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


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