Can you have atrial fibrillation with a slow heart rate 60-100?

Yes: atrial fibrillation is when the atrium is beating not in coordination with the ventricle. It beats around 200 beats a minute. If the ventricular rate is controlled it beats 60-100 beats a minute. Since the are not synchronized there is a higher risk of blood clots in the heart which then can be thrown to the brain causing a stroke.n that is why we use blood thinners.