Quantitative assessment of tricuspid regurgitation using right and left ventricular stroke volumes obtained from tomographic equilibrium radionuclide ventriculography
Quantitative assessment of valve regurgitation using volumetric method by comparing right and left ventricular stroke volumes is still under investigations.
To investigate the accuracy of tomographic equilibrium radionuclide ventriculography (t-ERV) for the quantification of tricuspid regurgitation (TR).
Methods and Results
Sixty-one patients (44 men; mean age 59 ± 12 years) who underwent both t-ERV and transthoracic echocardiography (TTE) studies within 2 weeks for right ventricular systolic function assessment were eligible for inclusion. A sub-group of 22 patients underwent both t-ERV and CMR. Patients with mitral/aortic regurgitation by TTE were excluded of the study. TR regurgitant volume (RVol) was calculated using the proximal isovelocity surface area (PISA) method from TTE and the volumetric method (right ventricular stroke volume minus left ventricular stroke volume) from t-ERV. There was a significant correlation between RVol as assess by ERV and by TTE (R = 0.95, P < 0.0001). Intraclass correlation coefficient between TTE and ERV for TR quantification was 0.95 (P < 0.0001). Among patients who underwent CMR, the correlation between RVol obtained by TTE and by t-ERV and CMR were R = 0.81 and R = 0.75, respectively (all P < 0.0001).
TR assessment using the t-ERV correlates well with PISA from TTE in patients referred for right ventricular systolic function assessment.
KeywordsTricuspid regurgitation quantitative assessment radionuclide equilibrium ventriculography transthoracic echocardiography
Intraclass correlation coefficient
Cardiac magnetic resonance imaging
Proximal isovelocity surface area
Tomographic equilibrium radionuclide ventriculography
Damien Eyharts, Yoan Lavie-Badie, Stéphanie Cazalbou, Pauline Fournier, Eve Cariou, Pierre Pascal, Francisco Campelo-Parada, Bertrand Marcheix, Michel Galinier, Isabelle Berry, Didier Carrié, and Olivier Lairez have nothing to disclose.
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