|Quando||20 Giugno 2019 dalle 11:00 alle 12:00|
|Dove||Aula R4 - PRABB|
UCBM presents the Seminary of Doctor Soumyajyoti MajiSoumyajyoti Maji, Dept. Electronic & Electrical Engineering at Trinity College of Dublin.
Therefore, attention is given to investigating the close relationship between thelow-frequency response of the skin-electrode-amplifier network and the inputimpedance characteristics of electrocardiographs. The transient response of ECGamplifiers is investigated in the light of the IEC 60601 performance standard for ECGrecording equipment. Recent test result on several electrode models suggests that theundershoot limit of 100 μV and the recovery slope limit of 300 μV/s in response to a 3mV, 100 ms rectangular pulse are violated when the recommended 10 MΩ inputimpedance at the input of the recording amplifier is used.
Signal distortions appear in theform of an exaggeration of an S wave and depression in the ST segment, which couldbe misinterpreted clinically as signs of myocardial ischemia or the onset of myocardialinfarction when using a real recorded ECG signal with the recommended 10 MΩ inputimpedance at the amplifier input. Analysis and test result recommend that an amplifierinput impedance exceeding 3GΩ and a cut off frequency no higher than 0.05 Hz arenecessary to meet the IEC 60601 performance standard and avoid distortion in the ECGsignal.The need for the revision of theIEC 60601 standards pertainingto electrocardiographyGiovedì.