Evaluation of left ventricular myocardial work in patients with hyperthyroidism with different heart rates with noninvasive pressure-strain loop based on two-dimensional speck tracking imaging

Qian Liu, Lixin Chen, Xiaohua Liu, Guijuan Peng, Xiaofang Zhong, Yuanyuan Sheng, Shuyu Luo, Yuxiang Huang, Jinfeng Xu, Yingying Liu