12-Lead Electrocardiography              a comprehensive course                   Adam Thompson, EMT-P, A.S.
Quadrant Method• Much easier to do.• Faster and more practical for rapid  interpretation.• Does not give you a very close ...
Quadrant Method            -90      ERAD        LAD180                        0      RAD         Normal             90
Quadrant Method           aVF -     ERAD          LAD-I                       I+     RAD       Normal           aVF +
Quadrant Method            aVF -                        aVF -                                     Negative QRS     Negativ...
Axis Determination   Quadrant method   Thompson 66 ECG – 13 ECG – 14Is Lead I up or down?
Quadrant Method           aVF --I                 I+           aVF +
Axis Determination   Quadrant method   Thompson 66 ECG – 13 ECG – 14Is aVF up or down?
Quadrant Method           aVF --I                 I+           aVF +
Quadrant Method     aVF -                                -90                         ERAD         LAD-I            I+   18...
Quadrant Method
Hexaxial Method                     Frontal Plane Axis                        Pathologiesepshasic lead.diagram.ar lead.iti...
Quadrant Method           Lead I          aVFNormal   Positive (+)   Positive (+) RAD     Negative (-)   Positive (+) LAD ...
If all else fails…
That’s It
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4 quadrant method

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  • Left Anterior Fascicular Block CausesChronic hypertensionAortic stenosisAortic root dilationDilated cardiomyopathyImpairment of the cardiac electrical conduction systemAcute myocardial infarctionLung diseasesAgingDegenerative fibrotic disease
  • 4 quadrant method

    1. 1. 12-Lead Electrocardiography a comprehensive course Adam Thompson, EMT-P, A.S.
    2. 2. Quadrant Method• Much easier to do.• Faster and more practical for rapid interpretation.• Does not give you a very close estimate.
    3. 3. Quadrant Method -90 ERAD LAD180 0 RAD Normal 90
    4. 4. Quadrant Method aVF - ERAD LAD-I I+ RAD Normal aVF +
    5. 5. Quadrant Method aVF - aVF - Negative QRS Negative Positive Complex in aVF-I QRS in QRS in I+ -I I+ Lead I Lead I Positive QRS Complex in aVF aVF + aVF +
    6. 6. Axis Determination Quadrant method Thompson 66 ECG – 13 ECG – 14Is Lead I up or down?
    7. 7. Quadrant Method aVF --I I+ aVF +
    8. 8. Axis Determination Quadrant method Thompson 66 ECG – 13 ECG – 14Is aVF up or down?
    9. 9. Quadrant Method aVF --I I+ aVF +
    10. 10. Quadrant Method aVF - -90 ERAD LAD-I I+ 180 0 RAD Normal aVF + 90
    11. 11. Quadrant Method
    12. 12. Hexaxial Method Frontal Plane Axis Pathologiesepshasic lead.diagram.ar lead.itive or negative.
    13. 13. Quadrant Method Lead I aVFNormal Positive (+) Positive (+) RAD Negative (-) Positive (+) LAD Positive (+) Negative (-)ERAD Negative (-) Negative (-)
    14. 14. If all else fails…
    15. 15. That’s It
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