Spontaneous Dissecting Aneurysm of Coronary Artery in a Pregnant Woman at Term

We describe a case of spontaneous dissecting aneurysm of the circumflex coronary artery in a 44-year-old primigravida at term with no vascular risk factors. Spontaneous coronary artery dissection is a very rare condition with a greater prevalence in women, postpartum in particular. The left anterior descending artery is the most frequently affected. Histologically, the most common finding is a hematoma occupying the outer third of the media, resulting in complete compression of the true lumen. Arterial wall changes during pregnancy together with hemodynamic factors, a lytic action of protease released from eosinophils, and intimal tears are the main hypotheses considered to explain the etiology of spontaneous coronary artery dissection.