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Related Concept Videos

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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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.
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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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Social-emotional experiences and cultural influences play significant roles in shaping gender development. During middle childhood, from ages 6 to 11, peer groups become dominant in reinforcing gender norms. Children in this age group often align with same-gender peer groups, which actively encourage behaviors that conform to traditional gender roles. For instance, boys may be discouraged from engaging in activities perceived as feminine, reinforcing culturally dictated norms about masculinity...
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Hypertension I: Introduction01:28

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Hypertension is a widespread, long-term medical condition where blood pressure in the arteries remains elevated. It is characterized by systolic blood pressure readings of 130 mm Hg or above or diastolic blood pressure (DBP) readings of 80 mm Hg or higher. Unmanaged hypertension poses significant health risks, making the distinction between primary (or essential) hypertension and secondary hypertension crucial, as their management and implications vary.Primary HypertensionPrimary hypertension,...
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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Sex differences in the developmental programming of hypertension.

N B Ojeda1, S Intapad, B T Alexander

  • 1Department of Pediatrics, University of Mississippi Medical Center, Jackson, MS, USA; Women's Health Research Center, University of Mississippi Medical Center, Jackson, MS, USA.

Acta Physiologica (Oxford, England)
|November 26, 2013
PubMed
Summary

Experimental models show that male offspring develop higher blood pressure than females after early life insults. This review explores mechanisms behind sex differences in developmental programming of hypertension.

Keywords:
blood pressureendothelinoxidative stressrenal nervesrenin angiotensin systemsex hormones

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Area of Science:

  • Cardiovascular Physiology
  • Developmental Biology
  • Endocrinology

Background:

  • Barker's hypothesis links low birthweight to hypertension.
  • Experimental models reveal sex differences in blood pressure programming, with males typically higher.
  • Pre-menopausal women generally have lower blood pressure than men, but this is unclear in low birthweight individuals.

Purpose of the Study:

  • To review mechanisms contributing to sex differences in developmental programming of blood pressure.
  • To explore how early life insults influence sex-specific blood pressure regulation.
  • To understand the role of renin-angiotensin system, hormonal milieu, oxidative stress, and adiposity.

Main Methods:

  • Review of findings from various experimental models of developmental programming.
  • Analysis of studies investigating sex differences in blood pressure regulation.
  • Examination of molecular and physiological pathways involved in hypertension development.

Main Results:

  • Male offspring consistently show higher blood pressure than females post-developmental insult.
  • Innate sex differences in renin-angiotensin system expression may play a role.
  • Hormonal influences and age-dependent changes in cardiovascular risk factors contribute to sex disparities.

Conclusions:

  • Sex differences in developmental programming of blood pressure are influenced by multiple factors.
  • Early life insults can exacerbate sex-specific vulnerabilities to hypertension.
  • Further research is needed to elucidate the complex interplay of factors driving sex differences in blood pressure regulation.