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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...
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,...
Hypertension I: Introduction01:28

Hypertension I: Introduction

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

Hypertension III: Clinical Manifestations and Diagnostic Studies

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...
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...
Hypertension IV: Drug Therapy and Lifestyle Modifications01:28

Hypertension IV: Drug Therapy and Lifestyle Modifications

Multiple classes of antihypertensive medications are employed in treating hypertension. The most commonly recommended first-line treatments include:Thiazide Diuretics, such as chlorthalidone, increase sodium and water excretion from the body, reducing blood volume and blood pressure.Angiotensin-converting enzyme inhibitors, like lisinopril, block the conversion of angiotensin I to II, a potent vasoconstrictor lowering blood pressure.Angiotensin II Receptor Blockers (ARBs) prevent angiotensin II...

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Related Experiment Video

Updated: Jun 23, 2026

A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis
06:19

A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis

Published on: January 7, 2018

Developmental programming and hypertension.

Anne Monique Nuyt1, Barbara T Alexander

  • 1Department of Pediatrics, Research Center, CHU Sainte-Justine, Université de Montréal, Canada. anne-monique.nuyt@recherche-ste-justine.qc.ca

Current Opinion in Nephrology and Hypertension
|May 13, 2009
PubMed
Summary
This summary is machine-generated.

Early life exposures can program adult hypertension. Postnatal interventions offer a critical window to reverse this developmental programming and prevent related diseases.

Related Experiment Videos

Last Updated: Jun 23, 2026

A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis
06:19

A Rat Model of Mild Intrauterine Hypoperfusion with Microcoil Stenosis

Published on: January 7, 2018

Area of Science:

  • Cardiovascular Physiology
  • Developmental Biology
  • Epidemiology

Background:

  • Growing evidence links early life adverse events to adult-onset diseases.
  • Research is exploring mechanisms of organ dysfunction from perinatal conditions.
  • Focus is on interactions between nutrition, oxidants, and toxins in early life.

Purpose of the Study:

  • To review advances in understanding developmental programming of hypertension.
  • To examine the role of perinatal factors in hypertension development.
  • To explore interactions between prenatal and postnatal influences.

Main Methods:

  • Review of recent epidemiological and mechanistic studies.
  • Analysis of factors influencing renal and vascular function.
  • Investigation of sympathetic nervous system regulation.

Main Results:

  • Oligonephronia, impaired renal function, and altered vascular dynamics are key mechanisms.
  • Prenatal insults differentially modulate hypertension programming (e.g., prematurity vs. intrauterine growth restriction).
  • Perinatal oxidative stress, glucocorticoids, and nutrition are critical factors.

Conclusions:

  • Complexity of antenatal and postnatal influences on adult blood pressure is recognized.
  • Postnatal life presents a window of opportunity to positively modulate developmental programming.
  • Interventions can potentially reverse programming and prevent adult-onset diseases.