In COVID-19 pneumonia patients, the pulmonary arterial pressure and LUS are positively correlated. For those who are unable to be transferred or relocated, the pulmonary arterial pressure may be measured to reflect the degree of lung lesions indirectly.

Combining these two parameters could improve the accuracy of lung disease progression assessment, providing an important guiding role for treatment decisions.

The pulmonary artery pressure (PAP) on days 3, 8, and 13 of hospitalization was positively correlated with the lung ultrasound score (LUS).

On day 8, the values of both PAP and LUS were higher than on days 3 and 13 (p < 0.01). Similarly, PAP and LUS were significantly increased in 92.9% (39/42) and 90.5% (38/42) of patients, respectively, and at least one of these two values was positive in 97.6% (41/42) of cases. The inner diameters of the right atrium, right ventricle, and pulmonary artery also differed significantly from their corresponding values on days 3 and 13 (p < 0.05).

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