The impact of left bundle branch block (LBBB) after transcatheter aortic valve implantation (TAVI) on cardiac function remains uncertain. Its pathophysiology resembles a predominant electrical problem rather than myocardial damage. We present a case of deep prosthetic implantation, accompanied by LBBB in whom early treatment with CRT produced a striking improvement in cardiac function, preventing the development of real LBBB-induced cardiomyophathy.