Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-24 @ 11:16 PM
Ignite Modification Date:
2025-12-24 @ 11:16 PM
NCT ID:
NCT03380156
Brief Summary:
Heart failure (HF) is the leading cause of hospitalization in the US. Endothelial dysfunction, characterized by the decreased vasodilatory capacity of the vascular endothelium, is rampant in atherosclerotic diseases such as coronary artery disease and also in HF. Endothelial dysfunction also correlates with HF severity, progression, and mortality. It is postulated that endothelial dysfunction may in part be due to enhanced sympathetic drive, diminished parasympathetic drive, chronic inflammatory state thereby leading to reduced nitric oxide synthase activity in the vascular endothelium. Low-level vagus nerve stimulation (LLVNS) is an invasive way to modulate autonomic tone. Recent experimental and clinical data suggest that low-level transcutaneous vagal stimulation (TVS) (by stimulating the auricular branch of the vagus nerve located at the tragus of the external ear) may produce the same desired neuromodulator effect compared to LLVNS. The objective of this study is to determine the impact of TVS on endothelial dysfunction and arterial stiffness. The study population will include patients with chronic HFrEF. After performing baseline flow-mediated dilation (FMD), laser speckle contrast imaging(LSCI) and pulse wave analysis (PWA) testing, patients will be randomized to TVS or sham stimulation with a crossover design at different time points. The patient randomized to TVS arm will undergo stimulation for 1 hour followed by immediate measurement of FMD,LSCI and PWA. There will be a washout period of at least 24 hours with patient crossing over to the other arms thus serving as their self-control.
Study:
NCT03380156
Study Brief:
Protocol Section:
NCT03380156