3-Dimensional Echocardiographic Prediction of Left Ventricular Outflow Tract Area Prior to Transcatheter Mitral Valve Replacement.

Bartkowiak, Joanna; Dernektsi, Chrisoula; Agarwal, Vratika; Lebehn, Mark A; Williams, Treena A; Brandwein, Russel A; Brugger, Nicolas; Gräni, Christoph; Windecker, Stephan; Vahl, Torsten P; Nazif, Tamim M; George, Isaac; Kodali, Susheel K; Praz, Fabien; Hahn, Rebecca T (2024). 3-Dimensional Echocardiographic Prediction of Left Ventricular Outflow Tract Area Prior to Transcatheter Mitral Valve Replacement. (In Press). JACC. Cardiovascular imaging Elsevier 10.1016/j.jcmg.2024.05.011

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BACKGROUND

New postprocessing software facilitates 3-dimensional (3D) echocardiographic determination of mitral annular (MA) and neo-left ventricular outflow tract (neo-LVOT) dimensions in patients undergoing transcatheter mitral valve replacement (TMVR).

OBJECTIVES

This study aims to test the accuracy of 3D echocardiographic analysis as compared to baseline computed tomography (CT).

METHODS

A total of 105 consecutive patients who underwent TMVR at 2 tertiary care centers between October 2017 and May 2023 were retrospectively included. A virtual valve was projected in both baseline CT and 3D transesophageal echocardiography (TEE) using dedicated software. MA dimensions were measured in baseline images and neo-LVOT dimensions were measured in baseline and postprocedural images. All measurements were compared to baseline CT as a reference. The predicted neo-LVOT area was correlated with postprocedural peak LVOT gradients.

RESULTS

There was no significant bias in baseline neo-LVOT prediction between both imaging modalities. TEE significantly underestimated MA area, perimeter, and medial-lateral dimension compared to CT. Both modalities significantly underestimated the actual neo-LVOT area (mean bias pre/post TEE: 25.6 mm2, limit of agreement: -92.2 mm2 to 143.3 mm2; P < 0.001; mean bias pre/post CT: 28.3 mm2, limit of agreement: -65.8 mm2 to 122.4 mm2; P = 0.046), driven by neo-LVOT underestimation in the group treated with dedicated mitral valve bioprosthesis. Both CT- and TEE-predicted-neo-LVOT areas exhibited an inverse correlation with postprocedural LVOT gradients (r2 = 0.481; P < 0.001 for TEE and r2 = 0.401; P < 0.001 for CT).

CONCLUSIONS

TEE-derived analysis provides comparable results with CT-derived metrics in predicting the neo-LVOT area and peak gradient after TMVR.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiology

Graduate School:

Graduate School for Health Sciences (GHS)

UniBE Contributor:

Dernektsi, Chrisoula, Brugger, Nicolas Jacques, Gräni, Christoph, Windecker, Stephan, Praz, Fabien Daniel

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1876-7591

Publisher:

Elsevier

Language:

English

Submitter:

Pubmed Import

Date Deposited:

29 Jul 2024 09:37

Last Modified:

29 Jul 2024 09:46

Publisher DOI:

10.1016/j.jcmg.2024.05.011

PubMed ID:

39066744

Uncontrolled Keywords:

computed tomography echocardiography left ventricular outflow tract obstruction mitral valve replacement neo–left ventricular outflow tract

BORIS DOI:

10.48350/199348

URI:

https://boris.unibe.ch/id/eprint/199348

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