Speaking of ECG, many people would first think of the huge EKG machine in the hospital, and in the context of Internet mobile age, some intelligent mobile medical equipment also started the process of household. Household good friend electrocardiograph is for heart disease population research and development of intelligent devices, hoping to meet the needs of users in the ECG. However, so many users are worried about is: Home EKG machine, like good friends, like a smart bracelet and watch is just biased fashion goods, but does not bring real data to support health care. In particular, ECG, its professional nature and complexity is known, in the absence of medical supervision cases detected of electrocardiogram data reliable?