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Comparison of ECG abnormalities with WHO class.
| ECG Abnormalities | WHO CLASS I (n = 23) | WHO CLASS II (n = 28) | WHO CLASS III (n = 71) | WHO CLASS IV (n = 78) | P value |
|---|---|---|---|---|---|
| Sinus tachycardia | 3 | 4 | 18 | 25 | 0.13 |
| Conduction abnormalities | 1 | 2 | 1 | 1 | 0.30 |
| Atrial ectopics | 1 | 1 | 1 | 2 | 0.84 |
| Ventricular ectopics | 1 | 1 | 2 | 1 | 0.81 |
| Poor progression of R wave | 1 | 1 | 1 | 3 | 0.80 |
| Low voltage | 3 | 3 | 6 | 14 | 0.37 |
| ST/T wave abnormality | 4 | 3 | 5 | 12 | 0.36 |
ECG, electrocardiogram; WHO, World Health Organization.
