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Picture Quiz – Answers

The initial ECG (figure 1A) demonstrates a regularly irregular rhythm at approximately 80bpm. There is a profound first-degree atrioventricular(AV) block with a PR interval of over 400ms. There is

Discussion

Severe headaches are a frequent presentation to the Emergency Department, accounting for around 1% of presentations. Of these, 13-16% will have a sinister underlying pathology