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Related Concept Videos

Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

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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...
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Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

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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,...
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Blood Pressure01:30

Blood Pressure

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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...
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Hormonal Regulation of Blood Pressure01:17

Hormonal Regulation of Blood Pressure

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Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction...
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Neural Regulation of Blood Pressure01:18

Neural Regulation of Blood Pressure

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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...
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Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

Hypertension III: Clinical Manifestations and Diagnostic Studies

33
Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
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Updated: Jul 25, 2025

Assessing Murine Resistance Artery Function Using Pressure Myography
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Assessing Murine Resistance Artery Function Using Pressure Myography

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Vascular function: a key player in hypertension.

Hirofumi Tomiyama1,2

  • 1Department of Cardiology, Tokyo Medical University, Tokyo, Japan. tomiyama@tokyo-med.ac.jp.

Hypertension Research : Official Journal of the Japanese Society of Hypertension
|June 27, 2023
PubMed
Summary

Vascular dysfunction is a key factor in hypertension, contributing to cardiovascular disease through a vicious cycle. Further research is needed to develop strategies for improving vascular function and outcomes in hypertensive patients.

Keywords:
Arterial stiffnessEndothelial functionHypertensionVascular Function

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Assessment of Vascular Tone Responsiveness using Isolated Mesenteric Arteries with a Focus on Modulation by Perivascular Adipose Tissues
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Area of Science:

  • Cardiovascular Science
  • Hypertension Research
  • Vascular Biology

Background:

  • The arterial system's primary roles include efficient blood delivery and maintaining vascular homeostasis.
  • Both endothelial and medial layers are crucial for regulating blood flow, distribution, and vascular protection.
  • Vascular dysfunction is implicated in cardiovascular diseases via mechanisms like impaired perfusion and abnormal hemodynamics.

Purpose of the Study:

  • To explore the critical role of vascular dysfunction in the pathophysiology of hypertension.
  • To investigate the relationship between vascular dysfunction, blood pressure variability, and cardiovascular outcomes.
  • To highlight the need for strategies to improve vascular function in hypertensive individuals.

Main Methods:

  • Assessing endothelial function using flow-mediated vasodilatation.
  • Evaluating medial layer function via pulse wave velocity.
  • Measuring arterial blood supply function with the ankle-brachial pressure index.

Main Results:

  • Vascular dysfunction contributes to various forms of hypertension and is part of a vicious cycle with abnormal blood pressure variability.
  • This cycle is linked to hypertensive organ damage and adverse cardiovascular events.
  • The effectiveness of vascular function management on cardiovascular outcomes in hypertension requires further clarification.

Conclusions:

  • Vascular dysfunction plays a pivotal role in hypertension's development and progression.
  • A vicious cycle exists between vascular dysfunction, elevated blood pressure, and adverse outcomes.
  • Developing strategies to improve vascular function is essential for managing hypertension and its complications.