02.09 12 Lead EKG- Leads 1, 2, 3, aVL, and aVF for CCRN Review
Included In This Lesson
Study Tools For 02.09 12 Lead EKG- Leads 1, 2, 3, aVL, and aVF for CCRN Review
Outline
Nursing Points
General
- 12 Lead EKG: Leads 1, 2, 3, aVL, & aVF
- “+” or “-” regarding electrical charge of heart
- Positive lead = left arm, left leg
- Negative lead = arm
- Lead monitoring
- Lead 1, aVL -> view inferior wall of heart
- To read a hemi-block
- Electrical current goes through L bundle first -> through ventricular anterior septal wall -> then through right bundle
- ‘Deviations’ of the direction of electrical current
- Right axis deviation = S wave dips down far in Lead 1 and aVL
- Left axis deviation = S wave dips down far in Lead 2, 3, and aVF
- “+” or “-” regarding electrical charge of heart