The different infarct patterns are named according to the leads with maximal ST elevation:

The different infarct patterns are named according to the leads with maximal ST elevation:
*Septal = V1-2
*Anterior = V2-5
*Anteroseptal = V1-4
*Anterolateral = V3-6, I + aVL
*Extensive anterior / anterolateral = V1-6, I + aVL
#Clinical_prevalnce_of_anterior_myoc_inf:
#Anterior STEMI results from occlusion of the *left anterior descending artery (LAD).
#Anterior myocardial infarction carries the worst prognosis of all infarct locations, mostly due to larger infarct size.
In addition to anterior STEMI, other high-risk presentations of anterior ischaemia include
** left main coronary artery (LMCA) occlusion,
***Wellens’ syndrome and
****De Winter’s T waves.
#Toombstoning_STEMI
extensive ant.m.i.
Massive st elevation with “tombstone” morphology is present throughout the precordial (V1-6) and high lateral leads (I, aVL).
This pattern is seen in proximal LAD occlusion and indicates a large territory infarction with a poor LV ejection fraction and high likelihood of cardiogenic shock and death.