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Transcranial Doppler for patent foramen ovale screening: is there a good correlation with transesophageal
Marcos Christiano Lange1, Viviane Flumignan Zétola, Admar Moraes de Souza
1Cerebrovascular Diseases, Neurology Division, Department of Internal Medicine, Hospital de Clínicas, Federal University of Paraná, Curitiba PR, Brazil. lange@ufpr.br
Unlabelled:
Right-to-left shunt (RLS) can be identified by contrast-enhanced transcranial Doppler (cTCD) in patent foramen ovale (PFO) patients.
Aim:
To evaluate cTCD for PFO screening comparing it to cTEE.
Method:
45 previous cTCD performed for PFO diagnosis and correlated its findings with cTEE. Patients were submitted to a cTCD standardized technique and were divided in two groups according to RLS: Group 1, patients with a positive RLS and Group 2 when RLS was negative.
Results:
29 (65%) patients were included in group 1 and 16 (35%) in group 2. PFO confirmation by cTEE was performed in 28 (62%) patients. cTCD had a 92.85% sensitivity, 82.35% specificity, 89.65% positive predictive value and 87.5% negative predictive value when compared to cTEE for PFO diagnosis.
Conclusion:
Standardized technique cTCD allows for RLS visualization in PFO patients with a good correlation with cTEE and can be used as a screening test before cTEE.
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