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Related Concept Videos

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...
Hormonal Regulation of Blood Pressure01:17

Hormonal Regulation of Blood Pressure

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 while...
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...
Factors affecting Blood pressure01:28

Factors affecting Blood pressure

Several physiological and lifestyle factors influence blood pressure (BP). Understanding these factors is crucial as they are significant in patient education and blood pressure management.
Physiological Factors:
Antihypertensive Drugs: Action of Diuretics01:16

Antihypertensive Drugs: Action of Diuretics

Diuretics are antihypertensive drugs used to treat hypertension resulting from sodium and water retention. Sodium, vital for fluid balance and nerve or muscle function, is regulated by the kidneys through millions of nephrons. Blood enters nephrons via afferent arterioles, which branch into capillaries called glomeruli. These filter blood plasma, allowing water and solutes, like sodium ions, to pass through capillary walls into Bowman's capsule. The filtrate then flows through various tubules...

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A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
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Does vitamin D modulate blood pressure?

Hector Tamez1, Sahir Kalim, Ravi I Thadhani

  • 1Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.

Current Opinion in Nephrology and Hypertension
|January 10, 2013
PubMed
Summary
This summary is machine-generated.

Vitamin D deficiency is linked to high blood pressure in observational studies. However, randomized trials show mixed results, indicating more research is needed for vitamin D

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Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells
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Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells

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Last Updated: May 15, 2026

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09:29

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells

Published on: March 5, 2019

Area of Science:

  • Endocrinology
  • Cardiovascular Medicine
  • Nutritional Science

Background:

  • High prevalence of both vitamin D deficiency and hypertension.
  • Uncertainty regarding vitamin D's role in blood pressure regulation.
  • Need to evaluate vitamin D's potential in hypertension management.

Purpose of the Study:

  • Review current data on vitamin D and blood pressure.
  • Focus on research from the past two years.
  • Assess vitamin D's role in hypertension prevention and management.

Main Methods:

  • Review of animal and human observational studies.
  • Analysis of recent randomized controlled trials (RCTs).
  • Inclusion of meta-analyses on vitamin D and blood pressure.

Main Results:

  • Animal studies show vitamin D affects the renin-angiotensin-aldosterone axis.
  • Observational studies link vitamin D deficiency to increased blood pressure.
  • RCTs present conflicting results; some show no effect, others a significant reduction in systolic blood pressure.

Conclusions:

  • Observational data suggest an association between vitamin D deficiency and hypertension.
  • Randomized trials and meta-analyses provide inconclusive evidence.
  • Further large-scale RCTs in patients with severe deficiency and hypertension are required.