose power.. however since the pacemaker things have been a little better and although trying numerous settings on the pacemaker I still have the problem. I have tried various stress tests that never replicated the problem. The cardiologist suggested the forntier x. I have now captured a number of eposoides & shared those with the cardologist who has now used this data and adjusted the pacemaker in CLS… its only been a week but a better rythm & no hr drop, however sustaining 160 bpm for long periods and showing up as high heart strain…. the frontier has wotked well with the pacemaker.. anyone else had similar problems?