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Electrocardiogram change type code N

Identifying and definitional attributes

Metadata item type:Help on this termValue Domain
METeOR identifier:Help on this term356861
Registration status:Help on this termHealth, Standard 01/10/2008
Definition:Help on this termA code set describing the type of change to the heart rhythm seen on the electrocardiogram (ECG).

Representational attributes

Representation class:Help on this termCode
Data type:Help on this termNumber
Format:Help on this termNN
Maximum character length:Help on this term2
Permissible values:Help on this term
ValueMeaning
10ST-segment-elevation >= 1 mm (0.1 mV) in >= 2 contiguous limb leads
11ST-segment-elevation >= 2 mm (0.2 mV) in >= 2 contiguous chest leads
12ST-segment depression >= 0.5 mm (0.05 mV) in >= 2 contiguous leads (includes reciprocal changes)
20T-wave inversion >= 2 mm (0.1 mV)
30Significant Q waves
40Left bundle-branch block (BBB)
41Right bundle-branch block (BBB)
42Indeterminate bundle-branch block (BBB)
90Non specific
Supplementary values:Help on this term
99Not stated/inadequately described

Collection and usage attributes

Guide for use:Help on this term

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.

Relational attributes

Related metadata references:Help on this term

Supersedes Electrocardiogram change type code N Health, Superseded 01/10/2008

Data elements implementing this value domain:Help on this term

Electrocardiogram—change type, code N Health, Standard 01/10/2008

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