ECG devices
The details of the wireless, patch-type ECG monitoring device (Duranta; medical device certificate number in Japan: 226AIBZX00055000) were previously reported.3, 4 The Duranta device is small (78.4 mm wide × 35.1 mm deep × 14.7 mm thick), light (35 g), and easy to attach to the chest via two patch electrodes (Figures 1A, 1B ). The battery lasts up to seven consecutive days without charging. The patients detach the device to bathe and reattach it afterwards. The ECG data is automatically transmitted to the cloud server via a dedicated iPhone. The patients can see their own ECG on the iPhone. Medical staff can access the cloud server using a personal ID/password and can see the real-time ECG of the patients on an iPad and download the ECG data to a computer in the hospital (Figure 1C ). The patients’ personal information was not input in the ECG devices (the Duranta and the iPhone); therefore, there was no risk of personal date leakage during delivery of the ECG devices.