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Question

Match the Column - I with Column - II.

Column I Column II
A P-wave 1 Depolarisation of ventricles
B QRS complex 2 Repolarisation of ventricles
C T-wave 3 Coronary ischemia
D Inversion of T-wave 4 Depolarisation of atria
5 Repolarisation of atria

A
A-2, B-3, C-5, D-4
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B
A-4, B-1, C-2, D-3
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C
A-4, B-1, C-2, D-5
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D
A-2, B-1, C-5, D-3
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Solution

The correct option is B A-4, B-1, C-2, D-3
Electrocardiograph is a machine that produces an electrocardiogram (ECG).

ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle. The ECG produces peaks and each peak is marked with a letter from P to T that corresponds to a specific electrical activity of the heart.

The P-wave represents the depolarisation of the atria, which leads to atrial contraction.

The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction.

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

Inversion of the T-wave can be indicative of coronary ischemia.

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