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Related Concept Videos

Pulmonary Hypertension: Classification and Pathogenesis01:30

Pulmonary Hypertension: Classification and Pathogenesis

664
Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...
664
Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors01:28

Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors

619
Phosphodiesterase 5 (PDE5) inhibitors are potent enzymes that function to hydrolyze cyclic nucleotides to their corresponding 5' monophosphates. Their unique biochemical properties have been applied in treating Pulmonary Arterial Hypertension (PAH).
Among the PDE5 inhibitors, sildenafil (Revatio) stands out as a competitive and selective inhibitor. It operates by elevating cellular levels of cGMP and augmenting signaling through the cGMP-PKG pathway, promoting vasodilation. Upon oral...
619
Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists01:18

Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists

479
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...
479
Treatment for Pulmonary Arterial Hypertension: Prostacyclin Receptor Agonists01:23

Treatment for Pulmonary Arterial Hypertension: Prostacyclin Receptor Agonists

513
Prostacyclin receptor agonists are a class of therapeutic agents integral to managing pulmonary arterial hypertension (PAH). These drugs operate by mimicking the action of prostaglandin I2, or PGI2, a naturally occurring compound in the body.
These agonists bind to the IPR receptor situated on the plasma membrane of the pulmonary artery smooth muscle cells. This binding triggers a cascade of reactions known as the GS-AC-cAMP-PKA pathway. This pathway results in the relaxation of smooth muscle...
513
Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure01:16

Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure

633
Oxygen therapy has emerged as a significant tool in enhancing the quality of life for patients suffering from pulmonary arterial hypertension (PAH). While this therapy has principally been studied on patients with significant hypoxemia, this therapeutic approach helps prevent potential organ damage and can be administered in the comfort of one's home.
Oxygen therapy is vital in increasing and maintaining blood oxygen levels in PAH patients. As a result, it aids in reducing fatigue,...
633
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

553
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...
553

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Related Experiment Video

Updated: Feb 9, 2026

Evaluation of Right Ventricular Function in Experimental Models of Pulmonary Arterial Hypertension
10:03

Evaluation of Right Ventricular Function in Experimental Models of Pulmonary Arterial Hypertension

Published on: June 27, 2025

801

Pulmonary hypertension.

Sanjiv J Shah1

  • 1Division of Cardiology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA. sanjiv.shah@northwestern.edu

JAMA
|October 4, 2012
PubMed
Summary
This summary is machine-generated.

Pulmonary hypertension (PH) requires careful diagnosis, differentiating it from pulmonary arterial hypertension (PAH). Effective management involves understanding echocardiography, invasive testing, and tailored treatment strategies for better patient outcomes.

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Area of Science:

  • Cardiology
  • Pulmonology
  • Medical Diagnostics

Background:

  • Pulmonary hypertension (PH), characterized by elevated pulmonary artery pressure, is prevalent and linked to increased mortality.
  • Physicians frequently see patients with symptoms like dyspnea and right heart failure, often showing elevated pulmonary artery systolic pressure (PASP) on echocardiography.
  • Pulmonary arterial vasodilators are typically tested in pulmonary arterial hypertension (PAH) patients, but elevated PASP alone doesn't confirm PAH.

Observation:

  • Elevated PASP alone does not confirm pulmonary arterial hypertension (PAH); secondary causes, particularly left heart disease, are more common.
  • Pulmonary vasodilator therapies, tested mainly in PAH, may worsen symptoms in patients with PH due to left heart disease.

Findings:

  • Accurate PH diagnosis necessitates optimal echocardiography use and interpretation of invasive hemodynamic testing.
  • Distinguishing PAH from pulmonary venous hypertension secondary to left heart disease is critical for appropriate management.

Implications:

  • Effective PH management requires differentiating its causes and understanding evidence-based treatment strategies.
  • Improving patient outcomes involves precise diagnosis, appropriate vasodilator use, and tailored therapies for PH and associated right heart failure.