Diagnostic accuracy of cardiovascular magnetic resonance imaging of right ventricular morphology and function in the ass
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RESEARCH
Open Access
Diagnostic accuracy of cardiovascular magnetic resonance imaging of right ventricular morphology and function in the assessment of suspected pulmonary hypertension results from the ASPIRE registry Andrew J Swift1,2,4*, Smitha Rajaram2, Robin Condliffe1,3, Dave Capener2, Judith Hurdman3, Charlie A Elliot1,3, Jim M Wild1,2 and David G Kiely1,3
Abstract Background: Cardiovascular Magnetic Resonance (CMR) imaging is accurate and reproducible for the assessment of right ventricular (RV) morphology and function. However, the diagnostic accuracy of CMR derived RV measurements for the detection of pulmonary hypertension (PH) in the assessment of patients with suspected PH in the clinic setting is not well described. Methods: We retrospectively studied 233 consecutive treatment naïve patients with suspected PH including 39 patients with no PH who underwent CMR and right heart catheterisation (RHC) within 48hours. The diagnostic accuracy of multiple CMR measurements for the detection of mPAP ≥ 25 mmHg was assessed using Fisher’s exact test and receiver operating characteristic (ROC) analysis. Results: Ventricular mass index (VMI) was the CMR measurement with the strongest correlation with mPAP (r = 0.78) and the highest diagnostic accuracy for the detection of PH (area under the ROC curve of 0.91) compared to an ROC of 0.88 for echocardiography calculated mPAP. Late gadolinium enhancement, VMI ≥ 0.4, retrograde flow ≥ 0.3 L/min/m2 and PA relative area change ≤ 15% predicted the presence of PH with a high degree of diagnostic certainty with a positive predictive value of 98%, 97%, 95% and 94% respectively. No single CMR parameter could confidently exclude the presence of PH. Conclusion: CMR is a useful alternative to echocardiography in the evaluation of suspected PH. This study supports a role for the routine measurement of ventricular mass index, late gadolinium enhancement and the use of phase contrast imaging in addition to right heart functional indices in patients undergoing diagnostic CMR evaluation for suspected pulmonary hypertension. Keywords: Pulmonary hypertension, Cardiovascular magnetic resonance, Ventricular mass index, Late gadolinium enhancement, Left heart disease, Pulmonary arterial hypertension, Right ventricle
* Correspondence: [email protected] 1 National Institute of Health Research, Cardiovascular Biomedical Research Unit, Sheffield, UK 2 Unit of Academic Radiology, University of Sheffield, Sheffield, UK Full list of author information is available at the end of the article © 2012 Swift et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Swift et al. Journal of Cardiovascular Magnetic Resonance 2012, 14:40 http://www.jcmr-online.com/content/14/1/40
Background Pulmonary Hypertension (PH) is defined as a mean pulmonary a
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