ECG changes in potassium disorders 🟢 HYPERKALEMIA (Elevated Serum K⁺) EKG changes evolve predictably with rising potassium levels: → Early (K⁺ ~6-7 mmol/L): Prolonged PR interval, Flattened P waves. → Moderate (K⁺ ~7-8 mmol/L): Tall, peaked ("tented") T waves. → Severe (K⁺ ~8-9 mmol/L): Prolonged QRS duration, ST-segment depressions. → Critical (K⁺ >9 mmol/L): Sine wave pattern, culminating in ventricular fibrillation or asystole. ⚫️ HYPOKALEMIA (Low Serum K⁺) Presents with a distinct pattern o
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