Thank you -II will continue asking as I am not ready nor do Ithink I need a pacemaker or Beta blockers.
I can't give any direct help, but maybe some questions and answers will give "us" more of a chance to understand/relate.
1) You say active? Does that include aerobic exercise such as running, hard hiking, and biking?
2) Do you have any history on your aerobic HR? Assuming some yes to the above.
3) I don't recognize the medications you are on, are they related to bradycardia treatment or other rhythm abnormalities.
4) Is the family history the same in each case? Sudden cardiac arrest for example. Was there blockage problems?...
One observation, a medical decision to stop a stress test deserves a complete explanation from your doctor, hope you got one.