The predictive role of combined cardiac and lung ultrasound in Coronavirus Disease 2019

Link to article at PubMed

J Am Soc Echocardiogr. 2021 Feb 8:S0894-7317(21)00070-5. doi: 10.1016/j.echo.2021.02.003. Online ahead of print.

ABSTRACT

BACKGROUND AND OBJECTIVES: We aimed to evaluate sonographic features that may aid in risk stratification and propose a focused cardiac and lung ultrasound (LUS) algorithm in patients with COVID-19 METHODS: Two hundred consecutive hospitalized patients with COVID-19 underwent comprehensive clinical and echocardiographic examination, as well as LUS, irrespective of clinical indication, within 24 hours of admission as part of a prospective predefined protocol. Assessment included calculation of the Modified Early Warning Score (MEWS), left ventricular (LV) systolic and diastolic function, hemodynamic and right ventricular (RV) assessment and a calculated LUS score. We performed outcome analysis to identify echocardiographic and LUS predictors of mortality or the composite event of mortality or need for invasive mechanical ventilation, and to assess their adjunctive value on top of clinical parameters and MEWS.

RESULTS: A simplified echocardiographic risk score comprised of LV ejection fraction< 50% combined with TAPSE< 18 mm, was associated with mortality (p=0.0002) and with the composite event (p=0.0001). Stepwise analyses evaluating echocardiographic and LUS parameters on top of existing clinical risk scores showed that addition of TAPSE and SVI improved prediction of mortality when added to clinical variables but not when added to MEWS. Once echocardiography was added, and patients re-categorized as high risk only if having both high risk MEWS, and high-risk cardiac features, the specificity increased from 63% to 87%, positive predictive value from 28% to 48% and accuracy improved from 66% to 85%. Although LUS was not associated with incremental risk prediction for mortality above clinical and echocardiographic criteria, it improved prediction of need for invasive mechanical ventilation.

CONCLUSIONS: In hospitalized patients with COVID-19, a very limited echocardiographic exam is sufficient for outcome prediction. The addition of echocardiography in patients with high risk MEWS score decreases the rate of falsely identifying patients as high risk to die, and may improve resource allocation in case of high patient load.

PMID:33571647 | PMC:PMC7870445 | DOI:10.1016/j.echo.2021.02.003

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