Question

Match the Column - I with Column - II

Column - I Column - II
(a) P - wave (i) Depolarisation of ventricles
(b) QRS complex (ii) Repolarisation of ventricles
(c) T - wave (iii) Coronary ischemia
(d) Reduction in the size of T - wave (iv) Depolarisation of atria
(v) Repolarisation of atria
Select the correct option.
(a) (b) (c) (d)
(1) (iii) (i) (ii) (iv)
(2) (ii) (iv) (i) (iii)
(3) (iii) (iv) (i) (ii)
(4) (iii) (ii) (i) (iv)

Answer 1

(a) P - wave -(iv)Depolarisation of atria

(b) QRS complex- (i)Depolarisation of ventricles

(c) T - wave  - (ii) Repolarisation of ventricles

(d) Reduction in the size of T - wave - Coronary ischemia

Step by step explanation:

• The P wave is the depolarization of the left and right atrium, which leads to the atrial contraction as well.
• The QRS complex reflects the electrical impulse that passes through the ventricles and indicates ventricular depolarization.
• The T wave represents the ventricles being repolarised. The interval from the beginning of the QRS complex up to the T-wave apex is called the absolute refractory period.
• Reduction in T-wave size i.e. if the T-wave represents insufficient oxygen supply i.e., coronary ischemia.