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MINNESOTA CODE 9

ST Segment Elevation

Anterolateral Site (Leads I, aVL, V6)

9-2

ST segment elevation >= 1.0 mm in any of leads I, aVL, V6.

Posterior (inferior) Site (Leads 11, III, aVF)

9-2

ST segment elevation >= 1.0 mm in any of leads II, m, aVF.

Anterior Site (Leads V1, V2, V3, V4, V5)

9-2

ST segment elevation >= 1.0 mm in lead V5 or ST segment elevation >= 2.0 mm in any of leads V1, V2, V3, V4.

Miscellaneous Items

9-1

Low QRS amplitude. QRS peak-to-peak amplitude < 5 mm in all beats in each of leads I, II, III, or < 10 mm in all beats in each of leads V1, V2, V3, V4, V5, V6. (Check calibration before coding.)

9-3

P-wave amplitude >= 2.5 mm in any of leads II, III, aVF, in a majority of beats.

9-4-1

QRS transition zone at V3 or to the right of V3 on the chest. (Do not code in the presence of 6-4-1, 7-1-1, 7-2-1, or 7-4.)

9-4-2

QRS transition zone at V4 or to the left of V4 on the chest. (Do not code in the presence of 6-4-1, 7-1-1, 7-2-1, or 7-4.)

9-5

T-wave amplitude > 12 mm in any of leads I, II, III, aVL, aVF, V1, V2, V3, V4, V5, V6. (Do not code in the presence of 6-4-1, 7-1-1, 7-2-1, or 7-4.)

9-8-1

Technical problems which interfere with coding.

9-8-2

Technical problems which do not interfere with coding.

REFERENCE:

Prineas, R. J., Crow, R. S., & Blackburn, H. W. (1982). The Minnesota code manual of electrocardiographic findings: standards and procedures for measurement and classification. Boston, Mass: J. Wright.