In a standard ECG, which one of the following alphabets is the correct representation of the respective…
In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?
R-repolarisation of ventricles
S-start of systole
T-end of diastole
P-depolarisation of the atria
Solution
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 depolarisation.
S-wave is the next downward deflection constant but often inconspicuous.
T-wave is repolarisation wave of ventricular relaxation.