Esophageal varices: evaluation with transesophageal MR imaging--initial experience

Area of Science:

• Medical Imaging
• Gastroenterology
• Cardiovascular Imaging

Background:

• Esophageal varices are a serious complication of portal hypertension.
• Accurate assessment of varix morphology and hemodynamics is crucial for management.
• Endoscopic grading provides morphologic information but limited hemodynamic data.

Purpose of the Study:

• To prospectively evaluate transesophageal magnetic resonance (MR) imaging for characterizing esophageal varices.
• To determine the morphologic and hemodynamic parameters of esophageal varices using MR imaging.
• To assess the feasibility of MR imaging in evaluating treatment response.

Main Methods:

• Forty-two patients with esophageal varices underwent transesophageal MR imaging.
• Black-blood T2-weighted images were acquired with cardiac triggering and navigator gating.
• Morphometric measurements (diameter, surface area) and hemodynamic assessments (flow velocity, rate) were performed.
• Hemodynamic changes were evaluated after octreotide or placebo administration.

Main Results:

• MR imaging revealed periesophageal varices in 36 patients and paraesophageal varices in 32.
• Varix size and surface area correlated significantly with endoscopic grade (P < .001).
• Octreotide significantly reduced varix velocity and flow (P < .001), unlike placebo.

Conclusions:

• Transesophageal MR imaging is a feasible technique for assessing esophageal varices.
• It provides detailed morphologic and hemodynamic information.
• This method can be used to evaluate the effects of pharmacologic treatments on varices.