[Magnetic resonance angiography in assessing changes of pre-and post-disconnective portal system in patients with portal hypertension].

OBJECTIVE: To evaluate the role of magnetic resonance angiography (MRA) in assessing the portal system changes in patients with portal hypertension after pericardial devascularization and splenectomy. METHODS: The portal diameter, blood velocity and flow, collateral circulation, variceal vein and other portal parameters of 15 patients with portal hypertension receiving pericardial devascularization and splenectomy and splenectomy were comparatively evaluated with Siemens 1.5 T MRI 1 week before operation and 2 weeks after operation. RESULTS: The portal diameters decreased after operation, with the disappearance or alleviation of esophageal and fundal variceal veins. In 15 patients, 9 showed. The blood velocity and flow of the portal veins were lower postoperatively. than those preoperatively; In 15 patients, 9 showed increased gastric imaging intensity after operation. CONCLUSIONS: MRA can provide high quality and concrete 3-dimensional information about the portal system and hemodynamics of portal hypertensive patients. It is an important non-invasive way in evaluating the effects of operations and long-term follow-up. Postoperative gastric venous congestion possibly causes increased portal hypertensive gastropathy after disconnection.