ECG voltage

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This topic contains 1 reply, has 2 voices, and was last updated by  Nuno Ferreira 3 years, 11 months ago.

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    João Fernandes


    I am developing an Android application for heart activity monitorization and I would like to plot the ECG signal in real time. Is there any method in VitalJacket library that directly outputs heart’s electrical signal voltage? If not, how can I obtain this value?



    Nuno Ferreira


    For obtain the ECG values, please use this formula:

    // features device
    voltage = 3.3 mV
    GAINFACTOR = 500
    levels = 240

    // gain of sample (in mv)
    GAIN = ((voltage / GAINFACTOR) / (float)levels) * 1000 = 0.028 mV

    For example, if ecg sample is 200, the output value in mV is 200 * 0.028 = 5.6mV

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