Abstract: The apparatus for calculating blood pressure using a digital ECG voltage coordinate value comprising an X coordinate of a time axis and a Y coordinate of a heart voltage signal intensity axis, the apparatus comprising an acquiring unit for acquiring a target digital ECG voltage coordinate value of the measurement subject, and an arithmetic unit for calculating a systolic blood pressure and a diastolic blood pressure by comparing previously stored reference digital ECG voltage coordinate values and acquired digital ECG voltage coordinate values, respectively. the acquired target digital ECG voltage coordinate value includes: a specific coordinate value (QPT value) representing an inflection point of a Q waveform; a specific coordinate value (RPT value) representing an inflection point of an R waveform; a specific coordinate value (TPT value) representing an inflection point of a T waveform; and a specific coordinate value (SPT value) representing an inflection point of an S waveform.

Abstract: Provided is a wearable heart abnormal symptom sensing smart watch including: a smart band to be worn on a wrist of a user; an electrocardiogram (ECG) measurement sensor installed in the smart band and come into contact with a wrist skin of the user, the ECG measurement sensor to repetitively measure an ECG signal from the user; and a smart device installed in the smart band and in electrical contact with the ECG measurement sensor through the smart band.

Abstract: The apparatus for calculating blood pressure using a digital ECG voltage coordinate value comprising an X coordinate of a time axis and a Y coordinate of a heart voltage signal intensity axis, the apparatus comprising an acquiring unit for acquiring a target digital ECG voltage coordinate value of the measurement subject, and an arithmetic unit for calculating a systolic blood pressure and a diastolic blood pressure by comparing previously stored reference digital ECG voltage coordinate values and acquired digital ECG voltage coordinate values, respectively.

Abstract: Provided is an electrocardiogram (ECG) biometric authentication system that performs biometric authentication using biometric information having unique values for each client includes one or more client terminals and a key distribution center (KDC) that uses ECG information of the one or more client terminals to issue a digital certificate. According to the configuration of the electrocardiogram biometric authentication system, security is enhanced.

Abstract: A sudden heart attack prevention method using an electrocardiogram (ECG) is provided. The method includes obtaining a digital ECG electrical signal, generating digital ECG (X, Y) pattern information by processing the digital ECG electrical signal, sensing whether the digital ECG (X, Y) pattern information deviates from a normal condition, when the digital ECG (X, Y) pattern information deviates from the normal condition, comparing the digital ECG (X, Y) pattern information and an abnormality symptom type, and when it is determined that the digital ECG (X, Y) pattern information is a heart attack presymptom, informing an acquaintance and a hospital of the digital ECG (X, Y) pattern information. According to a configuration of the present invention, when a sudden heart attack occurs, first-aid treatment can be performed without missing the so-called “golden time.

Abstract: Provided is an electrocardiogram (ECG) biometric authentication system that performs biometric authentication using biometric information having unique values for each client includes one or more client terminals and a key distribution center (KDC) that uses ECG information of the one or more client terminals to issue a digital certificate. According to the configuration of the electrocardiogram biometric authentication system, security is enhanced.