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Related Concept Videos

Cardiac Catheterization II: Right Heart Catheterization01:21

Cardiac Catheterization II: Right Heart Catheterization

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Right Heart Catheterization: An OverviewRight heart catheterization is an invasive diagnostic procedure that measures right-sided cardiac and pulmonary artery pressures, calculates cardiac output, and identifies intracardiac shunts. It provides detailed hemodynamic data essential for diagnosing and managing various cardiovascular conditions, such as pulmonary hypertension.Access SitesCommon access sites for right heart catheterization include the internal jugular vein in the neck region, the...
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Pressure Relationships in Thoracic Cavity01:24

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Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs...
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Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care01:29

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Diagnosing Pulmonary EmbolismDiagnosing pulmonary embolism (PE) involves clinical assessment and advanced imaging tests. The preferred diagnostic tool is the spiral (helical) CT scan or CT angiography (CTA), which uses intravenous contrast media to visualize the pulmonary vasculature and identify emboli.A ventilation-perfusion (V/Q) scan is an alternative for patients unable to receive contrast media. This scan includes both perfusion and ventilation scanning. Perfusion scanning involves...
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Related Experiment Video

Updated: Sep 10, 2025

Closed Chest Biventricular Pressure-Volume Loop Recordings with Admittance Catheters in a Porcine Model
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An Integrated Pressure-Volume Loop and Pulmonary Artery Catheter.

M Imran Aslam1, Aleksandra B Gruslova2, Luis A Diaz Sanmartin2

  • 1Division of Cardiology, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA.

JACC. Basic to Translational Science
|August 26, 2025
PubMed
Summary

A novel admittance technology (AT) pulmonary artery catheter accurately measures right ventricular (RV) pressure-volume loops. This validated tool precisely tracks RV volumes, crucial for assessing cardiac function and injury.

Keywords:
RV volumeadmittancepressure-volume loopspulmonary artery catheter

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Area of Science:

  • Cardiovascular physiology
  • Medical device engineering
  • Diagnostic technology

Background:

  • Accurate measurement of right ventricular (RV) function is critical in clinical cardiology.
  • Existing methods for assessing RV pressure-volume loops can be invasive or limited in real-time application.

Purpose of the Study:

  • To develop and validate an admittance technology (AT) pulmonary artery catheter for instantaneous RV pressure-volume loop measurement.
  • To assess the accuracy of AT-derived RV volumes against established imaging and physical methods.

Main Methods:

  • Development of an AT pulmonary artery catheter.
  • In vivo validation in 10 swine undergoing hemodynamic changes.
  • Comparison with magnetic resonance imaging (MRI) and ex vivo RV foam casts.
  • Finite element analysis to confirm electric field confinement.

Main Results:

  • AT-derived RV volumes showed strong correlation with MRI and foam cast measurements (P = NS).
  • The catheter accurately reflected hemodynamic perturbations, demonstrating anticipated pressure-volume loop changes.
  • Significant detection of increasing RV end-diastolic volumes during acute cardiac injury (P < 0.001).

Conclusions:

  • The AT pulmonary artery catheter provides a validated method for measuring instantaneous RV pressure-volume loops.
  • This technology offers a promising tool for real-time assessment of RV function and response to injury.