Protocol used when deciding urgency of coronary angiography. (A) Flowchart of patients who are transferred direct to TPCH. (B) Flowchart of patients who are initially treated at a peripheral hospital. RWMA = regional wall motion abnormalities, TTE = transthoracic echocardiogram (where available). 1All patients suspected of an ischaemic cause for OOHCA are urgently transferred to TPCH and the priority of coronary angiography is decided upon arrival (as transfer times may be prolonged depending on distance).