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Cardiac emergencies in pregnancy and the postpartum period are rare but often life-threatening. An emergency physician’s differential diagnosis for chest pain in the peripartum patient often includes serious etiologies such as pulmonary embolism or myocardial infarction (MI). A lesser-known but important consideration on the differential for MI is that of a spontaneous coronary artery dissection (SCAD). SCAD is defined as an intramural hematoma within the coronary artery that compresses the true lumen. Expansion by increased pressures may lead to subsequent myocardial ischemia and infarction. This condition is the most common cause of pregnancy-associated MI and is reported as the cause of MI in 24% to 35% of all women younger than 50 years. This condition is predominately seen in young healthy females with no traditional risk factors for coronary artery or cardiac disease, and typically in the postpartum period. SCAD in the peripartum period is defined as pregnancy-associated spontaneous coronary artery dissection (PASCAD). Abnormal ECG changes, elevated troponins, and regional wall motional abnormalities on echocardiography are all diagnostic findings of SCAD, which can be ultimately confirmed with coronary angiography. Failure to immediately address this condition can lead to acute heart failure, cardiogenic shock, and death. Thrombolytic treatment may be harmful and is not recommended, and percutaneous coronary intervention can result in the iatrogenic propagation of further coronary dissection. As a result, the management for suspected SCAD involves emphasis on urgent transfer and urgent coronary artery angiography to determine appropriate treatment modalities.

Pregnancy-associated spontaneous coronary artery dissection (PASCAD): An etiology for chest pain in the young peripartum patient