| Noninvasive estimation of pulmonary vascular resistance in pulmonary hypertension. | |
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MedLine Citation:
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PMID: 19054039 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Determination of pulmonary vascular resistance (PVR) in patients with suspected or known pulmonary hypertension (PH) requires right heart catheterization. Our purpose was to use Doppler echocardiography to estimate PVR in patients with PH. METHODS: Patient population consisted of 52 patients (53 +/- 12 years; 35 females) who underwent Doppler echocardiography and right heart catheterization within 24 hours of each other. The ratio of peak tricuspid regurgitation velocity (TRV) and right ventricular outflow time-velocity integral (VTI(RVOT)) was measured via transthoracic echocardiography and correlated to invasively determined PVR. A linear regression equation was generated to determine PVR by echocardiography based upon the TRV/VTI(RVOT) ratio. PVR by echocardiography was compared to invasive PVR using Bland-Altman analysis. RESULTS: Significant correlation was demonstrated between TRV/VTI(RVOT) and PVR by catheterization (r = 0.73; P < 0.001). However, Bland-Altman analysis showed that agreement between PVR determined by echocardiography and invasive PVR was poor (bias = 0; standard deviation = 4.3 Wood units). In a subset of patients with invasive PVR < 8 Wood units (26 patients), correlation between TRV/VTI(RVOT) and invasive PVR was strong (r = 0.94; P < 0.001). In these patients, agreement between PVR by echocardiography and invasive PVR was satisfactory (bias = 0; standard deviation = 0.5 Wood units). There was no correlation between TRV/VTI(RVOT) and invasive PVR in patients with PVR > 8 Wood units (n = 26; r = 0.17). CONCLUSION: While TRV/VTI(RVOT) correlates significantly with PVR, using it to estimate PVR in a PH patient population cannot be recommended. |
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Authors:
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Navin Rajagopalan; Marc A Simon; Matthew S Suffoletto; Hemal Shah; Kathy Edelman; Michael A Mathier; Angel López-Candales |
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Publication Detail:
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Type: Journal Article Date: 2008-11-24 |
Journal Detail:
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Title: Echocardiography (Mount Kisco, N.Y.) Volume: 26 ISSN: 1540-8175 ISO Abbreviation: Echocardiography Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-05-14 Completed Date: 2009-07-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8511187 Medline TA: Echocardiography Country: United States |
Other Details:
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Languages: eng Pagination: 489-94 Citation Subset: IM |
Affiliation:
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Cardiovascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA. rajagopalann@upmc.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood Flow Velocity Echocardiography, Doppler / methods* Female Humans Hypertension, Pulmonary / physiopathology*, ultrasonography* Male Middle Aged Pulmonary Artery / physiopathology*, ultrasonography* Reproducibility of Results Sensitivity and Specificity Vascular Resistance* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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