Table 4– Number of patients who underwent transcatheter embolotherapy of pulmonary arteriovenous malformations (PAVMs) by pulmonary shunt grade on transthoracic contrast echocardiography (TTCE)
Pulmonary shunt on TTCEPersons nPAVM on chest CT n (%)Transcatheter embolotherapy performed n (% of positive chest CT)PPV % (95% CI)
No shunt2626 (2.3)0 (0)0 (0)
Grade 120127 (13.4)0 (0)0 (0)
Grade 215068 (45.3)38 (55.9)25.3 (19.1–32.9)
Grade 3159147 (92.5)123 (83.7)77.4 (70.3–83.2)
Total772248 (32.1)161 (64.9)

  • CT: computed tomography; PPV: positive predictive value.