Cardiac MRI in Front Line for the Diagnosis of Coronary Artery Disease as the Etiology of Left Ventricular Dysfunction

When a patient is newly diagnosed of systolic dysfunction without obvious etiology (such as rhythmic, ischemic, or valvular disease), most of the time a coronary angiography is performed. In this situation, the investigators aim to evaluate a strategy with CMR as the front line exam, and invasive coronary angiography performed only in case of ischemic scar on CMR Additionally, a secondary analysis of the collected CMR images will be performed by the MIRACL.AI core lab (AP-HP, Paris) using artificial intelligence (AI) algorithms. This analysis aims to enhance the diagnostic accuracy of coronary artery disease (CAD) detection in patients with reduced left ventricular ejection fraction (rLVEF).