Table 1 Minnesota classification of ECGs
ECG abnormalities | Minnesota Code | Definition |
|---|---|---|
Q or QS pattern | 1.1 | Q duration ≥ 0.04s in I, II, V2–V6. |
Q duration ≥ 0.05s in both aVF and III. | ||
QS pattern through V1–V4, V5 and V6. | ||
QS pattern when R wave is present in adjacent precordial lead to the right V2–V6. | ||
ST segment depression | 4.1–4.2 | 4.1: ST-depression ≥ 1 mm in I, II, aVL, aVF, V1–V6. |
4.2: ST depression 0.5–0.9 mm in I, II, aVL, aVF, V1–V6. | ||
T wave items | 5.1–5.4 | 5.1: T amplitude ≥ 5 mm in I, II V2–V6 when R amplitude ≥ 5 mm in aVL when QRS mainly upright in aVF. |
5.2: T amplitude = -1 to -5 in I, II, V2–V6 when R amplitude ≥ 5 mm in aVL when QRS mainly upright in aVF. | ||
5.3: T wave flat or small diphasic in I, II, V2–V6 when R amplitude ≥ in aVL when QRS mainly upright in aVF. | ||
5.4: T amplitude positive and T/R amplitude radio <1/20 in any of leads I, aVL, V6: R wave amplitude must be ≥ 10.0 mm. |