Life-threatening cardiac failure in a healthy young female with Irukandji syndrome

We present a case of a previously well 24-year-old female patient who devel oped severe and life-threatening Irukandji syndrome that required ventilati on and inotropic support. This case provides further evidence that there ar e jellyfish other than the Irukandji jellyfish that can cause cardiac decom pensation, and there is a suggestion that application of a pressure immobil ization bandage may worsen the envenomation. We include our recommended tre atment for the Irukandji syndrome.