Myocardial scintigraphic evidence of Kounis syndrome: what is the aetiology of acute coronary syndrome?

A 66-year-old man underwent a dental procedure after receiving infiltration anaesthesia for alveolar ridge. After a few minutes, he developed nausea with cold sweat and was taken to the emergency room of our hospital. His electrocardiography showed ST-segment elevation in II, III, and aVF ( Panel A ). Emergent coronary angiography revealed that his left coronary artery and right coronary artery (RCA) had no significant stenosis and …