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• W2059541509 abstract "Background The aim of this study was to assess a novel transthoracic echocardiographic method to estimate the severity of pulmonary regurgitation (PR) in patients with surgically repaired tetralogy of Fallot. Method In 63 patients with operated tetralogy of Fallot, PR was evaluated by vena contracta width, jet deceleration, PR index, pressure half-time, and a new index, referred to as Pulmonary Regurgitation Index by M-mode echocardiography (PRIME), which is the systolic-to-diastolic variation in right pulmonary artery diameter. The results were matched to PR fraction (PRF) assessed by cardiovascular magnetic resonance imaging. PRIME cutoff values for selecting patients with mild, moderate, and severe PR were identified by maximizing PRIME sensitivity and specificity. Nonlinear regression by 3-parameter logistic function was used to estimate PRF by PRIME. Results The sensitivity and specificity of PRIME were high for all diagnostic targets: PRF ≥15% versus <15%, PRF ≥25% versus <25%, and PRF >40% versus ≤40%. The nonlinear regression model showed a good correlation between PRF and PRIME (R2 = 0.95). Conclusion PRIME is a simple and accurate method to estimate PR by transthoracic echocardiography in patients with operated tetralogy of Fallot. The aim of this study was to assess a novel transthoracic echocardiographic method to estimate the severity of pulmonary regurgitation (PR) in patients with surgically repaired tetralogy of Fallot. In 63 patients with operated tetralogy of Fallot, PR was evaluated by vena contracta width, jet deceleration, PR index, pressure half-time, and a new index, referred to as Pulmonary Regurgitation Index by M-mode echocardiography (PRIME), which is the systolic-to-diastolic variation in right pulmonary artery diameter. The results were matched to PR fraction (PRF) assessed by cardiovascular magnetic resonance imaging. PRIME cutoff values for selecting patients with mild, moderate, and severe PR were identified by maximizing PRIME sensitivity and specificity. Nonlinear regression by 3-parameter logistic function was used to estimate PRF by PRIME. The sensitivity and specificity of PRIME were high for all diagnostic targets: PRF ≥15% versus <15%, PRF ≥25% versus <25%, and PRF >40% versus ≤40%. The nonlinear regression model showed a good correlation between PRF and PRIME (R2 = 0.95). PRIME is a simple and accurate method to estimate PR by transthoracic echocardiography in patients with operated tetralogy of Fallot." @default.
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• W2059541509 date "2010-05-01" @default.
• W2059541509 modified "2023-10-06" @default.
• W2059541509 title "A New Simple Method to Estimate Pulmonary Regurgitation by Echocardiography in Operated Fallot: Comparison With Magnetic Resonance Imaging and Performance Test Evaluation" @default.
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• W2059541509 doi "https://doi.org/10.1016/j.echo.2010.01.004" @default.
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