Incidence and severity of pulmonary embolism in COVID-19 infection: Ancestral, Alpha, Delta, and Omicron variants

Figures

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  Figure 1.. Changes in the proportion of vaccination, hospitalization, ICU admission, and all-cause death along the course of evolution of COVID-19 variant among patients who had CTPA. * ICU admission rate was significantly lower during the Alpha variant period than during the ancestor strain period (Bonferroni-adjusted P = .04). ** ICU admission rate was significantly lower during the Omicron variant period than during the ancestor strain period (Bonferroni-adjusted P = .009). *** The proportion of vaccination significantly increased across the periods (P < .0001). COVID-19 = coronavirus disease 2019, CTPA = computed tomography pulmonary angiogram, ICU = intensive care unit.

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  Figure 2.. CT pulmonary angiograms in a 38-year-old man with PE in the main arteries, who had COVID-19 diagnosis during Omicron variant period. The patient had diabetes mellitus, hypertension, chronic kidney disease, and vaccination. CT pulmonary angiography was performed 8 days after diagnosis. (A) The image shows a saddle embolus to right and left main pulmonary arteries (yellow arrows). (B) The image shows multifocal bilateral ground-glass opacities and subpleural wedge-shaped consolidation. COVID-19 = coronavirus disease 2019, CT = computed tomography.

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  Figure 3.. CT pulmonary angiograms in a 63-year-old woman with PE in the right lower lobe segmental artery, who had COVID-19 diagnosis during Delta variant period. The patient had lung disease, without vaccination. CT pulmonary angiography was performed 9 days after diagnosis. (A) The image shows PE in right lower lobe segmental artery (yellow arrow). (B) The image shows diffuse ground-glass opacities and peripheral subpleural consolidation accompanying focal spared areas. COVID-19 = coronavirus disease 2019, CT = computed tomography, PE = pulmonary embolism.

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  Figure 4.. CT pulmonary angiograms in a 75-year-old woman with PE in the right lower lobe subsegmental artery, who had COVID-19 diagnosis during ancestral strain period. The patient had diabetes mellitus, without vaccination. CT pulmonary angiography was performed 1 day after diagnosis. (A) The image shows PE in right lower lobe subsegmental artery (yellow arrow). (B) The image shows extensive ground-glass opacities and organizing consolidations were extended in subpleural region. COVID-19 = coronavirus disease 2019, CT = computed tomography, PE = pulmonary embolism.