. Analysis of clinical differentiation of the course of ALTE in children with primary and secondary acid GER under conservative therapy was performed. Under this therapy, gradual regression of ALTE symptoms was achieved in all (8/100.0%) patients, with a tendency to longer time of improvement in children with secondary GER. Typical and atypical symptoms of GER receded in a subgroup with primary GER and were alleviated in a subgroup with secondary GER