Question

Which of the following waves represent the excitation of the atria?

(a) P-wave

(b) QRS complex

(c) T-wave

(d) ST-segment

I got this question by my school principal while I was bunking the class.

The origin of the question is ECG in division Body Fluids and Circulation of Biology – Class 11

Answer 1

Right answer is (a) P-wave

For explanation I would say: The P-wave represents the electrical excitation of depolarisation of the atria which leads to the contraction of both the atria. The T-wave represents the repolarisation of the ventricles.