Fibromuscular Dysplasia: An Overlooked Cause of Spontaneous Coronary Artery Dissection.

Here, we present the case of a 59-year-old woman who arrived with pain in her left shoulder and jaw. During her hospital stay, she suffered a cardiac arrest but was successfully resuscitated. She subsequently underwent percutaneous coronary intervention, which revealed a spontaneous coronary artery dissection (SCAD) in the obtuse marginal branch. Further imaging identified fibromuscular dysplasia affecting the right internal carotid artery, while her renal arteries appeared normal. She later received a subcutaneous implantable cardioverter-defibrillator for secondary prevention. This case highlights the importance of considering fibromuscular dysplasia in patients presenting with SCAD, especially those without a prior history of cardiac disease.