Ĭurrently a prolonged non-hemiplegic migraine with aura (NHMA) is classified as ‘persistent aura without infarction’ if the duration is equal or longer than 7 days. However the subsequent two versions of the ICHD removed PA from the classification. The first version of the ICHD included migraine with prolonged aura (PA) and defined it as migraine with one or more aura symptoms lasting more than 60 min and less than a week, occurring in the presence of normal neuroimaging findings. However these symptoms can last longer in a rare subtype of migraine with aura, namely hemiplegic migraine, which is not discussed in this paper. Īll of the first three editions of the International Classification of Headache Disorders (ICHD) have considered the individual symptoms of aura to be typical if the duration is more than five and less than 60 min. Aura comprises completely reversible visual, sensory, or language symptoms (occurring respectively in 98, 36 and 10% of auras). Worldwide migraine is the third most common disorder and around 30% of sufferers experience migraine auras. They do not differ from the other auras (even when their duration extends to 2 and/or 4 h) with the exception of a higher number of non-VS. There is limited literature on prolonged aura (PA - defined as an aura including at least one symptom for > 1 h and 2 h ( n = 23) or > 4 h ( n = 14) with the the others ( n = 193 and n = 202 respectively).
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