<s>[INST] I have uneven heart beat that is lasts for hours and days on end. The heart beats normally for a few beats have a strong beat, halt for a longer period then resumes for a few beats then the same cycle repeats. I do not experience dizziness with this. I take Fosinopril ( 20 mg) and Amlopidine ( 5 mg). I have had this often on for a few years, then they seem to subside substantially once I was put on fosinpril. They used to increase substantially if I consume alcohol. In this case I wake up in the middle of the night with these symptoms and las for a few hours. I have stopped drinking completely for the last few years. But now I have them every day for hours. , Two weeks ago my doctor installed for me an on demand, two lead pacemaker for bradycardia. These uneven heart beats increase substantially even though interrogation of the pacemaker show an overall use of around 5 %. What should i [/INST] Hi, The abnormal heart rate of such kind you are mentioning could be an arrhythmia. The interrogation of pacemaker will detect what kind of arrhythmia you have. As you are already on a pacemaker, you should be started on an antiarrhythmic Chat Doctor.  Exact treatment can only be started after seeing the ECG at the time of these arrhythmias. Hope I have answered your query. Let me know if I can assist you further. Take care  </s>