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How To Read An ECG

Discussion in 'Cardiology' started by Egyptian Doctor, Nov 4, 2012.

  1. Egyptian Doctor

    Egyptian Doctor Moderator Verified Doctor

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    The ECG paper is mostly standardised

    - Each large square on the paper represents 0.2 seconds
    - Each small square represents 0.04 seconds
    - 5 large squares therefore = 1 second
    - 300 large squares = 1 minute
    - To calculate heart rate – count large squares within an R-R interval & divide 300 by this number

    P-waves

    P-waves represent atrial depolarisation
    There should be a P-wave preceding each QRS complex

    QRS complex

    The QRS-complex represents depolarisation of the ventricles
    It is seen as 3 closely related waves on the ECG (Q,R & S wave);
    The first downward deflection is the Q-wave
    Any upward deflection is an R-wave
    Downward deflections after an R-wave is called an S-wave
    It should be between 0.06-0.10 seconds

    T-wave

    The T-wave represents ventricular re-polarisation
    It is seen as a small wave after the QRS complex

    To Understand More , Check This Photo And Watch This Short Youtube Video :

    [​IMG]



    [​IMG]
     

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  2. Nana Shonk

    Nana Shonk Bronze Member

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    Heart alphabet! <3
     

  3. Dr Zurich Mahesh

    Dr Zurich Mahesh Active member

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    informative for students
     

  4. Dr Hari

    Dr Hari Active member

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    downloadable downloadable
     

    Ali Almfraji likes this.
  5. Ali Almfraji

    Ali Almfraji Active member

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    Informative topic...... thanx admin
     

  6. ahmad fahmy

    ahmad fahmy Young Member

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  7. Kiprotich Victor

    Kiprotich Victor Young Member

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    This is awesome. In a simple way...
     

  8. M- JIMMY

    M- JIMMY Young Member

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    Nice & simple presentation
     

  9. Ilkhom Mirvaliev

    Ilkhom Mirvaliev Young Member

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    Really very clear like alfabet
     

  10. Mohammedsordahi

    Mohammedsordahi Bronze Member

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    sameer2a Young Member

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