The impact of pulmonary hypertension on prognosis in moderate-to-severe mitral regurgitation patients treated with transcatheter edge-to-edge mitral valve repair: a comprehensive meta-analysis - Wei, Zhili; Shao, Xinquan; An, Zhijing; Chang, Yixuan; Liu, Shidong; Luo, Ziran; Chen, Yang; Song, Bing (Frontiers in Cardiovascular Medicine, 2025)