Cardiovascular Magnetic Resonance Guided Open Artery Trial for Revascularization of Late Presenting ST Elevation Myocardial Infarction

Patients with STEMI are usually treated with primary PCI in contemporary practice. However, primary PCI is currently deemed unbeneficial or potentially harmful in patients presenting late after a STEMI. There is limited data to suggest that patients who may have viable myocardium despite presenting late with a STEMI may derive benefit from PCI, which may be denied in current practice. CMR imaging is the reference modality for assessment of left ventricular function and myocardial viability. This feasibility study will randomise late presenting STEMI patients with CMR documented viability to PCI plus optimal medical therapy (OMT) versus OMT alone. The investigator hypothesises that PCI in this cohort will improve left ventricular remodelling and function. Favourable results will lead to an adequately powered multi-centre trial with the potential to improve the management of late resenting STEMI patients and impact on clinical practice guidelines.