Ischemia & infarction

STEMI (inferior)

ECG criteria

ST elevation in II, III, aVF with reciprocal ST depression in I/aVL.

Related: ischemia & infarction

STEMI (anterior)
ST elevation in V1-V4 with reciprocal inferior changes.
STEMI (lateral)
ST elevation in I, aVL, V5-V6.
Posterior STEMI
Tall R in V1-V2 with horizontal ST depression and upright T waves.
NSTEMI / non-ST elevation ACS
ST depression and/or T-wave inversion without persistent ST elevation.
Wellens syndrome
Biphasic or deeply inverted T waves in V2-V3, normal QRS, no Q waves; critical LAD stenosis.