Association between the insufficient improvement of the quantitative flow ratio and worsening outcomes in ST-segment elevated myocardial infarction: a multicentre prospective cohort study

Xiaosheng Guo, Jian Chen, Shenghui Xu, Chenyang Wang, Tianyu Hu, Qianglin Guan, Xing Yang, Jingguang Ye, Xida Li, Boyu Sun, Danqing Yu, Haojian Dong