 Now, a repolarization is when the influx of sodium into the cell stops and the potassium flows out. Remember, whenever something goes in, something else has to come out in order to maintain balance between the positively and negatively charged ions. And the membrane potential returns to a negative resting level, which is the polarization also known as that resting membrane potential. So there is no activity, then every then the sodium flows in, eventually potassium flows out and then we're back to square one until the next bead hits. Where repolarization on an EKG strip is represented by the T wave and that is ventricular repolarization and we'll go into that a little bit more when we look at the actual waveforms.