Discontinuous contraction in the left ventricle assessed by 2‐D speckle tracking echocardiography benefits from CRT. - Fujii, Aya; Inden, Yasuya; Yanagisawa, Satoshi; Mamiya, Keita; Okamoto, Hiroya; Sakamoto, Yusuke; Tomomatsu, Toshiro; Shibata, Rei; Murohara, Toyoaki (Pacing & Clinical Electrophysiology, 2019)