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Question

Which of the component of an ECG is correctly matched below ?


A

Peak P - initiation of left atrial contraction only.

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B

Peak T - initiation of total cardiac contraction

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C

Peak P and R together - systolic and diastolic blood pressures

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D

QRS - one complete pulse

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Solution

The correct option is D

QRS - one complete pulse


By counting the number of QRS complexes that occur in a given period, one can determine the heart rate (pulse) of an individual. The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction.


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