Background: Pulmonary hypertension is a significant complication of COVID-19, but follow-up data on pulmonary artery pressure after recovery from COVID-19 are limited. Objectives: To investigate pulmonary artery pressure and heart dimensions in post-COVID-19 patients without a history of significant cardiac pathology. Methods: Data for 91 eligible adult patients were subjected to 2 analyses. First, patients were grouped according to where they received COVID-19 treatment: the ICU, COVID-19 ward, or outpatient clinic. Second, the severity of COVID-19 was grouped as no pulmonary involvement, non-severe pulmonary involvement, or severe pulmonary involvement based on thoracic computed tomography scores. Heart dimensions were measured and pulmonary artery pressure was estimated using transthoracic echocardiography. The correlation between transthoracic echocardiography findings and COVID-19 severity was assessed. Results: Pulmonary artery pressure and right-heart dimensions were significantly elevated in the post-COVID-19 patients without a history of risk factors for pulmonary hypertension that presented to the cardiology outpatient clinic with cardiac complaints. Both of these findings were correlated with the severity of COVID-19 and the extent of lung involvement based on thoracic computed tomography. Conclusion: The present findings confirm that increases in systolic pulmonary artery pressure and right ventricular dimensions persist 2-3 months after recovery from COVID-19 in patients without a history of risk factor for pulmonary hypertension. Furthermore, the increase in pulmonary artery pressure and right ventricular dimensions correlate with the severity of COVID-19 and the extent of lung involvement based on thoracic computed tomography.