Kardia has algorithms cleared by the FDA to tell you if your EKG is "Normal" or in "Possible AFib." As a regulated medical device, Kardia is not cleared to communicate any other rhythms, so we label all other arrhythmia's like PVCs, PACs, SVTs as "Unclassified". All rhythms below 50 bpm and above 100 bpm even if they are normal sinus rhythm are also marked unclassified. If you get an unclassified reading and are concerned, you can send your EKG to your physician to get their interpretation, or submit it for a Clinician Review directly from the app.