What is the Paper Speed of the Kardia EKGs recorded with Kardia devices? Updated December 20, 2017 01:37 The paper speed is 25 mm/s. Related articles What is the Gain of the EKG display in Kardia apps? What is a Physician Code? What is the Maximum Heart Rate of a Kardia EKG? What are the AF, Normal and Interference Detectors? What is the Mains Filter?