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Portal hypertension: from bedside to bench
Roberto J Groszmann1, Juan G Abraldes
1Veterans Administration Medical Center, West Haven, CT 06516, USA. roberto.groszmann@yale.edu
Journal of Clinical Gastroenterology
|March 11, 2005
Summary
Portal hypertension initially stems from increased hepatic resistance, with portal blood flow exacerbating it later. Animal models were key to understanding these hemodynamic changes and molecular mechanisms, improving patient management.
Area of Science:
- Hepatology
- Gastroenterology
- Hemodynamics
Background:
- Portal hypertension is a critical complication of cirrhosis.
- Initial understanding focused on hepatic resistance, but later observations highlighted portal blood flow's role.
- Portosystemic collaterals develop but do not always resolve the condition.
Purpose of the Study:
- To review the historical development of understanding portal hypertension pathophysiology.
- To highlight the role of animal models in elucidating hemodynamic and molecular mechanisms.
- To connect early clinical observations with current knowledge of cirrhosis complications.
Main Methods:
- Review of seminal clinical observations from the 1950s.
- Analysis of research utilizing animal models of portal hypertension.
- Elucidation of hemodynamic and molecular mechanisms through bench research.
Main Results:
- Increased hepatic resistance is the initial driver of portal hypertension.
- Increased portal blood flow maintains and worsens portal hypertension.
- Animal models enabled detailed characterization of circulatory abnormalities and molecular pathways.
Conclusions:
- Understanding the pathophysiology of portal hypertension has evolved significantly.
- Animal models were instrumental in advancing knowledge and improving patient care strategies.
- Current understanding links portal hypertension mechanisms to severe cirrhosis complications like variceal bleeding and ascites.