Table 2

Relative changes in echocardiographic and exercise-related variables in patients with or without echocardiographic response, before and 3 months after CRT implantation

VariableNon-responder (n=11)Responder (n=20)
Baseline3 monthsBaseline3 months
EF (%)24.5±8.624.7±8.027.7±7.740.5±8.8*
EDV (mL)289±105287±101221±72171±52*
ESV (mL)223±102218±92161±59†106±45*
P peak (W)97±35102±39107±47118±47*
VO2 peak (mL/kg/min)14.8±3.916.0±3.217.3±6.119.7±6.6*
VE/VCO2 slope38.9±9.937±6.134.9±8.431.7±7.0*
τVO2 on (s)87.2±39.190.1±48.858.6±34.255.4±32.2
τVO2 rec (s)79.5±21.467.0±19.475.0±47.357.6±17.3
  • Values presented as mean±SD.

  • *p<0.05 for within-group difference.

  • †p<0.05 for between group difference at baseline.

  • CRT, cardiac resynchronisation therapy; EDV, end-diastolic volume; EF, ejection fraction; ESV, end-systolic volume; OUES, oxygen uptake efficiency slope; P, performance; VE/VCO2 slope, minute ventilation for CO2 elimination; τVO2, time constant of oxygen uptake.