In a standard ECG which one of the following alphabets is the correct represention of the respective…
In a standard ECG which one of the following alphabets is the correct represention of the respective activity of the human heart?
P-depolarisation of the atria
R-repolarisation of ventricles
S-start of systole
T-end of diastole
Solution
The P wave in an ECG represents the depolarization of the atria, which is the electrical activity that leads to the contraction of the atria.
Other options:
R wave: Represents depolarization of the ventricles, not repolarization.
S wave: Refers to part of ventricular depolarization, not the start of systole.
T wave: Represents repolarization of the ventricles, not the end of diastole.
Thus, P-depolarization of the atria is the correct representation.