Journal: American Journal of Physiology - Regulatory, Integrative and Comparative Physiology

Article Title: Active and passive heat stress similarly compromise tolerance to a simulated hemorrhagic challenge

doi: 10.1152/ajpregu.00199.2014

Figure Lengend Snippet: Core and skin temperatures before and during lower body negative pressure (LBNP) to presyncope in all conditions. Mean skin and core body temperatures increased with all methods of heat stress before LBNP. However, by design, mean skin temperatures were higher after passive heat stress and active 38 (∼38°C, active 38) trials compared with active 36 (36°C, active 36) (both P ≤ 0.05), and remained higher throughout LBNP to presyncope. At presyncope, mean skin temperature was unchanged (P > 0.05), whereas core temperature was slightly elevated in the passive heat stress and active 38 trials. Data are means ± SD at baseline, immediately before LBNP (pre-LBNP), throughout LBNP at 20, 40, 60, and 80% of maximal cumulative stress index (CSI), and at presyncope. *Different from baseline in all trials (P ≤ 0.05). #Different from pre-LBNP in passive heat stress and active 38 trials only (P ≤ 0.05). λDifferent from active 36 (P ≤ 0.05).

Article Snippet: Throughout LBNP, arterial blood pressures were also measured at the brachial artery by auscultation (Tango, Suntech Medical Instruments, Raleigh, NC).

Techniques:

Journal: American Journal of Physiology - Regulatory, Integrative and Comparative Physiology

Article Title: Active and passive heat stress similarly compromise tolerance to a simulated hemorrhagic challenge

doi: 10.1152/ajpregu.00199.2014

Figure Lengend Snippet: Heart rate and blood pressure responses before and during LBNP to presyncope in all conditions. When expressed relative to a percentage of maximal CSI, heart rate and mean arterial pressure were not different between trials at any point. In all trials, blood pressure and heart rate decreased at presyncope relative to 80% CSI. Data are means ± SD at baseline, immediately before LBNP (pre-LBNP), throughout LBNP at 20, 40, 60, and 80% of maximal CSI and at presyncope. *Different from baseline in all trials (P ≤ 0.05). §Different from 80% CSI in all trials (P ≤ 0.05).

Article Snippet: Throughout LBNP, arterial blood pressures were also measured at the brachial artery by auscultation (Tango, Suntech Medical Instruments, Raleigh, NC).

Techniques: