Department of Cardiology Shaanxi Provincial People''s Hospital Xi''an 710068 Shaanxi Province China;
Department of Cardiology Shaanxi Provincial People''s Hospital Xi''an 710068 Shaanxi Province China;
Department of Cardiology Shaanxi Provincial People''s Hospital Xi''an 710068 Shaanxi Province China;
Department of Cardiology Shaanxi Provincial People''s Hospital Xi''an 710068 Shaanxi Province China;
Coronary artery spasm; Multivessel coronary; Spontaneous; Intravascular ultrasound; Case report;