What Researchers Did
Researchers ran a randomized study measuring cardiorespiratory changes in 14 adults during a single HBOT session involving two hours of pure oxygen above atmospheric pressure, comparing HBOT patients to controls.
What They Found
HBOT caused a decrease in pulse rate of 16 beats per minute at 35 minutes into the session and increased peripheral oxygen saturation compared to controls. Blood pressure and lung volumes did not change significantly.
What This Means for Canadian Patients
This study confirms HBOT sessions cause measurable heart rate slowing, a normal physiological response to breathing high-pressure oxygen. Canadian nurses and technicians monitoring patients during HBOT should anticipate a heart rate drop as an expected finding rather than a sign of deterioration.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
The study had only 7 patients per group and measured only a single HBOT session; longer-term cardiovascular effects were not assessed.