The normal ECG in childhood and adolescence
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  • Published on:
    Response to Dr Okreglicki

    Dear Editor,

    Dr Okreglicki correctly identifies an error in the placement of the decimal point in relation to the maximum P wave amplitude in lead 2. As he says the upper limit of normal for P wave amplitude in lead 2 is 0.25mV. Amplitudes in all tables are in millivolts. Apologies for the omission of this information from table 1.

    Conflict of Interest:
    None declared.
  • Published on:
    ECG wave amplitudes and measurements

    Dear Editor,

    Measurements of amplitude and duration of waves or complexes on the electrocardiogram are frequently bedevilled by issues of scale, calibration and paper-speed of recordings.1 The potential for non- standard recordings strengthens the case for using units of measurement unaltered by the scale i.e. millivolts (mV) and seconds instead of millimetres (mm) of amplitude or duration respectively. We have...

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    Conflict of Interest:
    None declared.