Thank you for the info. No, she has not had any light headedness or fainting. She said she felt no difference this morning when her heart rate was dropping so low. She had a stress test (chemical) a few weeks ago along with an echo and it came back normal.
A rate that low is called "bradycardia." There are a few different causes but primarily she needs to find out how often it occurs and whether she'll need a pacemaker. That would keep her heart rate up where it belongs. Has she mentioned having any light headedness or fainting?