[Parameters of heart rate variability during bicycle ergometry test].
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.
Parnes
E Ia
EIa
Moscow State Medical Dental University, ul. Delegatskaya 20, 103473 Moscow, Russia.
Koshkina
E V
EV
Krasnoselskiĭ
M Ia
MIa
D000293:Adolescent; D000328:Adult; D000368:Aged; D005080:Exercise Test; D017079:Exercise Tolerance; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000503:physiopathology; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000150:complications / Q000503:physiopathology*; D013610:Tachycardia / Q000503:physiopathology