Table 1 The 12-lead ECG electrical activity [27, 28]
Lead | Electrical activity | Anatomical relations view |
|---|---|---|
I | LA-RA | Lateral surface |
II | LL-RA | Inferior surface of heart. P-wave mostly clear, and commonly used to observe the rhythm strip. |
III | LL-LA | Inferior surface of heart |
aVR | RA-average of (LA + LL) | Right atrium and left ventricle cavity |
aVL | LA-average of (RA + LL) | Lateral surface |
aVF | LL-average of (LA + RA) | Inferior surface of heart |
V1 | V1 - average of (LA + RA + LL) | Anterior surface, right atrium and left ventricle cavity |
V2 | V2 - average of (LA + RA + LL) | Anterior surface |
V3 | V3 - average of (LA + RA + LL) | Anterior surface |
V4 | V4 - average of (LA + RA + LL) | Anterior surface |
V5 | V5 - average of (LA + RA + LL) | Lateral surface |
V6 | V6 - average of (LA + RA + LL) | Lateral surface |