Abstract Case Report: A 39‐year‐old female presented with chest pain, shortness of breath, and was diagnosed with ST‐elevation myocardial infarction. Coronary angiogram revealed left main coronary artery (LMCA) spontaneous coronary artery dissection (SCAD). Following conservative treatment, the patient continued experiencing shortness of breath and chest pain. The cause of these symptoms was difficult to ascertain, even with further investigation. The patient underwent coronary artery bypass grafting, aortic valve replacement, and aortic root replacement with reimplantation of coronary buttons. Following aortotomy, a dissection flap formed by the SCAD was identified, intermittently occluding the LMCA. This was thought to cause their intermittent and severe heart failure symptoms as the flap would intermittently occlude the LMCA causing severe myocardial ischemia. Conclusion: This patient's presentation of a dissection flap intermittently occluding the LMCA demonstrates an abnormal manifestation of SCAD. Increased awareness of this presentation is imperative to ensure future cases are correctly identified and managed.
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