Disproportionate functional mitral regurgitation predicts a favourable response after MitraClip implant in patients with advanced heart failure. Real-world evidence of a new conceptual framework. - Frea, Simone; Pidello, MD, Stefano; Boretto, MD, Paolo; Rettegno, MD, Sara; Giordana, MD, Francesca; Montefusco, MD, Antonio; D'Amico, Maurizio; La Torre, Michele W.; Rinaldi, Mauro; De Ferrari, Gaetano Maria (International Journal of Cardiology, 2021)