SITE
• Largely localized to left ventricle

TYPES (ACC. TO DEPTH)
• Transmural (“Prolonged-” Q wave MI)
• Subendocardial (Non-Q wave MI or Non-ST Elevation MI; NSTEMI)

TYPES (ACC. TO SITE)
Type: Corresponding EKG changes in
• Inferior: Leads II, III, aVF
• Anterior: Leads V1-V4
• Lateral: Leads I, aVL, V4-V6
• Posterior: Leads V1, V2 (Tall T, ST depression)

DEFINITE DIAGNOSIS
By EKG
• ST segment changes, or
• New LBBB (left bundle branch block)

EKG PATTERNS
• Transmural MI (Q wave MI):
Hyperacute T & ST elevation » T-wave inversion » prolonged Q
• Non-Q-Wave MI (Also termed non-ST elevation MI, or NSTEMI):
ST depression » persistent ST-T-wave changes without Q-wave development