Near-fatal primary manifestation of anti-aquaporin 4-positive neuromyelitis optica spectrum disorder survived without neurological sequelae: A case report

•Area postrema syndrome might be the first manifestation of NMOSD. •Area postrema syndrome might lead to “neurogenic stunned myocardium”. •NMOSD might have life-threatening cardiac complications. •Early initiation of immunotherapy significantly improves prognosis.