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. 2014 Aug 27;307(8):R1036–R1041. doi: 10.1152/ajpregu.00151.2014

Fig. 1.

Fig. 1.

Left ventricular end diastolic volumes (LVEDV) at baseline and at 30 mmHg lower body negative pressure (LBNP) during the three conditions: normothermia, heat stress, and heat stress + volume infusion. Heat stress reduced LVEDV, while volume infusion increased LVEDV, such that it was not different from thermoneutral conditions. LBNP reduced LVEDV in all thermal conditions (P < 0.05), but the magnitude of this reduction was attenuated after volume infusion relative to both thermoneutral and heat stress conditions. †Significantly different relative to the respective heat stress condition (P < 0.05). ¥Significantly different, LVEDV lower relative to respective value prior to LBNP (P < 0.05). ‡Significantly different; magnitude of reduction in LVEDV during LBNP was less relative to reductions in this variable during normothermia (P < 0.05) and heat stress conditions (P < 0.01).