Table. 3—

Sleep apnoea following 6 months of cardiac resynchronisation therapy(CRT)

Pre-CRTPost-CRT
Subjects n1010
Total AHI ·h−142.7±9.130.8±18.7
CSR events ·h−1*30.6±14.015.3±16.5
Obstructive AHI ·h−19.7±12.311.8±10.2
Mean Sa,O2,awake %93.6±1.093.9±0.7
Mean Sa,O2,sleep %93.3±1.193.3±1.1
Mean PCO2,tc,awake mmHg42.1±4.143.6±4.9
Mean PCO2,tc,sleep mmHg42.2±3.944.9±4.4
PB cycle length s63.6±16.259.1±9.6
LFCT s43.0±12.435.6±6.8#
  • Data are presented as mean±sd, unless otherwise stated. AHI: apnoea–hypopnoea index; CSR: Cheyne-Stokes respiration; Sa,O2: arterial oxygen saturation; PCO2,tc: transcutaneous partial pressure of carbon dioxide; PB: periodic breathing; LFCT: lung-to-finger circulation time. : includes mixed apnoeas in addition to CSR and obstructive apnoeas. *: p<0.05 versus pre-CRT; #: p = 0.09.