Impact of Guideline-Directed Medical Therapy on Left Ventricular Function in Heart Failure Patients with Conventional Right Ventricular Pacing
Abstract
Background/Objectives: Heart failure (HF) in patients with conventional right ventricular pacing with significant pacing percentages is still a subject of concern, and management of HF in this population has historically been difficult; however, novel HF pillar medications, such as SGLT2 inhibitors (SGLT2i) and angiotensin receptor/neprilysin inhibitors (ARNi), have fundamentally transformed contemporary pharmacological HF management. The aim of this study was to assess left ventricular (LV) function after current guideline-directed medical therapy (GDMT) in patients with chronic right ventricular (RV) pacing and HF. Methods: Patients with a lifetime ventricular pacing percentage > 20% (Vp > 20%) and HF diagnosed according to ESC guideline criteria were included. Device interrogation and transthoracic echocardiography (TTE), including assessment of left ventricular ejection fraction (LVEF) and mitral annular plane systolic excursion (MAPSE), were performed at GDMT initiation and during subsequent follow-up. Changes in LVEF and MAPSE were assessed overall and according to baseline HF phenotype. Multivariable linear regression analyses were performed to identify independent predictors of changes in LVEF and MAPSE. Results: Among 550 conventionally paced patients screened for HF, 127 (23.1%) met the inclusion criteria and underwent GDMT initiation. Mean age was 68.2 ± 12.1 years, and mean follow-up duration was 10.2 ± 6.3 months. Baseline LVEF and MAPSE were 48.7 ± 6.3% and…
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