Diagnostic Study of Rapid Regadenoson Stress Cardiovascular Magnetic Resonance (CMR) to Detect Coronary Artery Disease

Inclusion Criteria: * Aged 18 years or older * Scheduled for invasive coronary angiography Exclusion Criteria: * Inability to give informed consent * Possible pregnancy (confirmed by urine test) * Women who are breastfeeding * Severe claustrophobia * Inability to lie flat for 20-30 minutes (the anticipated amount of time to complete the MRI procedure) * Individuals with cochlear implants * Individuals with non-MRI compatible aneurysm clips * Potential contraindications to regadenoson use due to: Severe lung disease (active wheezing) Severe bradycardia (heart rate \< 40 beats/min) Second- or third-degree atrioventricular heart block Sick sinus syndrome History of Long QT syndrome Severe hypotension (systolic BP \< 80 mm Hg) Decompensated heart failure * Contraindication to administration of Gadolinium (Gd) based contrast agents (GBCA): Stage 4 or 5 chronic kidney disease (eGFR \< 30 ml/min/1.73 m2) Known allergy to GBCA Special Considerations: \- Although individuals who have an occupational history of welding, grinding, or other metal work will not be excluded from the study, they must undergo an orbital x-ray, to exclude any occult metal fragments, before they can participate in this study.