My cardio recently added 2 new blood pressure meds to my other 2, verapamil and hctz(diuretic) he added lisinopril and coreg, i've noticed at night when i take my bp, my pulse runs in the 40-50's while resting,not resting its about 65, after having a month straight of very high pulse rates of 160+ i'm a little concerned about it being low, i have previously had problems with my potassium and that causing irregular HB...how low is to low? when is a good time to mentiont to my cardio the sudden drop in hr?