ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the waves are not represented. Which wave is that? Explain.

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Solution

The wave of atrial repolarization is invisible due to low amplitude. Atrial repolarisation coincides with ventricular depolarization, so it is merged with the QRS complex and thus, is not recorded as a separate wave. So, the wave of atrial repolarization is not represented.

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Similar questions

Q. ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.

Q. ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the following is not represented.

ECG depicts the depolarisation and repolarisation process during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.
(a) Depolarisation of atria
(b) Repolarisation of atria
(c) Depolarisation of ventricles
(d) Repolarisation of ventricles

Q. In normal ECG, the component that signifies duration of one cardiac cycle is ______.

Q. Match the columns and choose the correct option.

	I		II
(i)	Stroke volume	(a)	70-75 action potential per minute
(ii)	Cardiac output	(b)	Ventricular repolarisation
(iii)	SAN	(c)	70 ml of blood per cardiac cycle
(iv)	P-wave	(d)	5000 ml of blood per cardiac cycle
(v)	T-wave	(e)	Atrial depolarisation