Related Experiment Video

Updated: Jul 6, 2026

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
11:26

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression

Published on: December 10, 2014

The role of the autonomic nervous system in hypertension: a bond graph model study

Shuzhen Chen1, Shaowen Zhang, Yuexian Gong

  • 1Department of Biomedical Engineering, Zhejiang University (Yuquan Campus), Zheda Road 38, 310027 Hangzhou, People's Republic of China.

Physiological Measurement
|April 11, 2008
PubMed

Insights

This study developed a cardiovascular model to understand the autonomic nervous system's (ANS) role in hypertension. The model shows impaired ANS worsens hypertension, but intact ANS offers protection against blood pressure spikes.

Area of Science:

  • Cardiovascular Physiology
  • Systems Biology
  • Computational Medicine

Background:

  • Hypertension involves complex cardiovascular regulation.
  • The autonomic nervous system (ANS) significantly influences blood pressure.
  • Understanding ANS regulation is crucial for managing hypertension.

Purpose of the Study:

  • To develop a bond graph model of the cardiovascular system incorporating autonomic nervous regulation.
  • To investigate the role of the ANS in hypertension and its impact on cardiovascular parameters.
  • To simulate the effects of impaired and absent ANS regulation on blood pressure and cardiac structure.

Main Methods:

  • Developed a detailed bond graph model of the cardiovascular system, including heart pump and regional circulations.
  • Incorporated sympathetic and parasympathetic activities to modulate vascular resistance, heart rate, and ventricular properties.
  • Simulated hypertension by elevating the baroreflex set point to represent ANS impairment.

Main Results:

  • Hypertension model showed increased systolic/diastolic blood pressure (SBP/DBP) and left ventricular wall thickness (LVWT).
  • Absence of ANS regulation led to further significant increases in SBP, DBP, and LVWT.
  • Partially impaired ANS (baroreflex set point 97 mmHg) still provided a protective effect against rapid blood pressure rise, which diminished with worsening regulation.

Conclusions:

  • The developed model accurately reflects human cardiovascular and baroreflex responses in hypertension.
  • The study highlights the critical role of the ANS in blood pressure regulation and cardiac protection.
  • The model serves as a valuable tool for studying cardiovascular pathophysiology and ANS regulatory mechanisms.

More Related Videos

Quantifying Acute Changes in Renal Sympathetic Nerve Activity in Response to Central Nervous System Manipulations in Anesthetized Rats06:30

Quantifying Acute Changes in Renal Sympathetic Nerve Activity in Response to Central Nervous System Manipulations in Anesthetized Rats

Published on: September 11, 2018

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...
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...
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...
Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
Blood Pressure01:30

Blood Pressure

Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the diastolic...
Blood Pressure01:24

Blood Pressure

The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...