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An OSCE case involving a 70-year-old man presenting with syncope and found to have complete heart block (CHB) on ECG. Candidates must identify the rhythm disturbance, discuss possible causes such as inferior MI, drug toxicity, or idiopathic degeneration, and outline management including atropine, IV isoprenaline, external pacing, and definitive PPM insertion. The case also tests communication with a junior doctor and clarity in explaining stepwise management and escalation.