Abstract
Immune-mediated acute coronary syndrome, also known as Kounis syndrome (KS), is an underrecognized and challenging diagnosis. In this case report, we present a case of cardiac arrest secondary to iodinated contrast allergy requiring emergent cardiac catheterization and hemodynamic support secondary to type 2 KS. KS necessitates a high index of clinical suspicion by the treating physician in order to address both the hypersensitivity reaction and its cardiac implications. Learning objectivesKounis syndrome (KS) is a clinically distinct entity from anaphylaxis; managing KS in the same way as anaphylaxis can worsen cardiac demand and ischemia. In addition, KS may present as coronary vasospasm or plaque rupture; regardless, percutaneous coronary intervention (PCI) should be performed as worse outcomes have been described in cases where PCI is not performed or delayed.
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