Background A 55 year old patient presented late to the emergency department following an ST elevation myocardial infarction (STEMI). Coronary angiogram demonstrated occluded left anterior descending artery with backfilling from collaterals. The patient was referred for an in-patient cardiac MRI scan (CMRI) to quantify left ventricular (LV) function and viability. A repeat CMRI was requested 3 m...