MI Localization and description of the important arteries for heart perfusion
MYOCARDIAL INFARCTION LOCALIZATION:
|
Infarction Area |
ECG Leads |
Coronary Artery |
Branch |
|
Extensive anterior |
A, AVL, V1-V6 |
Left, LM |
LAD, LCX |
|
Anteroseptal |
V1-V3 |
Left |
LAD |
|
Anterolateral |
I, AVL, V4-V6 |
Left |
LCX |
|
Inferior |
II, III, AVF |
Right 80%, Left 20% |
PDA |
|
True Posterior |
V1-V2 (reciprocal) |
Left/right |
PL |
Note:
Coronary arteries – oxygenates and nourishes the heart; arises at the beginning of the aorta behind the aortic valve
1. Left Coronary Artery - supplies blood to the left myocardium
a. Left anterior descending artery – supplies blood to Anterior wall of left ventricle, AV septum, APEX of left ventricle
b. Circumflex artery – supplies blood to the left atrium, lateral and posterior part of the left side of heart
2. Right Coronary Artery - supplies blood to the right myocardium (SA/AV node, Posterior septal node)