How to detect S wave peaks in ecg

1. How do you find R-peak on ECG?
2. What are the QR and S waves?
3. Which electrode is used to detect P wave?

How do you find R-peak on ECG?

The R-peak time in a specific ECG lead is the interval from the earliest onset of the QRS complex, preferably determined from multiple simultaneously recorded leads, to the peak (maximum) of the R wave or R' if present.

What are the QR and S waves?

So now it is possible to break down the QRS complex into 3 distinct waves: Q wave representing septal depolarisation. R wave representing ventricular depolarisation. S wave representing depolarisation of the Purkinje fibres.

Which electrode is used to detect P wave?

Phase φ(n) is mainly used for P wave detection.