In bivariate analysis, the main factors associated with SD were: Western European origin (p = 0.001), a history of cardiovascular disease (p = 0.031), confusion (p = 0.001), dehydration defined as the need for oral or intravenous rehydration (p = 0.009), relative hypovolemia defined as the need for at least one vascular filling (p = 0.007), an increase in aspartate-amino-transferase (ASAT) level (p = 0.036) and the delay from symptom to consultation (p = 0.010) (Table 1). This evidence concerns the gene ABCB7 and cardiovascular disorder.