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(a) An apnea event detected by the monitor. The respiration rate falls to 0.1 breaths per minute, and then jumps to zero. (b) An apnea event not detected by the monitor. The measured respiration rate equals the heart rate during the apnea. (b) Periodic breathing. The monitor shows cyclic rise and fall of respiration rate, while the new apnea detector shows periodic cessation of breathing.
