In the present study we have characterized the evolution of changes in systemic haemodynamics (thermodilution in conscious animals) and sodium balance (metabolic cages) in a model of liver cirrhosis induced by chronic bile duct ligation (BDL). Mean arterial pressure (BDL, 111.5±4.7 mmHg; sham-operated, 122.9±3.0 mmHg) and peripheral vascular resistance (BDL, 2.63±0.08 units; sham-operated, 2.93±0.09 units) were lower in BDL rats from day 12 after surgery and decreased progressively throughout the following days. Portal hypertension was evident earlier in BDL rats and was maintained throughout the study period. Cardiac index (BDL, 58.8±3.9 ml·min-1·100 g-1; sham-operated, 43.9±1.5 ml·min-1·100 g-1) and stroke volume (BDL, 147.2±12.7 ml·beat-1·100 g-1; sham-operated, 109.0±4.2 ml·beat-1·100 g-1) were significantly elevated in the BDL rats only from day 18 after surgery. There were no significant differences in sodium balance between the groups until day 16 after surgery, at which time BDL animals started to retain significantly more sodium than the controls. Sodium retention increased progressively, and at day 20 BDL rats had retained 0.7 mmol/100 g more than the control animals (accumulated retention: BDL, 2.2±0.2 mmol/100 g; sham-operated, 1.5±0.2 mmol/100 g). Plasma renin activity and aldosterone concentration were not elevated in the BDL animals at days 12, 16 or 20 after surgery. These data indicate that the BDL rat model shows early portal hypertension, peripheral vasodilation and arterial hypotension, several days before sodium retention is detectable, and in the absence of changes in plasma levels of renin and aldosterone. Overall, these data suggest that, in the BDL rat model, sodium retention is secondary to portal hypertension and peripheral vasodilation.
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April 26 2000
Haemodynamic and renal evolution of the bile duct-ligated rat
Concepción MARTÍNEZ-PRIETO;
Concepción MARTÍNEZ-PRIETO
*Unidad de Aparato Digestivo, Hospital de la Vega Baja, Orihuela, Alicante, Spain
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M. Clara ORTÍZ;
M. Clara ORTÍZ
†Departamento de Fisiología, Facultad de Medicina, 30100 Murcia, Spain
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Lourdes A. FORTEPIANI;
Lourdes A. FORTEPIANI
†Departamento de Fisiología, Facultad de Medicina, 30100 Murcia, Spain
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Jose Antonio RUIZ-MACIÁ;
Jose Antonio RUIZ-MACIÁ
‡Anatomía Patológica, Hospital de la Vega Baja, Orihuela, Alicante, Spain
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Noemí M. ATUCHA;
Noemí M. ATUCHA
†Departamento de Fisiología, Facultad de Medicina, 30100 Murcia, Spain
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Joaquín GARCÍA-ESTAÑ
†Departamento de Fisiología, Facultad de Medicina, 30100 Murcia, Spain
Correspondence: Dr Joaquín García-Estañ (e-mail [email protected]).
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Publisher: Portland Press Ltd
Received:
October 22 1999
Revision Received:
January 04 2000
Accepted:
February 02 2000
Online ISSN: 1470-8736
Print ISSN: 0143-5221
The Biochemical Society and the Medical Research Society © 2000
2000
Clin Sci (Lond) (2000) 98 (5): 611–617.
Article history
Received:
October 22 1999
Revision Received:
January 04 2000
Accepted:
February 02 2000
Citation
Concepción MARTÍNEZ-PRIETO, M. Clara ORTÍZ, Lourdes A. FORTEPIANI, Jose Antonio RUIZ-MACIÁ, Noemí M. ATUCHA, Joaquín GARCÍA-ESTAÑ; Haemodynamic and renal evolution of the bile duct-ligated rat. Clin Sci (Lond) 1 May 2000; 98 (5): 611–617. doi: https://doi.org/10.1042/cs0980611
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