A young man presents with palpitations after chronic loperamide misuse (400–600 mg/day). An ECG is performed.

Loperamide misuse and long QT

1. Describe and interpret the ECG. 2 marks

2. Describe the rhythm strip and state your diagnosis. 2 marks

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3. List four toxicological and four non-toxicological causes of these ECG findings. 8 marks

4. Outline your management priorities for this patient. 6 marks