Familial migraine and coronary artery spasm in two siblings.

A common pathophysiology for the clinical association of variant angina and migraine has been suggested, but the pathogenesis of both illnesses is yet unknown. Our report presents two siblings with both illnesses and a familial history of migraine where coronary artery spasm was documented, spontaneously in one and after the administration of ergonovine maleate in the other one. Our study strongly supports the hypothesis that genetic factors possibly play a role in the etiology of variant angina and migraine at least in some patients.