Endoscopic Ultrasonographic Study of the Azygos Vein Before and After Endoscopic Obliteration of Esophagogastric Varices by Injection Sclerotherapy

Abstract

Using EUS and Doppler EUS, hemodynamic studies of the azygos vein blood flow can be performed, allowing the monitoring of the effects of EIS and variceal obliteration on the superior portosystemic collateral circulation. The clinical significance of the observed changes in azygos blood flow that occur with variceal obliteration should be investigated in further studies and correlated with short-term and long-term outcome.

Validation of Endoscopic Ultrasound Measured Flow Rate in the Azygos Vein Using a Flow Phantom

“…11, pp. 1957-1964, 2010 (Kassem et al 2000). EUS studies have also been used to monitor the change in flow rate, diameter and velocity occurring as a result of pharmacological intervention (Lee et al 1999;Nishida et al 2001;Hansen et al 2001).…”

Esophageal Varices: Evaluation with Transesophageal MR Imaging—Initial Experience

“…The relationship between flow in the azygos vein and that in esophageal varices, however, is debated because the azygos vein also has an inflow coming from the general circulation (36,37).…”

Hemodynamics of esophageal varices on three‐dimensional endoscopic ultrasonography and indication of endoscopic variceal ligation

“…Previous studies warned about the potential recurrence in patients with paraesophageal veins and that such veins are a risk factor for recurrence 32–34 . However, some recent reports have indicated that patients with paraesophageal veins tend to have a lower risk of recurrence 35–37 . This suggests that paraesophageal veins may enhance draining and may be a recurrence‐preventing factor.…”