Figure 2From: Myocardial first-pass perfusion cardiovascular magnetic resonance: history, theory, and current state of the artComparison between a dark rim artifact (DRA, top) and a real perfusion defect (bottom) from two different patients. From left to right are shown the contrast arrival to the left ventricle, the myocardium, and finally recirculation. A DRA artifact usually lasts for a few heartbeats while a real defect tends to be more persistent.Back to article page