Yan-fen ZHOU, Fu YI, Guang-ping ZHANG, Min SHEN, Feng WU. Transseptal puncture and atrial fibrillation radiofrequency ablation guided by intracardiac echocardiography in 2 patients with atrial septal closure devices[J]. Chinese Heart Journal, 2021, 33(4): 463-463, 466. DOI: 10.12125/j.chj.202103080