For STEMI, initial ECG is usually diagnostic, showing ST-segment elevation ≥ 1 mm in 2 or more contiguous leads subtending the damaged area (see figures Acute lateral left ventricular infarction, Lateral left ventricular infarction, Lateral left ventricular infarction (several days later), Acute inferior (diaphragmatic) left ventricular infarction, Inferior (diaphragmatic) left ventricular infarction, and Inferior (diaphragmatic) left ventricular infarction (several days later)).