* CV: cardiovascular (hypotension, tachycardia); R: respiratory (desaturation, symptoms of airway obstruction including stridor, throat tightness, dysphonia, cough, wheeze), S: skin (urticaria, angioedema), G: gastrointestinal (nausea, vomiting, abdominal discomfort, diarrhoea)
IHR, immediate hypersensitivity reaction
RCM, radiocontrast media