Acute intraventricular hemorrhage triggered by coughing following return from high altitude: a case report and literature review

This case indicates that even brief stays at moderately high altitude may impair cerebrovascular self-regulation and increase stress on blood vessel walls. The resulting instability in blood flow during re-adaptation to lower elevation, combined with a sudden rise in intracranial pressure from a Valsalva-type action such as coughing, could lead to the rupture of susceptible vessels. Medical practitioners should consider this possible cause in cases of neurological emergency where there is a recent history of high-altitude exposure.