Approximately 15-seconds of data are shown at baseline (BL), and 2-, 15-, 30-, and 60-minutes following CX717 administration. Note the sustained and bilateral increase in inspiratory phrenic burst amplitude. Panels a (baseline) and b (60-minutes post-CX717) provide expanded time scale traces taken from the areas indicated by the gray box. ETCO2 = end-tidal CO2, HR = heart rate; ABP = arterial blood pressure (ABP), RR = respiratory rate; ʃPhr = integrated phrenic signal; CL = contralateral to C2Hx; IL = ipsilateral to C2Hx. The phrenic nerve burst amplitude can be considered as arbitrary units (au).