Efficacy of ivabradine in patients with poor heart rate control after beta-blocker use in acute myocardial infarction: a pragmatic randomized controlled trial - Li, Yongbin; Ren, Ying; Cheng, Lisong; Zhou, Xin; Li, Wenting; Zhang, Lingli; Cui, Jian; Yao, Zhuhua (Frontiers in Cardiovascular Medicine, 2025)