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Ion Abnormalities on ECG. Hypokalaemia. Potassium important in REPOLARISATION Flattened or inverted T waves U wave presence ST depression ↑ Amplitude and width of P Prolonged PR interval Tachyarrhythmia Prolonged QT interval. Hypokalaemia. Prolonged Big P. Added U. Flattened T.
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Hypokalaemia • Potassium important in REPOLARISATION • Flattened or inverted T waves • U wave presence • ST depression • ↑ Amplitude and width of P • Prolonged PR interval • Tachyarrhythmia • Prolonged QT interval
Hypokalaemia Prolonged Big P Added U Flattened T
Hyperkalaemia • Increased T wave • Prolonged QRS • Prolonged PR interval • Flattened or absent P • Sine wave appearance
Hyperkalaemia Small P Big T
Calcium Insufficiency • Calcium affects PLATEAU phase • Therefore calcium levels affect QT interval • HYPOCALCAEMIA: Prolonged QT • HYPERCALCAEMIA: Shortened QT
HYPERCALCAEMIA SHORT QT HYPOCALCAEMIA LONG QT