Why the study?
How do stroke volume and cardiac output change during head-up and head-down tilt compared to a resting supine position in healthy humans?
How do stroke volume and cardiac output change during head-up and head-down tilt compared to a resting supine position in healthy humans?
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Stroke volume and cardiac output are maximal in the supine position and decrease during both head-up tilt and 90-degree head-down tilt, despite increased preload in the latter.
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Bundgaard‐Nielsen et al. (2009) studied this question.
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