‘P’ wave of ECG occurs before the
Onset of ventricular ejection
End of atrial contraction
Beginning of atrial contraction
None of the above
‘P’ wave of ECG corresponds to the atrial systole.
Which of the following correctly explains a phase/event in the cardiac cycle in a standard electrocardiogram? (a) QRS complex indicates atrial contraction. (b) QRS complex indicates ventricular contraction (c) Time between S and T represents atrial systole. (d) P-Wave indicates the beginning of ventricular contraction.
Match column I with column II regarding the standard ECG of a normal person. Column−I Column−II(a)P−wave(i)Atrial depolarization(b)QRS wave(ii)Ventricular depolarization(c)T wave(iii)Ventricular repolarisation