Question

Match the Column-1 with Column-II:

Column - 1		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)	Repolarisatjon of atria

Select the correct option from the following:

• A. $a \rightarrow ii , b \rightarrow i , c \rightarrow v , d \rightarrow iii$
• B. $a \rightarrow ii , b \rightarrow iii , c \rightarrow v , d \rightarrow iv$
• C. $a \rightarrow iv , b \rightarrow i , c \rightarrow ii , d \rightarrow iii$
• D. $a \rightarrow iv , b \rightarrow i , c \rightarrow ii , d \rightarrow v$

Answer 1

Answer: (C)

In ECG P-wave represents depolarisation of atria. QRS complex represents depolarisation of ventricles. T-wave represents repolarisation of ventricle i.e. return from excited to normal state. Reduction in the size of T-wave i.e. if the T-wave represents insufficient supply of oxygen i.e. coronary ischaemia.