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Related Concept Videos

Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure01:16

Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure

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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,...
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Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors01:28

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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...
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Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists01:18

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

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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.
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Special considerations while measuring oxygen saturation01:19

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Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
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Pulmonary Hypertension: Classification and Pathogenesis01:30

Pulmonary Hypertension: Classification and Pathogenesis

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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.
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Decrease in Cerebral Oxygen Saturation During the 6-Minute Walk Test in Pediatric Pulmonary Arterial Hypertension.

Leman Tekin Orgun1,2, Zeynep Öztürk3, Fatma Hayvacı Canbeyli4

  • 1Department of Pediatric Neurology, Gazi University Faculty of Medicine, Ankara, Turkey. lemantekin15@yahoo.com.

Pediatric Cardiology
|August 2, 2019
PubMed
Summary

Regional cerebral oxygenation (rSO2) significantly decreases in pediatric pulmonary arterial hypertension (PAH) patients during the 6-minute walk test (6-MWT). Monitoring rSO2 with 6-MWT may improve exercise capacity assessment in PAH.

Keywords:
Cerebral oxygen saturationChildrenNear-infrared spectroscopyPulmonary arterial hypertensionSix-minute walk test

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Area of Science:

  • Pediatric Cardiology
  • Pulmonary Hypertension Research
  • Cerebral Hemodynamics

Background:

  • Pulmonary arterial hypertension (PAH) significantly impacts pediatric patients' exercise capacity and daily activities.
  • Assessing exercise tolerance in pediatric PAH is crucial for management and prognosis.
  • Cerebral oxygenation changes during exertion in pediatric PAH are not well understood.

Purpose of the Study:

  • To investigate the relationship between regional cerebral oxygen saturation (rSO2) during the 6-minute walk test (6-MWT) and demographic/clinical features in pediatric PAH patients.
  • To evaluate cerebral oxygenation dynamics during standardized exercise in this population.
  • To explore the potential of combined rSO2 monitoring and 6-MWT for enhanced predictive value.

Main Methods:

  • Observational study involving 20 pediatric PAH patients (age ≥ 7 years).
  • Near-infrared spectroscopy (NIRS) used to measure rSO2, SpO2, and heart rate (HR) before, during, and after the 6-MWT.
  • Statistical comparison of rSO2, SpO2, and HR changes with clinical and laboratory parameters.

Main Results:

  • A significant decrease in rSO2 was observed in pediatric PAH patients during the 6-MWT.
  • 70% of patients experienced a >10% decrease in rSO2 from baseline.
  • Eight patients showed reduced rSO2 without concurrent SpO2 decline, suggesting potential cerebral autoregulation changes.

Conclusions:

  • Pediatric patients with PAH exhibit reduced cerebral oxygenation during the 6-MWT.
  • Combining 6-MWT with rSO2 monitoring may offer more precise predictive values for exercise capacity than 6-MWT alone.
  • This approach could enhance the evaluation of functional status and daily activity limitations in pediatric PAH.