heart monitoring medical apparatus; heartbeat measuring apparatus; heart rate monitoring apparatus; electrocardiogram(ECG) measuring devices; wearable patches for measuring electrocardiogram (ECG); electrode patches for measuring electrocardiogram (ECG); wearable devices for monitoring electrocardiogram (ECG); wearable electrocardiogram(ECG) measuring devices; wearable electrode patches for measuring electrocardiogram (ECG); medical apparatus and instruments; wireless biometric signal measuring devices for medical use; biometric measuring devices for medical purpose; diagnostic apparatus for medical purposes; measuring instruments for medical purposes; medical apparatus for diagnosing suspected heart attacks; medical diagnostic apparatus and instruments using artificial intelligence; diagnostic apparatus and instruments for medical purposes; in vitro diagnostic devices for medical purposes; apparatus for analysing measured physical signals