What Researchers Did
Researchers investigated how hyperbaric hyperoxia affects myocardial diastolic function and arterial endothelial function in younger and older male volunteers.
What They Found
They found that hyperoxia significantly decreased heart rate and systolic/diastolic flow-mediated dilatation (FMD) in all 51 male participants. Diastolic function parameters varied, with the E/A ratio increasing in younger volunteers (n=28) but remaining unchanged in older volunteers (n=23), and ejection fraction decreasing only in the older group.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
A limitation of this study is its focus solely on male participants, which may limit the generalizability of the findings to females.