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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...
Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
Autoregulation of Blood Flow01:17

Autoregulation of Blood Flow

Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation.
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

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...
Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

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.
Raynaud's disease, also known as Raynaud's phenomenon, is a...
Chemical Factors Affecting Respiration Centers01:31

Chemical Factors Affecting Respiration Centers

Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
CO2 has a potent influence on respiration and is strictly regulated. Under...

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Related Experiment Video

Updated: May 11, 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

Peripheral baroreflex and chemoreflex function after eversion carotid endarterectomy.

Massimiliano M Marrocco-Trischitta1, George Cremona, Daniela Lucini

  • 1Vascular Surgery, Vita-Salute San Raffaele University, Milan, Italy. max_marrocco@yahoo.com

Journal of Vascular Surgery
|May 2, 2013
PubMed
Summary
This summary is machine-generated.

Eversion carotid endarterectomy (e-CEA) better preserves arterial baroreflex function compared to standard CEA (s-CEA), suggesting it does not cause permanent carotid sinus denervation. This technique maintains both baroreflexes and chemoreflexes long-term.

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Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing
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Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing

Published on: October 25, 2019

Related Experiment Videos

Last Updated: May 11, 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

Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing
05:45

Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing

Published on: October 25, 2019

Area of Science:

  • Cardiovascular Physiology
  • Surgical Neurology
  • Autonomic Nervous System Function

Background:

  • Carotid endarterectomy (CEA) is a surgical procedure to remove plaque from carotid arteries.
  • Standard CEA (s-CEA) can potentially impair arterial baroreflex function.
  • The eversion technique for CEA (e-CEA) is an alternative method with potential benefits.

Purpose of the Study:

  • To assess the long-term impact of e-CEA on arterial baroreflex and peripheral chemoreflex function.
  • To compare the effects of e-CEA versus s-CEA on autonomic cardiovascular modulation.
  • To determine if e-CEA leads to permanent carotid sinus denervation.

Main Methods:

  • 13 patients underwent bilateral e-CEA and 16 underwent bilateral s-CEA (2001-2006).
  • Exclusion criteria included age >70, diabetes, COPD, ischemic heart disease, beta-blocker use, arrhythmias, neurological deficits, restenosis, and prior neck surgery/irradiation.
  • Standard cardiovascular reflex tests (orthostatic tests, deep breathing, Valsalva maneuver) and chemoreflex sensitivity tests (hypoxia rebreathing) were performed. Heart rate and systolic arterial pressure variability were analyzed.

Main Results:

  • Baroreflex sensitivity was significantly better preserved after e-CEA compared to s-CEA at rest and during standing (P=.001).
  • Chemoreflex sensitivity to hypoxia was reduced in both patient groups compared to controls but did not differ between e-CEA and s-CEA groups.
  • Both e-CEA and s-CEA groups showed reduced baroreflex performance compared to young controls.

Conclusions:

  • Eversion carotid endarterectomy (e-CEA) preserves baroreflexes and chemoreflexes long-term, indicating it does not cause permanent carotid sinus denervation.
  • e-CEA does not increase long-term arterial pressure variability.
  • Perioperative hemodynamic derangements following e-CEA are likely due to temporary surgical trauma effects.