“…RVA pacing results in delayed left ventricular activation and can result in tricuspid regurgitation (TR), electromechanical dyssynchrony, and ventricular dysfunction. [1][2][3][4][5][6] Cardiac resynchronization therapy (CRT) using a right ventricular lead and Authors Asirvatham, Johnson, Danielson, Friedman, and Bruce report a pending patent application on pacing lead technology by the Mayo Clinic. a left ventricular pacing lead has proved beneficial for patients with symptomatic congestive heart failure, depressed ventricular function, and left bundle branch block.…”