Can long term atrial bigeminy that has been diagnosed as benign cause any damage to the heart over time or increase mortality risks over time?. I feel I have a new rhythmn pattern that is almost constant, a regular irregularity, that is diagnosed as benign atrial bigeminy. Has anyone ever had a change of rhythmn that was constant? I am assymptomatic except that I feel the new rhythmn and am taking meds to treat symptoms. Any help would be much appreciated.