Arterial Compliance in Divers Exposed to Repeated Hyperoxia Using Rebreather Equipment

Abstract : compliance in divers exposed to repeated hyperoxia using rebreather equipment. Aviat Space Environ Med 2009; 80: 482 – 4. Background: Acute hyperoxic exposure is known to modify cardio-vascular parameters like a decrease in cardiac output, arterial vasocon-striction, and autonomic nervous system changes. We hypothesized that repeated hyperbaric hyperoxic exposures, as experienced by military oxygen divers, lead to long-term arterial alterations. Methods: Arterial blood pressure measurements and pulse wave velocity (PWV) recordings were performed during basal conditions in 15 elite military oxygen divers, and compared to 15 non-diver controls. The two groups were matched appropriately for physical characteristics (age: 35 6 5 yr, weight: 77 6 8 kg, height: 177 6 6 cm, body mass index: 24.6 6 2.0 kg z m 2 2), and aerobic capacity (V O 2 max : 52 6 7 ml z min 2 1 z kg 2 1). Results: No signifi cant difference was found in systolic blood pressure (120 6 11 mmHg), dia-stolic blood pressure (70 6 8 mmHg), or pulse pressure (50 6 7 mmHg). Furthermore, there was no signifi cant difference in the carotid-femoral PWV (6.7 6 0.9 m z s 2 1), the carotid-radial PWV (8.7 6 1.7 m z s 2 1), or the carotid-pedal PWV (8.1 6 1.1 m z s 2 1) between divers and controls. Conclusion: No difference in arterial compliance was observed in physically well-trained military oxygen divers in comparison with matched controls.
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Yoann Gole, Pascal Rossi, P. Fontanari, Olivier Gavarry, Alain Boussuges. Arterial Compliance in Divers Exposed to Repeated Hyperoxia Using Rebreather Equipment. Aviation, Space, and Environmental Medicine, Aerospace Medical Association, 2009, 80 (5), pp.482 - 484. ⟨10.3357/ASEM.2457.2009⟩. ⟨hal-01808475⟩

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