Abnormalities of gastric emptying in portal hypertension.

OBJECTIVES: To investigate: 1) the rate of gastric emptying of portal hypertensive patients and 2) whether alterations in gastric emptying play any role in the development of portal hypertensive gastropathy.
METHODS: Fifty patients (37 with esophageal varices) with cirrhosis and seven with extrahepatic portal hypertension underwent upper GI endoscopy followed by radionuclide gastric emptying studies using a semi-solid meal. Twenty-six patients also under went corrected wedged hepatic venous pressure measurement. Sixteen normal subjects underwent gastric emptying studies only.
RESULTS: Varices were completely obliterated by sclerotherapy in 17 patients and were patent in 27. Thirty-seven patients had portal hypertensive gastropathy, 25 of whom had mild changes and 12 severe. No significant difference in gastric emptying was observed between patients with mild and severe portal hypertensive gastropathy and between those with portal hypertensive gastropathy and a normal gastric mucosa. There was no significant difference in gastric emptying between normal subjects and portal hypertensive patients although the latter group showed a tendency for faster gastric emptying. No difference in the rate of gastric emptying was observed between portal hypertensive patients with intrahepatic and extrahepatic pathology. However, patients with esophageal varices (patent and obliterated) emptied their stomachs significantly faster than those without (p = 0.01). There was no correlation between the rate of gastric emptying and corrected wedged hepatic venous pressure.
CONCLUSIONS: It would appear that, although alterations in gastric emptying are common in portal hypertension, gastric emptying does not appear to play a causative role in the mucosal changes characteristic of portal hypertensive gastropathy.