What Researchers Did
Researchers used noninvasive seismocardiography (SCG) to monitor myocardial contractility during simulated dives in healthy divers and compared it with invasive methods in ICU patients.
What They Found
They found a strong correlation (r(SP) = 0.87, p < 0.0001) between changes in ejection fraction measured by pulmonary artery catheter and g-values from SCG. During simulated hyperbaric exposure, heart rate significantly decreased from 68 to 58 min(-1) (p < 0.001), but the Contractility Index remained nearly unchanged.
What This Means for Canadian Patients
This noninvasive seismocardiography method could allow for stress-free monitoring of heart contractility in patients undergoing hyperbaric oxygen therapy. It may help ensure cardiac function remains stable during treatments that can induce bradycardia.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
The study involved a relatively small and specific population of healthy divers and ICU patients, which may limit generalizability.