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Solution


Q.

Match the column - I with column - II.                        [2019]

  Column-I   Column-II
(A) P-wave (i) Depolarisation of ventricles
(B) QRS complex (ii) Repolarisation of ventricles
(C) T-wave (iii) Coronary ischaemia
(D) Reduction in the size of T-wave (iv) Depolarisation of atria
    (v) Repolarisation of atria

 

Select the correct option.
1 A-(ii), B-(iii), C-(v), D-(iv)  
2 A-(iv), B-(i), C-(ii), D-(iii)  
3 A-(iv), B-(i), C-(ii), D-(v)  
4 A-(ii), B-(i), C-(v), D-(iii)  

Ans.

(2)

A normal electrocardiogram or ECG comprises of a P wave, a QRS wave complex and a T wave in which P wave represents depolarisation of the atria, QRS wave complex represents depolarisation of the ventricles and T wave represents ventricular repolarisation. Myocardial ischaemia can affect morphology of T-wave in a variety of ways, i.e., T-wave may become tall, flattened, inverted or biphasic. Flattened T-waves is common in patient with myocardial ischaemia.