Spontaneous Retrograde Embolization From an Infarct-Related Artery to a Bystander Nonculprit Artery: An Unclear Pathophysiological Mechanism?

A 66-year-old woman was rescued by emergency medical service for acute posteroinferior myocardial infarction ([Figure 1A][1]). At the hospital, the patient was asymptomatic with regression of ST-segment elevations ([Figure 1B][1]); an echocardiogram showed hypokinesia of the lateral wall of the