Question

Explain what each component of the ECG cycle represents.
P wave:
QRS complex:
T wave:
P-R segment:
S-T segment:
P-R interval:
Q-T interval:

Answer 1

P Wave: Represents Atrial Depolarisation.

QRS Complex: Represents ventricular Depolarisation i.e; "Q" represents Ventricular depolarisation, "R" represents Actual ventricular depolarisation, and "S" represents Repolarisation of pappillary and purkinje.

T Wave: Represents Actual ventricular repolarisation.

P-R segment: Represents the time delay between atrial and ventricular activation. it is also known as the isoelectric line of the ECG curve.

S-T segment: Represents the early ventricular repolarisation.

P-R Interval: Represents the time taken by an impulse to start from the S.A node and cross the A.V node.

Q-T Interval: Represents the time taken by the ventricles for the depolarisation and repolarisation.