Inclusion Criteria:  Diagnostic confirmation of SARS-CoV-2 infection by positive result in at least one test:  Rapid nasopharyngeal smear antigen test. PCR smear or nasopharyngeal aspirate. Sputum PCR. PCR of bronchoalveolar lavage. Positive IgM in the serology for SARS-CoV2 Hospitalization for COVID-19 pneumonia More than 5 days from the date of onset of symptoms (this criterion can be met during hospitalization).  Elevated D-dimer, by any of the following criteria:  DD> 500 ng/ml; In the case of patients over 50 years of age, the DD cut-off point adjusted for age (age x 10) will be applied. With the DDU measurement, the cut-off point is 250 mg/dl (instead of 500) and the adjustments for age in those over 50 years are made by multiplying the age x 5 (instead of x 10).  Exclusion Criteria:  Pregnancy. Age <18 years. Hemodynamic instability: SBP <90 mmHg or vasopressors to achieve ≥ 90 mmHg.  Contraindication for performing CT angiography:  Severe kidney failure (GFR <30) Allergy to iodinated contrasts. Intolerance to decubitus.