@evelynd Premature atrial complex, or premature atrial contractions...both appear in the literature. Take your pick. It is a quick extra atrial beat followed by a pause, and then the next beat is usually/often a real thumper that makes you sit up and take notice. You feel it in the neck or just in the chest. They are more benign than AF, but they can be precursors to full-blown AF. For both arrhythmias, the cardiologist and EP look to the overall 'burden', or how many of them you have in a 24 hour period. If either one rises to the 8% level they begin to talk to you about an ablation or other remedy. However, I have seen literature recently that this high level of burden should be reduced to the 3% mark as at that level morbidity rises sharply for most patients. This is a topic you can explore on your own and confront your cardiologist about if it gets in your way of decent quality of life.