Key result
SCAD is linked to ~73% lower 1-year mortality compared to non-SCAD MI.
Why the study?
The study was conducted to report the characteristics and long-term clinical outcomes of patients with spontaneous coronary artery dissection (SCAD) and to identify factors associated with recurrent SCAD.
Does spontaneous coronary artery dissection (SCAD) have different long-term mortality compared to non-SCAD acute myocardial infarction, and what factors are associated with recurrent SCAD?
Cohort (n=26,598)
Yes
Does spontaneous coronary artery dissection (SCAD) have different long-term mortality compared to non-SCAD acute myocardial infarction, and what factors are associated with recurrent SCAD?
Effect estimate: HR 0.27 (95% CI 0.14-0.51)
Absolute Event Rate: 2.4% vs 8.8%
p-value: p=<0.001
Patients with SCAD have favorable survival driven primarily by their younger age and fewer comorbidities, but face a persistent long-term risk of recurrence, particularly those with fibromuscular dysplasia or migraines.
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SCAD-linked AMI shows lower mortality than non-SCAD cases due to younger age and fewer comorbidities; leaves open independent effects and recurrence surveillance needs.
Clare et al. (2019) conducted a cohort in Spontaneous Coronary Artery Dissection (SCAD) (n=26,598). null vs. Patients without SCAD was evaluated on 1-year mortality (HR 0.27, 95% CI 0.14-0.51, p=<0.001). Patients with spontaneous coronary artery dissection experienced a 1-year mortality of 2.4%, significantly lower than 8.8% in those without SCAD, indicating lower mortality associated with SCAD.
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