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WB JEE Medical WB JEE Medical Solved Paper-2006

  • question_answer
    P wave of ECG occurs before the:

    A)  onset of ventricular ejection

    B)  end of atrial contraction

    C)  begining of atrial contraction

    D)  none of the above

    Correct Answer: C

    Solution :

                    P wave of ECG occurs before the beginning of atrial contraction (depolarization of atria). It is the first upward deflection caused by the passage of the action current over the auricles. Its average duration is about 0.1 sec.


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