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Related Concept Videos

Mitral Stenosis I: Introduction01:22

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Related Experiment Video

Updated: Aug 28, 2025

Assessment of Right Ventricular Structure and Function in Mouse Model of Pulmonary Artery Constriction by Transthoracic Echocardiography
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Pulmonary artery wave reflection and right ventricular function after lung resection.

Adam Glass1, Philip McCall2, Alex Arthur3

  • 1Academic Unit of Anaesthesia, Pain and Critical Care, University of Glasgow, Glasgow, UK; School of Anaesthesia, Northern Ireland Medical and Dental Training Agency, Belfast, UK.

British Journal of Anaesthesia
|September 17, 2022
PubMed
Summary

Lung resection increases pulsatile afterload and diverts blood flow, leading to right ventricular dysfunction. This study used cardiovascular MRI to assess these changes after lobectomy.

Keywords:
afterloadcardiovascular magnetic resonance imaginglobectomylung resectionright ventriclestrainwave intensity analysis

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Area of Science:

  • Cardiovascular Physiology
  • Thoracic Surgery
  • Diagnostic Imaging

Background:

  • Lung resection, such as lobectomy, can negatively impact right ventricular function.
  • Surgical ligation of pulmonary artery branches alters hemodynamics, increasing wave reflection and redirecting blood flow.
  • Cardiovascular magnetic resonance imaging (MRI) is used to study these post-surgical changes.

Purpose of the Study:

  • To investigate the effects of lung resection on pulmonary artery wave reflection and right ventricular function.
  • To assess changes in hemodynamics and blood flow distribution after lobectomy using cardiovascular MRI.
  • To correlate alterations in wave reflection and blood flow with right ventricular dysfunction.

Main Methods:

  • A cohort of 27 patients undergoing lobectomy for lung cancer were studied using cardiovascular MRI.
  • Preoperative, early (postoperative Day 2), and late (2 months) assessments were performed.
  • Wave reflection, pulmonary artery blood flow distribution, and right ventricular function (ejection fraction, strain) were analyzed.

Main Results:

  • Pulmonary artery wave reflection significantly increased post-lobectomy, with associated blood flow redistribution towards the non-operative artery.
  • Early postoperative right ventricular dysfunction correlated with increased wave reflection and blood flow redistribution.
  • Late-stage right ventricular dysfunction (ejection fraction and strain) was associated with persistent blood flow redistribution.

Conclusions:

  • Lung resection leads to increased pulsatile afterload due to enhanced pulmonary artery wave reflection.
  • This hemodynamic shift causes blood flow redistribution and is linked to right ventricular dysfunction.
  • Cardiovascular MRI effectively quantifies these post-surgical hemodynamic and functional changes.