Electrical heart failure treatment in the Goldilocks zone: cardiac contractility modulation proves equally effective for heart failure control in HFrEF patients with mid-range QRS durations - Fastner, C; Varma, N; Rao, I; Falk, P; Remppis, B A; Cranke, G; Najarian, K; Kane, T; Burkhoff, D; Akin, I; Kuschyk, J (European heart journal, 2024)