title: Correlation of right ventricular dysfunction parameters and pulmonary vascular obstruction score in acute pulmonary embolism in a porcine model.
abstract: This paper aims to non-invasively determine right ventricular dysfunction parameters (RVDP) in acute pulmonary embolism (APE) and to correlate these parameters with a computed tomography (CT)-based pulmonary artery obstruction score (OS). In seven domestic pigs, magnetic resonance imaging (MRI) was performed before (n = 7) and after (n = 5) APE was induced. Analysis of relative changes in right ventricular stroke volume (RVSV%), output (RVO%), end-systolic (RVESV%), end-diastolic volume (RVEDV%), and heart rate (HR%) was performed. Additionally, for the determination of the OS, all animals underwent contrast-enhanced CT-pulmonary angiography. The CT-based OS correlated strongly with RVSV% (r = 0.9576; p = 0.0104) and RVO% (r = 0.9703; p = 0.0061). Contrarily, almost no correlation could be demonstrated for the OS and the increase of RVESV % (r = 0.3850; p = 0.5222), RVEDV% (r = 0.1830; p = 0.7683), and HR% (r = 0.5494; p = 0.3375). The results of this experimental study underline that the CT-based OS correlates with RVDP as determined by cardiac MRI and might be a helpful tool for the severity assessment in APE.
authors.affiliation: Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany. groth.michael@googlemail.com
authors.forename: Michael
authors.initials: M
authors.lastname: Groth
authors.forename: Frank O
authors.initials: FO
authors.lastname: Henes
authors.forename: Kai
authors.initials: K
authors.lastname: Müllerleile
authors.forename: Gerhard
authors.initials: G
authors.lastname: Adam
authors.forename: Philipp G C
authors.initials: PG
authors.lastname: Begemann
authors.forename: Marc
authors.initials: M
authors.lastname: Regier
mesh_terms: D000818:Animals; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging / Q000473:pathology; D004195:Disease Models, Animal; D018810:Magnetic Resonance Angiography; D008297:Male; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000209:etiology*; D011859:Radiography; D012107:Research Design; D013552:Swine; D015898:Tomography Scanners, X-Ray Computed / Q000639:trends; D018497:Ventricular Dysfunction, Right / Q000000981:diagnostic imaging / Q000473:pathology