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Related Concept Videos

Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists01:18

Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists

Endothelins (ETs) are potent vasoactive peptides critical in the human body's various physiological and pathological processes. One of the most promising therapeutic strategies for treating pulmonary arterial hypertension (PAH) involves counteracting the effects of these endothelins using a class of drugs known as endothelin receptor antagonists.
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme (ECE). Of...
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...
Treatment for Pulmonary Arterial Hypertension: Receptor Tyrosine Kinase Inhibitors and Calcium Channel Blockers01:26

Treatment for Pulmonary Arterial Hypertension: Receptor Tyrosine Kinase Inhibitors and Calcium Channel Blockers

Receptor tyrosine kinase inhibitors (TKIs) and calcium channel blockers (CCBs) are two critical categories of drugs employed in the treatment of pulmonary artery hypertension (PAH). PAH is a disease that causes high blood pressure in the pulmonary arteries, resulting in chest pain, fatigue, and shortness of breath.
TKIs, such as imatinib (Gleevec), are particularly effective in tackling the growth and mitogenic factors that become upregulated in PAH patients. These factors contribute to the...
Portal Hypertension01:22

Portal Hypertension

Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...
Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess the...
Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...

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Related Experiment Video

Updated: Jul 3, 2026

The Antihypertensive Effects and Mechanisms of Huotan Jiedu Tongluo Decoction in Rats with H-Type Hypertension
05:57

The Antihypertensive Effects and Mechanisms of Huotan Jiedu Tongluo Decoction in Rats with H-Type Hypertension

Published on: May 17, 2024

Secondary hypertension: interfering substances.

Ehud Grossman1, Franz H Messerli

  • 1Internal Medicine Dept. and Hypertension Unit, The Chaim Sheba Medical Center, Tel-Hashomer, Israel. gross-e@zahav.net.il

Journal of Clinical Hypertension (Greenwich, Conn.)
|July 9, 2008
PubMed
Summary
This summary is machine-generated.

Certain medications can unexpectedly raise blood pressure, sometimes interfering with hypertension treatments. Reviewing drug regimens is crucial for identifying chemically induced hypertension and guiding effective therapy.

Related Experiment Videos

Last Updated: Jul 3, 2026

The Antihypertensive Effects and Mechanisms of Huotan Jiedu Tongluo Decoction in Rats with H-Type Hypertension
05:57

The Antihypertensive Effects and Mechanisms of Huotan Jiedu Tongluo Decoction in Rats with H-Type Hypertension

Published on: May 17, 2024

Area of Science:

  • Pharmacology
  • Cardiovascular Medicine
  • Toxicology

Background:

  • Numerous therapeutic agents and chemical substances can elevate blood pressure.
  • These substances may transiently or persistently increase blood pressure or counteract antihypertensive medications.
  • Mechanisms include sodium retention, sympathetic nervous system activation, direct vascular effects, or unknown pathways.

Purpose of the Study:

  • To review therapeutic agents and chemical substances that elevate blood pressure.
  • To elucidate the mechanisms of action for these blood pressure-elevating substances.
  • To highlight the clinical significance of drug-induced hypertension.

Main Methods:

  • Literature review of studies on drug-induced hypertension.
  • Analysis of pharmacological mechanisms by which substances affect blood pressure.
  • Summary of clinical presentations and consequences of chemically induced hypertension.

Main Results:

  • Identified agents that cause sodium retention, sympathetic activation, direct arteriolar effects, or have undefined mechanisms.
  • Noted that some antihypertensive drugs can paradoxically increase blood pressure, even after discontinuation.
  • Reported severe outcomes including encephalopathy, stroke, and renal failure.

Conclusions:

  • Chemically induced hypertension is a significant clinical concern.
  • Careful evaluation of patient medication is essential for diagnosis and management.
  • Identifying causative agents can prevent unnecessary investigations and guide appropriate antihypertensive therapy.