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Changes in cardiac output distribution after liver dearterialization in the rat
Acta Chirurgica Scandinavica
|January 1, 1977
Summary
Hepatic artery ligation in rats significantly reduced liver blood supply, which was partially offset by preportal arteriovenous shunting. Cardiac output distribution also temporarily shifted away from the colon and spleen.
Area of Science:
- Cardiovascular Physiology
- Hepatobiliary Medicine
- Surgical Research
Background:
- Hepatic artery ligation is a surgical procedure impacting liver blood flow.
- Understanding the compensatory mechanisms and systemic effects of altered hepatic perfusion is crucial.
Purpose of the Study:
- To investigate the impact of hepatic artery ligation and ligament division on cardiac output distribution in rats.
- To identify compensatory mechanisms for reduced liver blood supply.
Main Methods:
- Surgical intervention in rats involving hepatic artery ligation and ligament division.
- Assessment of cardiac output distribution post-operatively.
Main Results:
- A significant and persistent decrease in arterial blood supply to the liver was observed up to four weeks post-operation.
- Evidence of arteriovenous shunting in the preportal region partially counterbalanced the reduced liver blood supply.
- Temporary redistribution of cardiac output, with reduced fractions to the colon and spleen, noted two weeks after the procedures.
Conclusions:
- Hepatic artery ligation profoundly affects liver perfusion and induces compensatory arteriovenous shunting.
- The study highlights a temporary systemic redistribution of blood flow following hepatic artery ligation in rats.
