What Researchers Did
Researchers investigated the effect of hyperbaric oxygenation (HBO) on central hemodynamics in 32 patients with ischemic stroke, using tetrapolar rheography before, during, and after HBO sessions.
What They Found
Initial hyperbaric oxygenation (HBO) sessions caused a general vasoconstricting effect and decreased cardiac output in most patients, though subsequent sessions normalized initially abnormal hemodynamics. HBO sessions generally did not alter arterial pressure, except for a mild elevation in systolic and mean pressure in patients with vertebrobasilar pathology. Hyperbaric oxygen also reduced the rate of cardiac contractions by 9%, regardless of the initial pulse rate.
What This Means for Canadian Patients
For Canadian patients experiencing ischemic stroke, these findings suggest that hyperbaric oxygenation could influence central hemodynamics, potentially offering a therapeutic avenue. However, careful monitoring of cardiac output and blood pressure, especially during initial sessions and in specific stroke types, would be crucial if this treatment were considered.
Canadian Relevance
This study has no direct Canadian connection as it was conducted outside of Canada.
Study Limitations
A limitation of this study is its relatively small sample size of 32 patients, which may limit the generalizability of the findings.