<p> The Zio® brand is a line of products offered by kRhythm.  It includes the Zio®  Continuous Card, a prescription-only, single-use, continuously recording ECG monitor that constantly records the heart’s electrical activity.  Also the Zio® Event Card, a prescription-only, single-use, looping ECG monitor that records the heart’s rhythm when the patient pushes a button upon feeling a symptom.  </p>