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Table 1 Parameters during polysomnography without and with the use of automatic positive airway pressure therapy in two cases after post COVID-19

From: Newly detected rapid eye movement associated sleep apnea after coronavirus disease 2019 as a possible cause for chronic fatigue: two case reports

  Case 1 Case 2
Parameter Without APAP With APAP Without APAP With APAP
Apnea–hypopnea index 5.2 0.0 6.2 0.0
Number of hypopnea events during REM phase 22 0 13 0
Number of hypopnea events during non-REM phase 6 0 8 1
Hypopnea index during REM phase (events/hour) 36.8 0.0 19.5 0.0
Hypopnea index during non-REM phase (events/hour) 1.2 0.0 1.4 0.2
Maximum duration of hypopnea during REM phase, seconds 54.0 0 26.5 0
Maximum duration of hypopnea during non-REM phase, seconds 29.0 0 29.5 17.0
Mean duration of hypopnea during REM phase, seconds 25.7 0 15.2 0
Mean duration of hypopnea during non-REM phase, seconds 16.6 0 13.0 17.0
Arousals, n 137 48 46 43
SpO2 nadir during REM phase, % 90 96 85 88
Maximum heart rate during REM phase, beats per minute 68 60 77 68
  1. APAP automatic positive airway pressure, REM rapid eye movement, SpO2 oxygen saturation