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SA node is called the pacemaker of the heart

Tricuspid valve is located between right atrium and right ventricle

By counting the number fo QRS complexes that occur in a given time period, one can determine the heart beat rate of an individual

The P-wave represents the depolarization of the atria while QRS complex represents the repolarisation of the ventricles

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QRS complex represents the depolarization of the ventricles

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