Document Detail


The role of increased pulmonary blood flow in pulmonary arterial hypertension.
MedLine Citation:
PMID:  16135733     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Chronic increased pulmonary blood flow is considered a pre-requisite for the induction of advanced vascular lesions in pulmonary arterial hypertension in congenital heart defects. The aim of the present study was to characterise the effects of increased pulmonary flow induced by an aortocaval shunt in the monocrotaline rat model for pulmonary hypertension in terms of survival, haemodynamics, pathology and histology. Male Wistar rats were injected with monocrotaline followed by the creation of an abdominal aortocaval shunt. Animals were sacrificed when displaying symptoms of weight loss or dyspnoea, 4-5 weeks after the creation of the shunt. Echocardiography identified increased ventricular dimensions in shunted rats and right ventricular hypertrophy in monocrotaline-treated rats. At similar pulmonary artery pressures, shunted monocrotaline rats displayed higher morbidity and mortality, increased pulmonary-to-systemic artery pressure ratios and increased right ventricular hypertrophy compared with nonshunted monocrotaline rats. Histological assessment demonstrated increased number and diameter of pre-acinar pulmonary arteries. Intra-acinar vessel remodelling and occlusion occurred to a similar extent in shunted and nonshunted monocrotaline rats. In conclusion, increased pulmonary blood flow in monocrotaline-induced pulmonary hypertension is associated with increased morbidity, mortality, and unfavourable haemodynamic and cardiac effects. These effects could be attributed to more pronounced right heart failure rather than to altered intra-acinar pulmonary vessel remodelling.
Authors:
M E van Albada; R G Schoemaker; M S Kemna; A H Cromme-Dijkhuis; R van Veghel; R M F Berger
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The European respiratory journal     Volume:  26     ISSN:  0903-1936     ISO Abbreviation:  Eur. Respir. J.     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-09-01     Completed Date:  2005-10-25     Revised Date:  2013-05-23    
Medline Journal Info:
Nlm Unique ID:  8803460     Medline TA:  Eur Respir J     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  487-93     Citation Subset:  IM    
Affiliation:
Dept of Experimental Cardiology, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands. m.e.van.albada@med.umcg.nl
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Pressure / physiology
Disease Models, Animal
Heart Atria / pathology
Heart Bypass, Right
Heart Valves / pathology,  ultrasonography
Hypertension, Pulmonary / diagnosis*,  etiology,  physiopathology*
Lung / pathology
Male
Monocrotaline
Pulmonary Artery / pathology
Pulmonary Circulation / physiology*
Rats
Rats, Wistar
Chemical
Reg. No./Substance:
315-22-0/Monocrotaline

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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