Another change in medication

I received a call from my cardiologist's office this morning.  They have been monitoring my heart (from the implant in my chest) and found that my heart rate sometimes gets too low.  So, they reduced the dosage of the medication I am taking that slows it down.  Apparently, the device does not have a GPS, because they did not say anything about how slow I'm running.  Anyway, I hope the reduced dosage will result in a corresponding reduction in side effects.  I went to the park this evening and ran 2 miles on the roads.