Is the right ventricular function affected by permanent pacemaker

AIMS The effect of Right Ventricular (RV) pacing on Left Ventricular (LV) function has been extensively evaluated, but the effect on RV function per se has not been evaluated systematically. We aimed to assess the effect of dual chamber pacemaker on RV function. METHODS AND RESULTS All consecutive patients undergoing dual chamber pacemaker from January 2018 to March 2019 for AV block with a structurally normal heart were included. They underwent pre-procedure detailed echocardiography [including three-dimensional (3D) RV Ejection Fraction (RVEF)], a screening echocardiogram 2 days after pacemaker implantation and again a detailed echocardiogram at six-month follow-up. We compared the baseline echocardiographic RV parameters with those six months after the pacemaker implantation. A total of 60 patients underwent successful pacemaker implantation. At six months, most of the patients were pacemaker dependant with pacing percentage of 98.9% ± 2.4%; there was a significant increase in TR and a mean drop in RVEF by 2.8±5%, with 23 (38.3%) having at least a 5% decrease in RVEF. The drop in RVEF positively correlated with TR vena contracta at six months but did not correlate with pulmonary artery systolic pressure at six months. CONCLUSION Our study shows the presence of demonstrable RV dysfunction as early as six months in a majority of patients who have undergone pacemaker implantation. This article is protected by copyright. All rights reserved.