Left atrioventricular coupling index by 2D and 3D echocardiography: association with exercise capacity in chronic kidney disease - Wang, Ruonan; Zhao, Fan; Shi, Wenjia; Sun, Hanliang; Tang, Haiyang; Hua, Jing; Chu, Aiai (Quantitative Imaging in Medicine and Surgery; Publish Ahead of Print, 2026)