Q. In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of human heart?
A) R-repolarization of ventricles
B) S-start of systole
C) T-end of diastole
D) P-depolarization of the artia
Explanation
In ECG, P-wave indicates impulse of contraction generated by SA-node and it spreads in atria causing atrial depolarisation. T-wave is the most constant and conspicuous wave having the tallest amplitude. It is the first positive deflection during ventricular depolarization. S-wave is the next downward deflection constant but often inconspicuous. T-wave is repolarization wave of ventricular relaxtion.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.