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Related Concept Videos

Neural Regulation of Blood Pressure01:18

Neural Regulation of Blood Pressure

The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
Antihypertensive Drugs: Angiotensin II Receptor Blockers01:30

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In the renin-angiotensin-aldosterone system, a hormone called angiotensin II plays a crucial role. It binds to the AT1 receptors in vascular smooth muscles coupled with Gq proteins. The activation of these receptors activates an enzyme called phospholipase C, which releases two molecules: inositol trisphosphate and diacylglycerol. These molecules cause a chain reaction that leads to the phosphorylation of myosin light chains and promotes interaction between actin and myosin, leading to smooth...
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The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
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The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
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Related Experiment Video

Updated: May 21, 2026

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
09:56

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice

Published on: February 14, 2021

Sustained acute voltage-dependent blood pressure decrease with prolonged carotid baroreflex activation in

Teba Alnima1, Ingrid Scheffers, Peter W De Leeuw

  • 1Department of Internal Medicine, Maastricht University Medical Center, Maastricht University, Maastricht, The Netherlands.

Journal of Hypertension
|June 26, 2012
PubMed
Summary
This summary is machine-generated.

Long-term carotid baroreflex stimulation effectively lowers blood pressure in resistant hypertension. The voltage-dependent blood pressure decrease remains consistent, indicating no significant adaptation or nerve fatigue with continuous use of the Rheos system.

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Last Updated: May 21, 2026

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
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07:51

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Published on: September 22, 2011

Area of Science:

  • Cardiovascular Medicine
  • Biomedical Engineering
  • Hypertension Research

Background:

  • Resistant hypertension affects a significant patient population.
  • Carotid baroreflex stimulation is an emerging treatment for resistant hypertension.
  • The Rheos system delivers chronic electrical stimulation to the carotid baroreceptors.

Purpose of the Study:

  • To assess the long-term efficacy and safety of carotid baroreflex stimulation.
  • To determine if the voltage-dependent blood pressure reduction is maintained over time.
  • To investigate potential response adaptation or nerve fatigue with chronic Rheos system use.

Main Methods:

  • Forty-five patients with resistant hypertension received the Rheos system.
  • A voltage response test (VRT) was performed at baseline, 4 months, and 13 months.
  • Blood pressure and heart rate were measured during incremental voltage increases (1-6V).

Main Results:

  • Mean blood pressure was significantly lower at 4 and 13 months compared to baseline.
  • The pattern of blood pressure decrease during VRT remained consistent over time.
  • Maximum systolic blood pressure reduction during VRT did not change with long-term therapy.

Conclusions:

  • The voltage-dependent blood pressure and heart rate reduction from electrical baroreflex stimulation is preserved long-term.
  • Continuous carotid baroreflex activation with the Rheos system shows no evidence of response adaptation or nerve fatigue.
  • This suggests sustained therapeutic potential for resistant hypertension management.