Match the Column - I with Column - II: Column - I Column II a P - wave i Depolarisation of ventricles b QRS complex i i Repolarisation of ventricles c T - wave i i i Coronary ischemia d Reduction in the size of T - wave i v Depolarisation of atria v Repolarisation of atria Select the correct option

Question

Match the Column - I with Column - II: Column - I Column II a P - wave i Depolarisation of ventricles b QRS complex i i Repolarisation of ventricles c T - wave i i i Coronary ischemia d Reduction in the size of T - wave i v Depolarisation of atria v Repolarisation of atria Select the correct option, a - i v ; b - i ; c - i i ; d - i i i, a - i v ; b - i ; c - i i ; d - v, a - i i ; b - i ; c - v ; d - i i i, a - i i ; b - i i i ; c - v ; d - i v

MARKS App · Accepted Answer

The first deflection is the P wave linked with right and left atrial depolarization. A wave of which is invisible because of low amplitude. The normal P wave is no higher than 2.5 mm (two-and-a half1-mm-divisions) tall and less than 120 ms (three 1-mm-divisions) in width in any lead. The second wave is the QRS complex. The complex has a series of 3 deflections that reflects current associated with right and left ventricular depolarization. By convention, the first deflection in the complex, if negative, is called a Q wave. The first positive deflection in the complex is called an R wave. A negative deflection after an R wave is called an S wave. The most labile wave in the ECG is the T wave, which changes including low-amplitude T waves and abnormally inverted T waves, which may be the result of many cardiac and non-cardiac conditions.

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	Column - I		Column II
$(a)$	P - wave	$(i)$	Depolarisation of ventricles
$(b)$	QRS complex	$(i i)$	Repolarisation of ventricles
$(c)$	T - wave	$(i i i)$	Coronary ischemia
$(d)$	Reduction in the size of T - wave	$(i v)$	Depolarisation of atria
		$(v)$	Repolarisation of atria