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Masters Thesis | Radiology and Medical Imaging Sciences | India | Volume 11 Issue 12, December 2022

Tricuspid Annular Diameter on Routine Chest CT to Detect Significant Tricuspid Regurgitation

Abstract: Introduction: Tricuspid regurgitation (TR) is a relatively common abnormality. Due to its widespread use, CT may offer a new route for initial detection of moderate to severe TR, those who may be potential candidates for tricuspid repair. Aims and objectives: Aim: To assess the ability of tricuspid annular diameter measurements derived from CECT chest in predicting TR seen on echocardiography. Objectives: 1. To measure tricuspid annular diameter on routine noncardiac contrast enhanced chest CT 2.To determine the grade of severity of TR on 2d-ECHO. 3. To correlate CT and 2d- ECHO findings of significant TR. 4. To determine whether CT can be useful in detecting significant TR. Materials and Methods: This is a prospective study conducted in the Department of Radiology, SVIMS, Tirupati during the study period of 18 months from March 2021-June 2022 on consecutive patients referred to the Department of Radiology for CECT chest. Results: A total of 75 individuals were included in the study. The overall prevalence of significant (moderate or severe) TR was 14.6%. Specificity was 96.88% and sensitivity was 72.7%. Positive predictive value was 79.9% and negative predictive value was 95.41%. Summary-Measurement of the diameter of tricuspid valve annulus on regular chest CT can predict moderate to severe TR at a cut point of 40.5 mm. On routine contrast-enhanced CT scans of the chest, the tricuspid annular diameter can be evaluated, and if it is higher than the threshold, additional 2d ECHO evaluation should be advised. Conclusion: This study proposes that routine CECT scans of the chest can be used to quantify tricuspid annular diameter. Further 2D-ECHO testing should be advised when the tricuspid annular diameter is at or above the threshold in order to confirm the diagnosis, grade, and discriminate between the various forms of TR.

Keywords: tricuspid annular dilation, tricuspid annulus, tricuspid regurgitation, tricuspid valve, valve diameter

Edition: Volume 11 Issue 12, December 2022,

Pages: 777 - 784