In those with underlying heart disease, effective control of congestive symptoms prevents<unk> . Dexamethasone is in widespread use for the prevention of high altitude<unk> . Sildenafil is used as a preventive treatment for altitude-induced<unk>  and<unk>  hypertension, the mechanism of action is via phosphodiesterase inhibition which raises cGMP, resulting in<unk>  arterial vasodilation and inhibition of smooth muscle cell proliferation. While this effect has only recently been discovered, sildenafil is already becoming an accepted treatment for this condition, in particular in situations where the standard treatment of rapid descent has been delayed for some reason.
Pulmonary edema
Pneumonia
Pleurisy
Emphysema
Hydrothorax
Pleural effusion
Pulmonary infiltrate
Atelectasis