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Low concordance between CTPA and echocardiography in identification of right ventricular strain in PERT patients with acute pulmonary embolism

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Abstract

Purpose

Right ventricular strain (RVS) is used to risk stratify patients with acute pulmonary embolism (PE) and influence treatment decisions. Guidelines suggest that either computed tomography pulmonary angiography (CTPA) or transthoracic echocardiography (TTE) can be used to assess RVS. We sought to determine how often CTPA and TTE yield discordant results and to assess the test characteristics of CTPA compared to TTE.

Methods

We analyzed data from a single-center registry of PE cases severe enough to warrant activation of the hospital’s Pulmonary Embolism Response Team (PERT). We defined RVS as a right ventricular to left ventricular ratio (RV/LV) ≥ 1 or radiologist’s interpretation of RVS on CTPA or as the presence of either RV dilation, hypokinesis, or septal bowing on TTE.

Results

We included 554 patients in our analysis, of whom 333 (60%) had concordant RVS findings on CTPA and TTE. Using TTE as the reference standard, CTPA had a sensitivity of 95% (95% CI 92–97%) and a specificity of 4% (95% CI 2–8%) for identifying RVS.

Conclusions

In a selected population of patients with acute PE for which PERT was activated, CTPA is highly sensitive but not specific for the detection of RVS when compared to TTE.

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Data Availability

Data is available upon reasonable request.

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Authors

Contributions

Authors Mads Dam Lyhne, Nick Giordano, David Dudzinski, and Christopher Kabrhel contributed to study conception and design. Data collection and analysis were performed by Nick Giordano, Blair Alden Parry, Jasmine Torey, Grace Wang, and Hui Zheng. All authors contributed to interpretation of data. The first draft of the manuscript was written by Mads Dam Lyhne and Nick Giordano. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Christopher Kabrhel.

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Ethical approval was waived by the Mass General Brigham (MGB) Institutional Review Board (previously known as Partners Human Research Committee, protocol # 2016P000179) in view of the retrospective nature of the study and all the procedures being performed were part of the routine care.

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The authors declare that they have no conflict of interest.

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Lyhne, M.D., Giordano, N., Dudzinski, D. et al. Low concordance between CTPA and echocardiography in identification of right ventricular strain in PERT patients with acute pulmonary embolism. Emerg Radiol 30, 325–331 (2023). https://doi.org/10.1007/s10140-023-02130-z

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  • DOI: https://doi.org/10.1007/s10140-023-02130-z

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