Publication details
Evaluation of autonomic nervous system dysfunction by phase shift and XYt graph methods
| Authors | |
|---|---|
| Year of publication | 1999 |
| Type | Article in Periodical |
| Magazine / Source | American Journal of Hypertension |
| MU Faculty or unit | |
| Citation | |
| Field | Cardiovascular diseases incl. cardiosurgery |
| Keywords | autonomic nervous system; phase shift |
| Description | BACKGROUND: We postulated that the phase shift between blood pressure and heart rate fluctuation near the frequency of 0.10 Hz might be useful in assessing autonomic circulatory control. CONCLUSIONS: The frequency of 0.10 Hz represents a useful and potentially important one for controlled breathing, at which differences in blood pressure-RR interactions become evident. These interactions, whether computed as a variability of phase to define stability of the blood pressure-heart rate interaction or defined as the baroreflex sensitivity to define the gain in heart rate response to blood pressure changes, are significantly different in patients at risk for sudden arrhythmic death. |