Detection of respiratory frequency in the recordings of electrocardiogram, blood pressure or sympathetic nerve activity in the conscious rat.
We extracted the respiratory frequency in conscious rats from variations of blood pressure, electrocardiogram, or renal sympathetic nerve activity by means of a band-pass filter. The frequency derived from any one of these parameters corresponded to directly recorded respiratory chest movements. The method may be useful when respiration and cardiovascular parameters have to be recorded in small animals during steady state when minimal surgical intervention is crucial.
Nakamura
T
T
Occupational Health Training Center, School of Medicine, University of Occupational and Environmental Health, Japan. Kitakyushu, Japan.
Hirakawa
H
H
Hayashida
Y
Y
Nakashima
Y
Y
Kuroiwa
A
A
D000200:Action Potentials; D000818:Animals; D001794:Blood Pressure; D003243:Consciousness / Q000502:physiology*; D004562:Electrocardiography; D007668:Kidney / Q000294:innervation; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012119:Respiration; D013564:Sympathetic Nervous System / Q000502:physiology*