ST-segment changes CODE 10 ST-segment-elevation >= 1 mm (0.1 mV) in >= 2 contiguous limb leads ST-segment-elevation indicates greater than or equal to 1 mm (0.1 mV) elevation in 2 or more contiguous limb leads. CODE 11 ST-segment-elevation >= 2 mm (0.2 mV) in >= 2 contiguous chest leads ST-segment-elevation indicates greater than or equal to 2 mm (0.2 mV) elevation in 2 or more contiguous chest leads. CODE 12 ST-segment depression >= 0.5 mm (0.05 mV) in >= 2 contiguous leads (includes reciprocal changes) ST-segment depression of at least 0.5 mm (0.05 mV) in 2 or more contiguous leads (includes reciprocal changes). T-wave changes CODE 20 T-wave inversion >= 2 mm (0.2 mV) T-wave inversion of at least 2 mm (0.2 mV) including inverted T waves that are not indicative of acute MI. Q wave changes CODE 30 Significant Q waves Q waves refer to the presence of Q waves that are greater than or equal to 0.03 seconds in width and greater than or equal to 1 mm (0.1 mV) in depth in at least 2 contiguous leads. Bundle-branch block changes CODE 40 Left bundle branch block (BBB) Diffuse left bundle-branch block pattern. CODE 41 Right bundle-branch block (BBB) Diffuse right bundle-branch block pattern. CODE 42 Indeterminate bundle-branch block (BBB) Bundle-branch block pattern identified, but left or right location is unclear. CODE 90 Non-specific Changes not meeting the above criteria. CODE 99 Not stated/inadequately described Includes unknown. |