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Calculations of cardiovascular shunts and regurgitation using magnetic resonance ventricular volume and aortic and pulmonary flow measurements

Authors
  • Devos, Daniel G. H.1
  • Kilner, Philip J.2
  • 1 Ghent University Hospital, Department Radiology–MRI (-1K12), De Pintelaan 185, Gent, B-9000, Belgium , Gent (Belgium)
  • 2 Royal Brompton Hospital, Department of Cardiac MRI, Sydney St, London, SW3 6NP, UK , London (United Kingdom)
Type
Published Article
Journal
European Radiology
Publisher
Springer-Verlag
Publication Date
Aug 29, 2009
Volume
20
Issue
2
Pages
410–421
Identifiers
DOI: 10.1007/s00330-009-1568-2
Source
Springer Nature
Keywords
License
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Abstract

Background: Cardiovascular magnetic resonance measurements of the volumes of the right and left ventricle and of the flows in the ascending aorta and main pulmonary artery contribute to the assessment of patients with valvular regurgitation or intracardiac or extracardiac shunts. Ventricular volumes are measured by planimetry and summation of end-diastolic and end-systolic areas measured in a stack of ventricular short-axis cines. The volumes of blood flowing through planes transecting the great arteries are measured using phase contrast velocity mapping. The two approaches are essentially different and can be used either for mutual validation, or separately or in combination to quantify regurgitation and/or shunting. In the presence of shunts, the relations between the stroke volumes and arterial flows of each side of the heart vary depending on the level of shunting (for example, atrial, ventricular or ductal). Conclusion: This article aims to explain and illustrate the technical and theoretical basis for calculations using volumetric and flow measurements, providing formulae and diagrams to facilitate the interpretation of results.

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