ALTE was defined by a consensus conference in 1986 as:
"An episode that is frightening to the observer and that is characterized by some combination of apnea (central or occasionally obstructive), color change (usually cyanotic of pallid but occasionally erythematous or plethoric), marked change in muscle tone (usually marked limpness), choking, or gagging. In some cases, the observer fears that the infant has died. Previously used terminology such as "aborted crib death" or "near-miss SIDS should be abandoned because it implies a possibly misleadingly close association between this type of spell and SIDS."
In the literature, ALTE has been defined in different manners giving an estimated to be 0.05 to 1 percent incidence. Most of these episodes occur before 2 months of age (especially before 10 weeks of age). Risk factors for having an ALTE are prior episodes, respiratory illness, young age, materal smoking, prematurity, post-mature infants and first-born infants.
National Institutes of Health Consensus Development Conference on Infantile Apnea and Home Monitoring, Sept 29 to Oct 1, 1986.
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