Background and aims: Up to 60% of patients treated with transjugular intrahepatic portosystemic shunt (TIPS) require angioplasty or restenting during the first year of follow up because of TIPS dysfunction (stenosis of the intrahepatic shunt increasing the portal pressure gradient above the 12 mm Hg threshold). We hypothesised that in patients with TIPS stenosis, propranolol administration, by ...

In experimental obstructive chronic pancreatitis the normal hyperaemic response to secretory stimulation is lost, suggesting abnormal vascular regulation. Vascular regulatory mechanisms were investigated by observing the effect of increments in portal pressure on pancreatic blood flow in normal cats and cats with chronic pancreatitis. Normal cats maintained pancreatic blood flow until portal pr...

Available experimental models of portal hypertension are based either on cirrhosis or externally applied portal vein constricting devices. A new method is described of raising portal pressure, which uses intraportally injected microspheres to block intrahepatic portal radicles, which has the advantages of retaining normal liver architecture and providing a more clinically relevant intrahepatic ...

OBJECTIVE Only a limited proportion of patients needing pharmacological control of portal hypertension are hemodynamic responders to propranolol. Here we analyzed the effects of zolmitriptan on portal pressure and its potential interaction with propranolol. METHODS ZOLMITRIPTAN, PROPRANOLOL OR BOTH WERE TESTED IN TWO RAT MODELS OF PORTAL HYPERTENSION: common bile duct ligation (CBDL) and CCl4...

A prospective study was undertaken to evaluate the changes in portal venous pressure in patients with benign biliary obstruction (BBO) but without overt clinical, endoscopic or radiological evidence of portal hypertension. Portal venous pressure was measured at laparotomy in 20 patients (10 each with either benign biliary stricture or choledocholithiasis) before and after biliary decompression....

In experimental obstructive chronic pancreatitis the normal hyperaemic response to secretory stimulation is lost, suggesting abnormal vascular regulation. Vascular regulatory mechanisms were investigated by observing the effect of increments in portal pressure on pancreatic blood flow in normal cats and cats with chronic pancreatitis. Normal cats maintained pancreatic blood flow until portal pr...

a 28-year-old, 32 week pregnant primigravida woman with a past history of increased blood pressure presented with ruq pain as well as sudden onset of hematemesis. this case illustrates the occurrence of a rare complication (rupture of portal vein pseudoaneurysm inside the biliary system), appearing as upper gastrointestinal bleeding in a pregnant woman. the cause of the rupture is presumably pr...

1. The effects of propranolol on heart rate, arterial pressure, portal venous pressure and fractional hepatic blood flow were studied in rats with hepatic artery ligature or with portal vein stenosis, and in sham-operated rats. The effect of propranolol on cardiac output was also studied in normal rats. 2. In rats with hepatic artery ligature or with portal vein stenosis, and in sham-operated r...

HANSON, KENNETH M., AND PAUL C. JOHNSON. 4kzzl control of hepatic arterial and portal uenous jaw in the dog. Am. J. Physiol. 211(3): 712-720. I g66.-Hemodynamic studies were made in over IOO experiments on the denervated, autoperfused, dog liver in situ. Electromagnetic flowmeters were used. Data\ are given on pressure-flow relationships in both vascular circuits, with and without simultaneous ...