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Fractal Analysis of Right Ventricular Trabeculae in Pulmonary Hypertension.
Dawes, Timothy J W; Cai, Jiashen; Quinlan, Marina; de Marvao, Antonio; Ostrowski, Philip J; Tokarczuk, Pawel F; Watson, Geoffrey M J; Wharton, John; Howard, Luke S G E; Gibbs, J Simon R; Cook, Stuart A; Wilkins, Martin R; O'Regan, Declan P.
Afiliação
  • Dawes TJW; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Cai J; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Quinlan M; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • de Marvao A; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Ostrowski PJ; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Tokarczuk PF; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Watson GMJ; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Wharton J; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Howard LSGE; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Gibbs JSR; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Cook SA; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • Wilkins MR; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
  • O'Regan DP; From the MRC London Institute of Medical Sciences, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Rd, London W12 0HS, England (T.J.W.D., M.Q., A.d.M., P.J.O., P.F.T., S.A.C., D.P.O.); National Heart and Lung Institute (T.J.W.D., J.S.R.G., S.A.C.), and Division of
Radiology ; 288(2): 386-395, 2018 08.
Article em En | MEDLINE | ID: mdl-29869959
ABSTRACT
Purpose To measure right ventricular (RV) trabecular complexity by its fractal dimension (FD) in healthy subjects and patients with pulmonary hypertension (PH) and to assess its relationship with hemodynamic and functional parameters and future cardiovascular events. Materials and Methods This retrospective study used data acquired from May 2004 to October 2013 in 256 patients with newly diagnosed PH who underwent cardiac MRI, right-sided heart catheterization, and 6-minute walk distance testing, with median follow-up of 4.0 years. A total of 256 healthy control subjects underwent cardiac MRI only. Biventricular FD, volumes, and function were assessed on short-axis cine images. Reproducibility was assessed with the intraclass correlation coefficient, correlation between variables was assessed with the Pearson correlation test, and mortality prediction was compared by using uni- and multivariable Cox regression analyses. Results RV FD reproducibility had an intraclass correlation coefficient of 0.97 (95% confidence interval [CI] 0.96, 0.98). RV FD was higher in patients with PH (median, 1.310; interquartile range [IQR], 1.281-1.341) than in healthy subjects (median, 1.264; IQR, 1.242-1.295; P < .001), with the greatest difference near the apex. RV FD was associated with pulmonary vascular resistance (r = 0.30, P < .001). At univariable Cox regression analysis, RV FD was a significant predictor of death (hazard ratio [HR], 1.256; 95% CI 1.011, 1.560; P = .04); however, at multivariable analysis, RV FD did not enable prediction of survival independently of conventional parameters of RV remodeling (HR, 1.179; 95% CI 0.871, 1.596; P = .29). Conclusion Fractal analysis of RV trabecular complexity is a highly reproducible measure of remodeling in patients with PH that is associated with afterload, although the gain in survival prediction over traditional markers is not significant. Published under a CC BY 4.0 license. Online supplemental material is available for this article.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Imageamento por Ressonância Magnética / Fractais / Disfunção Ventricular Direita / Hipertensão Pulmonar Idioma: En Ano de publicação: 2018 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Imageamento por Ressonância Magnética / Fractais / Disfunção Ventricular Direita / Hipertensão Pulmonar Idioma: En Ano de publicação: 2018 Tipo de documento: Article