This definition appears rarely
See other definitions of ABC
Samples in periodicals archive:
Pertussis in neonates; The diagnosis of pertussis was initially missed in all of the patients; Two neonates had apnea, bradycardia, cyanosis...
Apnea, bradycardia, and cyanosis during oral feeding in term neonates. 1985 May. Apnea, bradycardia; on apnoea, bradycardia and oxygen desaturation frequency.