ECG Case 050

This is a classic sine wave ECG of critical hyperkalaemia

• Bradycardia (~ 55 bpm).
• Bizarre-looking QRS complexes.
• Gross QRS prolongation (> 300 ms).
• Massively peaked T waves.

This patient had a K+ of 9.9 mmol/L!

Any time you see an ECG that is…

• Blocked (AV block, bundle branch block)
• Bradycardic (sinus brady, slow AF, junctional bradycardia)
• Bizarre in appearance

… consider hyperkalaemia and check the K+ urgently!