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First published online October 27, 2003
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Ventricular haemodynamics in Python molurus: separation of pulmonary and systemic pressures

Tobias Wang1,*, Jordi Altimiras2, Wilfried Klein3 and Michael Axelsson4

1 Department of Zoophysiology, University of Aarhus, 8000 Aarhus C, Denmark,
2 Department of Biology, IFM, University of Linköping, Sweden,
3 Institute of Zoology, University of Bonn, Germany
4 Department of Zoology, University of Gothenburg, Sweden



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  		Fig. 1. (A) Simultaneous measurements of systemic (right aortic arch) and pulmonary (left pulmonary artery) arterial blood pressures (Psys and Ppul, respectively) in a conscious and undisturbed specimen of Python molurus. (B) Mean Psys and Ppul of five specimens. Values are means ± 1 S.E.M. (N=5). The asterisk indicates a significant difference between Psys and Ppul (P<0.05; paired t-test). 1 cm H2O=98 Pa.

 


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  		Fig. 2. Effects of vascular injections of (A) phenylephrine (25 µg kg–1) and (B) sodium nitroprusside (25 µg kg–1) on systemic (right aortic arch) and pulmonary (left pulmonary artery) arterial blood pressures (Psys and Ppul, respectively) in a conscious and undisturbed Python molurus. 1 cm H2O=98 Pa.

 


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  		Fig. 3. Simultaneous measurements of arterial pressure in the systemic and pulmonary circulation and intraventricular pressure in an anaesthetised Python. RAo, Right aortic arch; CA, cavum arteriosum; LPA, left pulmonary artery; CP, cavum pulmonale. 1 cm H2O=98 Pa.

 




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