Sildenafil: Possible Prophylaxis against Swimming-induced Pulmonary Edema.
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Swimming-induced pulmonary edema (SIPE) occurs during swimming and scuba diving, usually in cold water, in susceptible healthy individuals, especially military recruits and triathletes. We have previously demonstrated that pulmonary artery (PA) pressure and PA wedge pressure are higher during immersed exercise in SIPE-susceptible individuals versus controls, confirming that SIPE is a form of hemodynamic pulmonary edema. Oral sildenafil 50 mg 1 h before immersed exercise reduced PA pressure and PA wedge pressure, suggesting that sildenafil may prevent SIPE. We present a case of a 46-yr-old female ultratriathlete with a history of at least five SIPE episodes. During a study of an exercise submerged in 20°C water, physiological parameters before and after sildenafil 50 mg orally were as follows: O2 consumption 1.75, 1.76 L·min; HR 129, 135 bpm; arterial pressure 189/88 (mean 121.5), 172/85 (mean 114.3) mm Hg; mean PA pressure 35.3, 28.8 mm Hg; and PA wedge pressure 25.3, 19.7 mm Hg. She has had no recurrences during 20 subsequent triathlons while taking 50 mg sildenafil before each swim. This case supports sildenafil as an effective prophylactic agent against SIPE during competitive surface swimming.
Pulmonary Wedge Pressure
Published Version (Please cite this version)10.1249/MSS.0000000000001293
Publication InfoFreiberger, John Jacob; Kernagis, DN; Martina, SD; Moon, Richard Edward; Natoli, Michael J; Otteni, CE; ... Schinazi, EA (2017). Sildenafil: Possible Prophylaxis against Swimming-induced Pulmonary Edema. Med Sci Sports Exerc, 49(9). pp. 1755-1757. 10.1249/MSS.0000000000001293. Retrieved from https://hdl.handle.net/10161/16173.
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Associate Professor of Anesthesiology
Dr Freiberger works on the translation of basic science research on reactive oxygen species signaling into clinical practice involving hyperbaric oxygen (HBO). He has performed animal experiments in the use of HBO for ischemic preconditioning and he is currently funded to conduct a randomized controlled trial of the use of HBO for the treatment of bisphosphonate-induced osteonecrosis of the jaw. The mechanisms of action for HBO in the treatment of: diabetic wounds, bony and soft tissue rad
Professor of Anesthesiology
Research interests include the study of cardiorespiratory function in humans exposed to environmental conditions ranging from 200 feet of seawater depth to high altitude, gas exchange during diving, the pathophysiology of high altitude pulmonary edema, the effect of anesthesia and postoperative analgesia on pulmonary function and monitoring of tissue oxygenation. Ongoing human studies include the use of fractals to study breathing patterns during environmental and perioperative stress, mechanism
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