It’s true that we didn’t mention the blood pressure issue at all in the 2009 paper. But that’s not because we don’t have any answers; it’s because we’re keeping our powder dry for a separate publication, currently in prep.

I just came across your contribution to the sauropod neck debate.
There should not be a dichotomy between anatomy and physiology to understand whether or not sauropods could raise their heads. Of course one needs both. If either anatomy or physiology would prevent raising of the head, then the animals couldn’t do it.
The paper by Taylor et al. is based on neck positions in living animals, all of which are small. Because the problem of blood pressure and the energy required to maintain it depends on the absolute vertical distance above the heart, looking at small animals is pointless. But one immediately sees that the giraffe has blood pressure problems with a 2 meter neck. For a vertical 9 m neck, the problem becomes prohibitive in my view.
It is telling that Taylor et al. not only did not solve the blood pressure problem, they didn’t even mention that it exists, although they corresponded with me before publication.
Anyone is free to invent solutions to the sauropod problem that do not exist in living animals, but so far, in 35 years since I first mentioned this problem, no one has satisfactorily solved it. Usually, it is simply ignored or stated to be a curious unsolvable paradox, so strong is the need to keep the sauropod heads in the trees.