02.09 12 Lead EKG- Leads 1, 2, 3, aVL, and aVF for CCRN Review

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Laura Gasparis Vonfrolio
PhD,RN,CCRN
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Included In This Lesson

Study Tools For 02.09 12 Lead EKG- Leads 1, 2, 3, aVL, and aVF for CCRN Review

10 Common EKG Heart Rhythms (Cheatsheet)
Heart Rhythm Identification (Cheatsheet)
EKG Chart (Cheatsheet)

Outline

Nursing Points

General

 

  1. 12 Lead EKG: Leads 1, 2, 3, aVL, & aVF
    1. “+” or “-” regarding electrical charge of heart
      1. Positive lead = left arm, left leg
      2. Negative lead = arm
    2. Lead monitoring
      1. Lead 1, aVL -> view inferior wall of heart
    3. To read a hemi-block
      1. Electrical current goes through L bundle first -> through ventricular anterior septal wall -> then through right bundle
      2. ‘Deviations’ of the direction of electrical current
        1. Right axis deviation = S wave dips down far in Lead 1 and aVL
        2. Left axis deviation = S wave dips down far in Lead 2, 3, and aVF

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