In a standard ECG which one of following alphabets is the correct representation of the respective activity of the human heart?

  • Option 1)

    S - start of systole

  • Option 2)

    T - end of diastole

  • Option 3)

    P- depolarisation of the atria

  • Option 4)

    R - repolarisation of ventricles

 

Answers (1)

As we learnt in

Steps to obtain a standard ECG -

Each peak in the ECG is identified with a letter from P to T that corresponds to a specific electrical activity of the heart.

- wherein

Steps to obtain a standard ECG

 

 

The P-wave -

The P-wave represents the electrical excitation (or depolarisation) of the atria,

- wherein

which leads to the contraction of both the atria.

 

The T-wave -

The T-wave represents the return of the ventricles from excited to normal state (repolarisation).

- wherein

The end of the T-wave marks the end of systole.

 

 

 


Option 1)

S - start of systole

Incorrect

Option 2)

T - end of diastole

Incorrect

Option 3)

P- depolarisation of the atria

Correct

Option 4)

R - repolarisation of ventricles

Incorrect

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