Portal de Periódicos da CAPES

Sustained hypoxia promotes hyperactive response of carotid body in the cat

2003; Elsevier BV; Volume: 134; Issue: 1 Linguagem: Inglês

10.1016/s1569-9048(02)00203-3

1878-1519

Camillo Di Giulio, W.-X. Huang, A. Mokashi, Arijit Roy, M. Cacchio, Monica Macrì, S. Lahiri,

Heart Rate Variability and Autonomic Control

Carotid body chemosensory activities were measured before and after 0.2, 5,6 and 7 h of sustained isocapnic (PaCO(2) approximately equal to 30 Torr) hypoxia (PaO(2) approximately equal to 43 Torr) in the cats (n=7). The activity increased from 5.4 impsec(-1) at 0.2 h to about 13 impsec(-1) at 7 h. This increase in chemosensory activities were due to both an augmented sensitivity and to a long-term facilitation and not due to arterial [H(+)] changes.