The Association of a classical left bundle Branch Block Contraction Pattern by vendor-independent strain echocardiography and outcome after cardiac resynchronization therapy. - Emerek, Kasper; Friedman, Daniel J.; Sørensen, Peter L.; Hansen, Steen M.; Larsen, Jacob M.; Risum, Niels; Thøgersen, Anna Margrethe; Graff, Claus; Atwater, Brett D.; Kisslo, Joseph; Søgaard, Peter (Cardiovascular Ultrasound, 2019)