Document Detail

CT pulmonary angiography combined with echocardiography in suspected systemic sclerosis-associated pulmonary arterial hypertension.
MedLine Citation:
PMID:  21447566     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Echocardiography is widely used in the investigation of patients with suspected SSc-associated pulmonary arterial hypertension (SSc-PAH). We investigated whether CT pulmonary angiography (CTPA) provides additive diagnostic value.
METHODS: Data for 89 consecutive patients with suspected SSc-PAH undergoing echocardiography, CTPA and right heart catheterization were reviewed. Pulmonary artery diameter (dPA) and ascending aorta diameter (dAA), right and left ventricular diameter (dRV and dLV) and grade of tricuspid regurgitation (TR(CT)) measured at CTPA and tricuspid gradient (TG(ECHO)) at echocardiography were retrieved. A predictive equation for mean pulmonary arterial pressure (mPAP) was derived using multivariate linear regression. Multivariate Cox regression analysis was then used to assess the prognostic strength of CTPA parameters and TG(ECHO).
RESULTS: Absolute measures of dPA and dRV correlated weakly with mPAP. However, dPA : dAA and dRV : dLV showed stronger correlations with mPAP (dPA : dAA r = 0.42, P < 0.001; dRV : dLV r = 0.51, P < 0.001). dRV : dLV correlated more strongly with pulmonary vascular resistance than did dPA : dAA (r = 0.63 vs 0.39, P both <0.001). dPA : dAA and TG(ECHO) were independent predictors of mPAP. A derived CT/echo composite index had a higher predictive accuracy (area under the curve = 0.95) than dPA : dAA or TG(ECHO) although negative predictive value (NPV) was only 77%. Combining the CT/echo composite index with presence or absence of TR(CT) increased NPV to 100% although this observation requires further validation. dRV : dLV was the strongest prognostic factor.
CONCLUSION: In suspected SSc-PAH, cardiac chamber and great vessel measurements at CTPA correlate with pulmonary haemodynamics and predict survival. In combination with echocardiography CTPA increases diagnostic accuracy and may identify other potential causes of breathlessness.
Robin Condliffe; Mark Radon; Judith Hurdman; Christine Davies; Catherine Hill; Mohammed Akil; Franco Guarasci; Smitha Rajaram; Andrew J Swift; Zena Wragg; Edwin van Beek; Charlie A Elliot; David G Kiely
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Publication Detail:
Type:  Journal Article     Date:  2011-03-29
Journal Detail:
Title:  Rheumatology (Oxford, England)     Volume:  50     ISSN:  1462-0332     ISO Abbreviation:  Rheumatology (Oxford)     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-07-12     Completed Date:  2011-11-28     Revised Date:  2014-07-30    
Medline Journal Info:
Nlm Unique ID:  100883501     Medline TA:  Rheumatology (Oxford)     Country:  England    
Other Details:
Languages:  eng     Pagination:  1480-6     Citation Subset:  AIM; IM    
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MeSH Terms
Angiography / methods
Cardiac Catheterization
Echocardiography / methods*
Hypertension, Pulmonary / complications,  diagnosis*,  physiopathology
Lung / blood supply,  radiography
Pulmonary Artery / pathology*,  physiopathology,  radiography
Scleroderma, Systemic / complications,  diagnosis*,  physiopathology
Tomography, X-Ray Computed / methods*
Grant Support
G0701127//Medical Research Council

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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