oxygen pulse
The volume of oxygen consumed per heartbeat, calculated as oxygen uptake divided by heart rate, reflecting cardiac efficiency.
Full Definition
Oxygen pulse represents the milliliters of oxygen consumed per heartbeat and serves as an indirect measure of stroke volume and overall cardiac efficiency during exercise. Calculated by dividing oxygen uptake (VO₂) by heart rate, it typically increases progressively during incremental exercise testing until reaching a plateau at maximal effort. In trained athletes, oxygen pulse values are characteristically elevated due to larger stroke volumes and enhanced oxygen extraction. Abnormal oxygen pulse responses during exercise testing can indicate cardiac dysfunction, chronotropic incompetence, or impaired peripheral oxygen utilization. This parameter is particularly valuable in sports cardiology for assessing cardiac functional capacity and training adaptations.
Usage
Usage note: Use consistent units (mL/beat); distinguish from pulse oximetry measurements.
In Context
- "The elite rower's oxygen pulse of 28 mL/beat at peak exercise demonstrated exceptional cardiac efficiency." — Exercise physiology report
- "A blunted oxygen pulse response suggested possible cardiac limitation rather than peripheral factors in this athlete's exercise intolerance." — Cardiopulmonary exercise test interpretation