What does each part of PQRST represent?
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ST segment
Represents end of ventricular depolarisation and the begining of ventricular repolarisation
P wave
Respresents atrial depolarisation
Q wave
Septal depolarisation
PR interval
The time from onset of atrial depolarisation to onset of ventricular depolarisation
QRS complex
Ventricular depolarisation or the conduction of nerve impulses through the bundle of His, down through the heart and around the right and left bundle branches
T wave
Ventricular repolarisation
