Portable electrocardiograph

摘要

A portable electrocardiograph includes a first electrode on an outer surface of a device main body and a second electrode drawn outside the device main body via a connection cable. The first electrode and the second electrode are brought into contact with a body surface. Then, a potential difference between the first and second electrodes is measured in order to measure an electrocardiographic waveform. In this manner, a noise caused by a myoelectric potential produced in muscles other than cardiac muscle is not superposed on the electrocardiographic waveform, and the electrocardiographic waveform can precisely be measured in a stable manner.