Objectives: Evaluation of pulmonary artery pressure in moderate and severe Covid-19 patients. Clinical and subclinical characteristics in moderate and severe Covid-19 patients with or without pulmonary arterial hypertension. Methods: A cross - sectional descriptive study was performed on 200 Covid-19 patients who were treated in the recovery and critical areas of the COVID-19 Intensive care center of Hue Central Hospital in Ho Chi Minh City from August 12, 2021 to November 15, 2021. Results: The mean age in the study group was 57.38 ± 17.62. The time of onset was 6.92 ± 3.9 days. Underechocardiographic assessment, 28 (14%) patients showed an increase of PAP with an average age of 67.04 ± 13.50, which was higher than the group without an increase of PAP of 55.8 ± 17.75 and had comorbidities more often than diabetes (35.7%), hypertension (50%), CVD (6%), and BMI was also higher than 26.02 ± 3.68. The mean increase of PAP was 44.50 ± 8.19 mmHg, TAPSE in patients with increased PAP was 19.96 ± 2.36 lower than in patients without an increase of 25.51 ± 1.19. The medial and longitudinal basal diameters of the right ventricle were both significantly higher in patients with increased PAP, as was the area of the right atrium 17.57 ± 2.23 mm compared with 13.33 ± 1.14 mm in patients without increased PAP. Pulmonary arterial hypertension in COVID-19 patients is mostly mild at 85.7%, moderate and severe only account for a small proportion of 10.7% and 3.6%, mainly in severe illness areas. 78.6%, less in the recovery area with 21.4%. Patients with increased PAP showed a high white blood cell count of 16.21 ± 7.19 K/µL, a high D-Dimer 4508 ± 7208 ng/mL, a high Ferritin 1163 ± 738 ng/mL, a high CRP of 111.4 ± 77.9 ng/mL compared with the group without increased PAP. Conclusion: Echocardiography is a simple and quick modality to detect, monitor and evaluate pulmonary hypertension during the treatment of COVID-19 patients.