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In 1990, the Danish brain death legislation was adopted by the Danish Parliament. Each year, around 100 patients in Denmark fulfil criteria for brain death/death by neurological criteria (BD/DNC). In this review of current Danish criteria including the indication for ancillary investigation, which in Denmark is digital subtraction angiography (DSA), we conclude that the time has come to revise the national BD/DNC criteria. We propose that visible anoxic-ischaemic encephalopathy on brain CT after cardiac arrest does not require evaluation by ancillary testing, and that CT-angiography can be used instead of DSA.