Table. 2—

Polysomnography following cardiac resynchronisation therapy(CRT)

Pre-CRT non-SA patientsPre-CRT CSR patientsPost-CRT CSR patients
Subjects n121010
TST h5.1±0.94.6±1.55.0±1.1
Sleep efficiency %74.4±12.565.1±21.169.2±13.4
Sleep latency min23.2±28.513.1±8.327.2±24.9
WASO min83±40135±91104±52
Stage 1 % TST*8±920±1321±15
Stage 2 % TST62±1358±959±11
SWS % TST18±119±76±6
REM sleep % TST12±713±714±7
PLM index ·h−136±4115±2427±38
PLM arousal index ·h−19±133±46±9
Respiratory arousal index ·h−1*2±226±925±16
Spontaneous arousal index ·h−15±34±45±6
Total arousal index ·h−1*15±1632±1136±13
Awakening index ·h−16±512±1010±6
  • Data are presented as mean±sd. SA: sleep apnoea (includes patients with obstructive sleep apnoea and Cheyne-Stokes respiration (CSR)); TST: total sleep time; WASO: wakefulness after sleep onset; SWS: slow-wave sleep; REM: rapid eye movement; PLM: periodic limb movement. *: p<0.05 between non-SA patients and CSR patients.