Low Level Tragus Stimulation in Acute Decompensated Heart Failure
Acute Decompensated Heart Failure (ADHF) is a major cause of morbidity and mortality. It is associated with increased systemic inflammation. Previous studies have demonstrated increased levels of cytokines such as C-reactive protein (CRP), interleukin-1 (IL-1), interleukin-6 (IL-6), interleukin-10 (IL-10) and Tumor Necrosis Factor alpha (TNFα) in patients with heart failure (HF). Increased activity of sympathetic nervous system in ADHF is linked to inflammation. Previous anti-inflammatory drug therapies in HF have demonstrated no significant impact on cardiovascular outcomes. Low-level vagus nerve stimulation (LLVNS) is a non-invasive way to modulate autonomic tone and thereby inflammation. Vagal nerve stimulation is thought to increase the parasympathetic activity and suppress the sympathetic activity. Clinical studies of vagal stimulation in chronic HF have been negative. Recent experimental and clinical data suggest that low level tragus nerve stimulation (LLTNS) may produce the same desired neuromodulator effect compared to LLVNS. It is however unknown if LLTNS in ADHF will directly lead to a reduction in the levels of pro-inflammatory cytokines (CRP, IL-1, IL-6 and TNF-α) and an increase in the level of anti-inflammatory marker IL-10. heart rate variability may also be abnormal in ADHF. The objective of this proposal is to determine the impact of LLTS on inflammatory cytokines, heart failure biomarkers(Pro BNP) and HRV in patients with ADHF.In addition we will study the impact on dyspnea resolution and change in renal function during hospitalization. Patients will be randomized to either active or sham stimulation (2 hours daily). Serum collected will (post-admission and discharge day) will be used for cytokine measurement. We will also measure daily ECG to assess HRV and patient assessed dyspnea scale.This investigation will likely establish the first evidence of the effects of LLTS on the suppression of inflammation and improvement in dyspnea, natriuretic peptides, renal function and HRV in patients presenting with ADHF.
Conditions:
🦠 Acute Decompensated Heart Failure
🗓️ Study Start (Actual) September 2016
🗓️ Primary Completion (Estimated) September 2024
✅ Study Completion (Estimated) September 2024
👥 Enrollment (Estimated) 100
🔬 Study Type INTERVENTIONAL
📊 Phase NA
Locations:
📍 Oklahoma City, Oklahoma, United States

📋 Eligibility Criteria

Description

    Inclusion Criteria:

    • Patients admitted with ADHF

    Exclusion Criteria:

    • 1. Refusal to consent
    • 2. Complex congenital heart disease (Tetralogy of Fallot patients, single ventricle physiology)
    • 3. Recurrent vaso-vagal syncopal episodes
    • 4. Unilateral or bilateral vagotomy
    • 5. Sick sinus syndrome
    • 6. 2nd or 3rd degree AV block
    • 7. bifascicular block or prolonged 1st degree AV block (PR\>300ms)
    • 8. Pregnant patients
    • 9. Prisoners
    • 10. Advanced renal dysfunction(defined as eGFR \< 30, stage 4 or 5 chronic kidney disease)
    • 11. Hepatitis C or HIV
    • 12. Acute Myocardial infarction
Ages Eligible for Study: 18 Years to 80 Years (ADULT, OLDER_ADULT)
Sexes Eligible for Study: ALL
Accepts Healthy Volunteers: No

🗓️ Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

  • First Submitted 1 September 2016
  • First Submitted that Met QC Criteria 7 September 2016
  • First Posted 13 September 2016

Study Record Updates

  • Last Update Submitted that Met QC Criteria 24 August 2023
  • Last Update Posted 29 August 2023
  • Last Verified August 2023