Electrocardiogram change type code N
Identifying and definitional attributes
|Metadata item type:||Value Domain|
|Registration status:||Health, Standard 01/10/2008|
|Definition:||A code set describing the type of change to the heart rhythm seen on the electrocardiogram (ECG).|
|Maximum character length:||2|
Collection and usage attributes
|Guide for use:|
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).
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
|Related metadata references:|
Supersedes Electrocardiogram change type code N Health, Superseded 01/10/2008
|Data elements implementing this value domain:|
Electrocardiogram—change type, code N Health, Standard 01/10/2008