Conventional cardiac resynchronization therapy upgrading and its effect on functional mitral regurgitation in patients with pacing-induced cardiomyopathy. - Adukauskaite A; Adukauskiene D; Senoner T; Bilgeri V; Spitaler P; Rubatscher A; Schgör W; Stühlinger M; Pfeifer BE; Hintringer F; Dichtl W; Barbieri F (Frontiers in cardiovascular medicine, 2026)