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A historical perspective on high altitude pulmonary edema
Gian Franco Gensini1, Andrea A Conti
1Dipartimento di Area Critica Medico Chirurgica, Università degli Studi di Firenze, Fondazione Don Carlo Gnocchi, Firenze.
Summary
High altitude pulmonary edema (HAPE) is a severe condition complicating acute mountain sickness. Research highlights its hydrostatic nature and altered capillary permeability, emphasizing the need for prevention and treatment.
Area of Science:
- Cardiology
- Pulmonary Medicine
- Altitude Medicine
Background:
- High altitude pulmonary edema (HAPE) is a life-threatening complication of acute mountain sickness.
- Historical accounts trace documented cases of HAPE back to the late 19th century.
Observation:
- Overt HAPE presents with hypoxemia, pulmonary hypertension, and radiographic evidence of alveolar edema.
- Early research by Ravenhill and Hultgren established diagnostic frameworks and hypothesized cardiac involvement.
- Recent studies indicate elevated pressure in the pulmonary microcirculation contributes to fluid overload.
Findings:
- Acute pulmonary hypertension is a key pathophysiological factor in HAPE.
- HAPE is currently viewed as hydrostatic pulmonary edema with modified alveolar-capillary permeability.
- The exact mechanism causing pathological vasoconstriction in susceptible individuals remains unknown.
Implications:
- Understanding HAPE's pathophysiology is crucial for developing effective preventive and therapeutic strategies.
- Continued research into the precise mechanisms of HAPE is needed.
- Recognizing the historical evolution of HAPE understanding aids current medical practice.