We recorded an EKG Rhythm Strip to rule out atrial fibrillation which is an abnormal electrical conduction in the heart. Atrial fibrillation leads to an uncontrolled quivering and ineffective fast beating pattern which can lead to blood becoming stagnant and ultimately can form blood clots in the heart. The danger of these clots is that they can be pumped from your heart to your head which can cause a stroke. It is estimated that 15% of strokes are from untreated atrial fibrillation.