Acceleration-Induced Electrocardiographic Interval Changes,
AIR FORCE ACADEMY COLORADO SPRINGS CO
Pagination or Media Count:
ELECTROCARDIOGRAPHIC ECG intervals vary in response to changes in heart rate. Variations in these intervals are also affected by exercise but in a manner not solely dependent on heart rate changes 2. Alterations in such factors as autonomic tone have an effect, especially on the GT interval. A quantitative description of the QT-interval response to Gz stress is necessary for defining the normal ECG response. Once the normal response has been defined, it might be possible to identify individuals with an altered response to Gz stress. If ECG interval responses are due to autonomic imbalance, then a more in-depth understanding of the sympathetic and parasympathetic vagal interactions within the cardiovascular system should be possible. This manuscript describes the ECG interval response of healthy individuals to low and high Gz stress both during the stress and in the recovery period. Keywords Gravity tolerances, Reprints.
- Stress Physiology