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Related Concept Videos

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

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The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
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Antihypertensive Drugs: Direct Renin Inhibitors01:25

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The renin-angiotensin-aldosterone system (RAAS) is an intricate physiological pathway involving numerous enzymes and hormones, including renin, angiotensin-converting enzyme (ACE), angiotensin I and II, and aldosterone. Imbalances within this system increase the production of angiotensin II and aldosterone. Increased angiotensin II levels promote vasoconstriction and blood pressure elevation. Concurrently, higher aldosterone levels stimulate sodium and water reabsorption in the kidneys,...
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Antihypertensive Drugs: Angiotensin II Receptor Blockers01:30

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In the renin-angiotensin-aldosterone system, a hormone called angiotensin II plays a crucial role. It binds to the AT1 receptors in vascular smooth muscles coupled with Gq proteins. The activation of these receptors activates an enzyme called phospholipase C, which releases two molecules: inositol trisphosphate and diacylglycerol. These molecules cause a chain reaction that leads to the phosphorylation of myosin light chains and promotes interaction between actin and myosin, leading to smooth...
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Antihypertensive Drugs: Vasodilators01:23

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Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
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Heart failure and kidney perfusion are interconnected in a complex way. Reduced renal perfusion and venous congestion are two significant factors that contribute to renal dysfunction in heart failure. The kidneys, primarily responsible for fluid balance in the body, are adversely affected due to compromised cardiac output and increased venous pressure. In response to reduced renal perfusion, the kidneys activate neurohumoral mechanisms to restore balance. However, these mechanisms can be...
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Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
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Related Experiment Video

Updated: Apr 17, 2026

Improved Renal Denervation Mitigated Hypertension Induced by Angiotensin II Infusion
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Renal denervation for resistant hypertension.

Manuel de Sousa Almeida1, Pedro de Araújo Gonçalves2, Eduardo Infante de Oliveira3

  • 1Serviço de Cardiologia, Hospital de Santa Cruz - CHLO, Carnaxide, Portugal.

Revista Portuguesa De Cardiologia : Orgao Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
|February 10, 2015
PubMed
Summary

Drug-resistant hypertension is common, with chronic sympathetic overactivity playing a key role. Renal denervation offers a new treatment option for resistant hypertension by targeting sympathetic nerves, with potential for other cardiovascular diseases.

Keywords:
Desnervação renalHipertensão arterialHypertensionRenal denervationSistema nervoso simpáticoSympathetic nervous system

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Area of Science:

  • Cardiovascular Medicine
  • Nephrology
  • Medical Devices

Background:

  • Hypertension prevalence is high, yet control rates remain low.
  • Drug-resistant hypertension affects a subset of patients with uncontrolled blood pressure.
  • Chronic sympathetic nervous system hyperactivation is implicated in resistant hypertension pathophysiology.

Purpose of the Study:

  • To review pathophysiological mechanisms linking the sympathetic nervous system and cardiovascular disease.
  • To focus on the role of sympathetic renal denervation in resistant hypertension.
  • To provide an update on experimental and clinical results of renal denervation.

Main Methods:

  • Literature review of pathophysiological mechanisms.
  • Analysis of experimental and clinical data on renal denervation.
  • Exploration of potential future applications of renal denervation.

Main Results:

  • Sympathetic hyperactivation is a key factor in resistant hypertension.
  • Renal denervation is an emerging device-based treatment for resistant hypertension.
  • Evidence supports the role of renal denervation in managing resistant hypertension.

Conclusions:

  • Sympathetic renal denervation is a promising treatment for resistant hypertension.
  • Further research may expand its use to other cardiovascular diseases.
  • Understanding sympathetic nervous system involvement is crucial for cardiovascular disease management.