Cardiovascular reflex tests and the resting heart rate at night and during testing.
Possible effects of environmental stress-induced elevation of the heart rate on the magnitude of cardiovascular autonomic responses were studied in 123 healthy subjects. The nocturnal heart rate was evaluated using ambulatory 24-h ECG monitoring. Some of the cardiovascular responses were found to be significantly weaker in those subjects whose resting heart rate during testing was greater than 10 beats min-1 higher than the resting nocturnal heart rate. It is thus highly important to minimize the environmental disturbances during autonomic testing.
Piha
S J
SJ
Rehabilitation Research Center of the Social Insurance Institution, Turku, Finland.
D000328:Adult; D000368:Aged; D004562:Electrocardiography; D004777:Environment; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D012146:Rest / Q000502:physiology; D013312:Stress, Physiological / Q000503:physiopathology