Reverse atrial electrical remodeling induced by cardiac resynchronization therapy.

Purpose: Cardiac resynchronization therapy (CRT) has been shown to improve left atrial function; however the effect on reverse electrical remodeling has been poorly evaluated. We hypothesized that CRT might induce reverse atrial electrical remodeling manifesting in the surface ECG as a shortening in P-wave duration.

Methods: Patients with CRT and more than 92% biventricular pacing at minimum follow-up of 1 year were included in the analysis.