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Table 1 Clinical symptoms correlation with MetHb levels
| MetHb level (%) | Clinical Presentation |
|---|---|
| 0–3 | None |
| 3–10 | Cyanosis, asymptomatic |
| 10–20 | |
| 20–50 | CNS changes (headache,dizziness,confusion |
| 50–70 | MetabolicAcidosis, dysrhythmias. |
| ➢ 70 | fatal |
