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NOVACODE 5

ECG Categories Associated with Prevalent Myocardial Infarction/Ischemia (MI Likelihood)

5.0

No significant Q waves and no significant ST-T abnormalities

  • Q score < 15 and STD and TN scores < 10

Q Wave MI

5.1

Q wave MI: Major Q waves with or without ST-T abnormalities

  • Q score >= 35 in any lead

5.2

Q wave MI: Moderate Q waves with ST-T abnormalities

  • Q score >= 25 in any lead and STD or TN score >= 20 in any lead group

5.3

Possible Q wave MI: Moderate Q waves without ST-T abnormalities

  • Q score >= 25 in any lead and STD and TN score < 20 in all lead groups

5.4

Possible Q wave MI: Minor Q waves with ST-T abnormalities

  • Q score >= 15 in any lead and STD or TN score >= 20 in any lead group

Isolated Ischemic Abnormalities

5.5

ST abnormalities without Q waves

  • TD score >= 20 in any lead and Q score < 15 in all leads and Code 6.0 (No LVH)

5.6

T wave abnormalities without Q waves

  • TN score >= 20 in any lead and Q score < 15 in all leads and Code 6.0 (No LVH)

Isolated minor Q and ST-T Abnormalities

5.7

Minor Q waves without ST-T abnormalities

  • Q score >= 15 in any lead and STD and TN score < 20 in any lead groups

5.8

Minor ST-T abnormalities

  • STD or TN score >= 10 in any lead group

REFERENCE:

Rautaharju PM, Park LP, Chaitman BR, Rautaharju F, & Zhang ZM. (1998). The Novacode criteria for classification of ECG abnormalities and their clinically significant progression and regression. Journal of Electrocardiology. 31(3), 157-87.