| Title | [Parameters of heart rate variability during bicycle ergometry test]. | ||
| Author | Parnes, E Ia; Koshkina, E V; Krasnoselskii, M Ia | ||
| Journal | Kardiologiia | Publication Year/Month | 2003 |
| PMID | 14593379 | PMCID | -N/A- |
| Affiliation | 1.Moscow State Medical Dental University, ul. Delegatskaya 20, 103473 Moscow, Russia. | ||
Short-term (5 min) heart rate variability (HRV) was studied before and during submaximal bicycle exercise tests in 27 patients with ischemic heart disease, 23 patients with hypertension and 9 healthy subjects. Low-frequency (0.04 to 0.15 Hz) and high-frequency (0.15 to 0.40 Hz) power components of HRV were significantly decreased during submaximal exercise. The level of load at which abrupt decrease of low-frequency components below 40 ms(2) occurred possibly reflected individual exercise tolerance. Episodes of myocardial ischemia were associated with pronounced decreases of low - frequency HRV components.