Cardiology Department II Shandong Provincial Qianfoshan Hospital(The First Affiliated Hospital of Shandong First Medical University) Ji’nan 250014 People’s Republic of China;
Cardiology Department II Shandong Provincial Qianfoshan Hospital(The First Affiliated Hospital of Shandong First Medical University) Ji’nan 250014 People’s Republic of China;
Cardiology Department II Shandong Provincial Qianfoshan Hospital(The First Affiliated Hospital of Shandong First Medical University) Ji’nan 250014 People’s Republic of China;
Cardiology Department II Shandong Provincial Qianfoshan Hospital(The First Affiliated Hospital of Shandong First Medical University) Ji’nan 250014 People’s Republic of ChinaCardiology Department II Affiliated Hospital of Shandong University of Traditional Chinese Medicine Ji’nan 250014 People’s Republic of China;
Cardiology Department II Shandong Provincial Qianfoshan Hospital(The First Affiliated Hospital of Shandong First Medical University) Ji’nan 250014 People’s Republic of ChinaShandong First Medical University Tai’an 271016 People’s Republic of China;
Cardiology Department II Shandong Provincial Qianfoshan Hospital(The First Affiliated Hospital of Shandong First Medical University) Ji’nan 250014 People’s Republic of China;
Variant angina; coronary spasm; transient ST segment changes; coronary angiography; troponin levels; calcium channel blockers;