There are pauses in all arrhythmias. If there were no pauses, there could be no 'rhythm' per se. Otherwise, I'm not sure what your meaning is. The point I was making is that, keeping hydrodynamics in mind, that being the science and engineering dealing with fluid flow, an atrium in flutter beats so quickly that it can't fill itself properly, and then expel the volume into the ventricle below it. This is why so many people feel out of breath and faint. Even so, a person I knew was active and didn't know he was in flutter until an EKG revealed it. So, each patient experiences arrhythmias differently, and that is why the medical community tends to deal mostly with symptoms and trying to manage them for the patient's sake.