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Fig. 3. An example of the patterns of blood pressure of file snakes (Acrochordus arafurae) associated with head-up, straight tilts to 30°, 45° or 70°. Blood pressures at heart level in the central aorta (CAP) and central post-caval vein (CVP) are shown. CVP was measured below the heart but adjusted to heart level, causing apparent negative values.





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