title: Two cases with spontaneous spasm of left main trunk.
mesh_terms: D000328:Adult; D003097:Collateral Circulation; D017023:Coronary Angiography; D003329:Coronary Vasospasm / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged