Back on bisoprolol 10mg once daily. At rest, sitting watching tv, in bed etc. my heart is around 57bpm to 59bpm sometimes little lower. Is this to low? Average from what I read is about 65 to 80. Should i be concerned or talk to my family doctor? My cardiologist doesn't seem to mind or say much. Just had a perfusion test, and a echo cardiogram, Spiro, loop to follow and back to see cardiologist. Guess I'll ask again depending on results, but maybe time for a new cardiologist for second opinion.