The Destabilized Artery: A Case of Spontaneous Coronary Artery Dissection Presenting as Unstable Angina.

Spontaneous coronary artery dissection (SCAD) is increasingly being recognized as a cause of acute coronary syndrome (ACS). This increased recognition of SCAD has been noted in patients with and without traditional cardiovascular risk factors such as diabetes mellitus, hyperlipidemia, and cigarette smoking. The increasing incidence is believed to be due to recent advances in diagnostic and coronary imaging modalities. The most common presenting feature is chest pain or discomfort. Normal troponin level does not rule out SCAD as the definitive diagnosis is made on coronary angiography. Percutaneous intervention (PCI) for SCAD has been associated with lower success rates compared to PCI for atherosclerotic coronary artery disease. Medical management is, therefore, the initial treatment of choice.