Q. In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?
A) S – start of systole
B) T – end of diastole
C) P – depolarisation of the atria
D) R – repolarisation of ventricles
Explanation
[Solution from source] In an ECG the P-wave represents electrical excitation (depolarisation) of the atria, leading to atrial contraction. The QRS complex is ventricular depolarisation and the T-wave is ventricular repolarisation, so R is not repolarisation. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.