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Value of vena contract (panel (A)) and proximal isosurface area radius (panel (B)) of tricuspid regurgitation before and after Optimizer® Smart implantation. ns: non-significance. ICD-VR: single-chamber implantable cardioverter-defibrillator; ICD-DR: dual-chamber implantable cardioverter-defibrillator; CRT-D: cardiac resynchronization therapy with implantable cardioverter-defibrillator back-up.
