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In a standard ECG, the P-wave represents:

  1. A
    Contraction of both atria
  2. B
    Initiation of ventricular contraction
  3. C
    Beginning of systole
  4. D
    End of systole

Solution & Step-by-step Explanation

In an ECG, the P-wave represents the electrical excitation (or depolarization) of the atria, which leads to the contraction of both atria.

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In a standard ECG, the P-wave represents:
A
Contraction of both atria
B
Initiation of ventricular contraction
C
Beginning of systole
D
End of systole

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