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Thorax 59:174-176 doi:10.1136/thorax.2003.007799
  • Case Report

Elimination of central sleep apnoea by mitral valvuloplasty: the role of feedback delay in periodic breathing

Table 1

Sleep parameters

Total sleep time (min) Apnoea/hypopnoea index (AHI) (apnoeas + hypopnoeas/h sleep)* Apnoea duration (s) Baseline Sao2 (%)† Mean low Sao2 (%)‡
Central Mixed Obstructed
*Non-REM sleep.
†Initial baseline value only.
‡Minimum Sao2 in the absence of apnoea.
Study 1: baseline 228 34 15 5 30 (9) 98 (1.6) 93 (1.8)
Study 2: breathing O2 157 8 15 7 34 (9) 98 (1.0) 96 (1.9)
Study 3: after mitral valvuloplasty 273 0 0 0 – 96

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