The annual incidence of spontaneous coronary artery dissection is estimated at 0.26 per 100,000 persons (0.33 in women and 0.18 in men), corresponding to approximately 800 new cases per year in the United States.  The true prevalence of spontaneous coronary artery dissection in the general population remains unknown; however, retrospective angiographic registries have reported a SCAD detection rate of 0.1 to 1.1% among all coronary angiograms performed. The case fatality rate of SCAD is relatively low compared with other causes of ACS, with an estimated in-hospital mortality rate of 0 to 4%. The average age at diagnosis of SCAD in females ranges from 44 to 53 years, although patients may present with SCAD in their second through ninth decades of life. SCAD has a strong predilection for young women with no or minimal traditional cardiovascular risk factors. It has been reported in all major racial and ethnic groups, with the majority of patients being white.
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