A Short Review of ECG Signals

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The structure of an ECG signal. Courtesy: Wikipedia.

General Features

P wave

  • P wave has a duration less than 120 msec with frequencies below 10-15 Hz.

QRS complex

  • QRS wave has a duration of about 70-110 msec with frequencies in 10-50 Hz.

T wave

  • It is similar in frequency content to P wave.

PQ segment

  • PQ segment lasts about 80 msec.