The extent of complex fractionated atrial electrograms in the left atrium reflects age‐related electrical remodeling in patients with persistent atrial fibrillation - Yae Min Park; Dae In Lee; Hwan Cheol Park; Jaemin Shim; Jong‐Il Choi; Sang Weon Park; Young‐Hoon Kim (Journal of Arrhythmia, 2019)