Home Biology Body Fluids and Circulation Image Based Problems The diagram given here is the standard ECG o…
Biology Body Fluids and Circulation Image Based Problems Single Correct MCQ
Published on: August 14, 2026

The diagram given here is the standard ECG of a normal person. The P-wave represents the

A
contraction of both atria
B
initiation of the ventricular contraction
C
beginning of the systole
D
end of systole

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ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle. Each peak in the ECG is identified with a letter from P to T that corresponds to a specific electrical activity of the heart. The P -wave represents the electrical excitation (or depolarization) of the atria, which leads to the contraction of both the atria

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