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Distance and area measurement of the right atrium and ventricle by echocardiography and cardiac magnetic resonance imaging: do we measure the same thing?
Örebro University, School of Medical Sciences. Örebro University Hospital.
Department of Clinical Physiology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.
Örebro University, School of Health Sciences. Örebro University Hospital. Department of Clinical Physiology, Örebro University Hospital, Örebro, Sweden.ORCID iD: 0000-0002-4262-6373
Örebro University, School of Medical Sciences. Örebro University Hospital. Department of Radiology, Örebro University Hospital, Örebro, Sweden.ORCID iD: 0000-0002-1346-1450
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2016 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Purpose: It has previously been shown that stroke volumes measured by transthoracic echocardiography (TTE) are underestimated, compared to cardiac magnetic resonance (CMR) imaging. The purpose of this study was to evaluate differences in distance and area measurements of the right atrium (RA) and the right ventricle (RV) by TTE and CMR.

Methods: TTE examinations and CMR examinations were subsequently performed in 12 healthy volunteers. Three distances (RAL - right atrial length, RVIT3 - right ventricular inflow tract, RVLAX - right ventricular long axis) and one area (RVA - right ventricular area) were measured in TTE and CMR. Stroke volumes were also calculated using conventional methods available on each modality. Both intramodality and intermodality comparisons were performed based on measurements from three observers. One of the observers performed measurements in both TTE and CMR.

Results: Intermodality comparisons showed that all distance and area measurements were significantly smaller using TTE (Table 1). Two of the measurements, RVIT3 and RVA, differed at about 50%. Calculated stroke volumes showed, consistent with previous results, that the TTE stroke volumes are substantially underestimated compared to CMR volumes. Intramodality variations of distance and area measurements were considerably smaller (Table 1).

Conclusions: Our results show that RV distances and areas measured by TTE are smaller compared to CMR, probably due to differences in defining the endocardial borders. These differences subsequently result in smaller stroke volumes when using TTE. Caution should be taken when comparing distances, areas and volumes measured by TTE and CMR.

Place, publisher, year, edition, pages
Oxford University Press, 2016. p. 214-214, article id P1276
Series
European Heart Journal - Cardiovascular Imaging, ISSN 2047-2404, E-ISSN 2047-2412 ; Vol. 16 (2015): Suppl. 2
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:oru:diva-63463DOI: 10.1093/ehjci/jev270OAI: oai:DiVA.org:oru-63463DiVA, id: diva2:1167918
Conference
19th Annual Meeting of the European Association of Echocardiography, Seville, Spain, December 2-5, 2015
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2018-07-24Bibliographically approved

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Jorstig, StinaWaldenborg, MicaelLidén, MatsThunberg, Per

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School of Medical SciencesÖrebro University HospitalSchool of Health Sciences
Radiology, Nuclear Medicine and Medical Imaging

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