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It's been a while since I did anything with cardiac data, but I remember that the small proportion of patients who met the Utstein criteria combined with generally patchy data collection meant my area's performance was calculated using only a handful of cases. Dr Moore's comments at the end of the article serve to reinforce this recollection.

Without the patient numbers and data completeness figures, it's impossible to draw any real conclusions from the table above.

London may be performing better than the rest of the country, it may be due to the specialised 24-hour centres, but the data presented don't give us any greater clarity.