Fig. 1.
Polygraph record of a representative trial of carotid body (CB) inhibition (dog 2). Perfusion begins at time 0 (solid vertical line). V̇i, ventilation; EMGdi, moving-time-averaged electromyogram of the costal diaphragm; Vt, tidal volume; BP, blood pressure; PetCO2, end-tidal Pco2; PetO2, end-tidal Po2; au, arbitrary units. Interruption in the BP trace is due to blood sampling. Note that the immediate hypoventilation and PetCO2 increase with CB inhibition persists for the duration of the trial.