Table. 4—

Cardiac function before and 6 months after cardiac resynchronisation therapy(CRT)

Pre-CRTPost-CRT
Subjects n1010
LVEF* %19.0±4.224.2±7.8
LV grade* 2/3/40/3/71/5/3
NYHA class* I/II/III/IV0/1/7/22/6/2/0
6-min walk*333±84376±100
LVEDD cm7.25±0.717.06±0.95
Mitral regurgitation* mild/mod./severe3/4/38/2/0
Mean heart rate awake68±867±12
Max. heart rate awake92±1888±18
Min. heart rate awake46±1050±7
Mean heart rate sleep66±966±12
Min. heart rate sleep47±750±12
Max. heart rate sleep83±1582±14
  • Data are presented as n or mean±sd. LVEF: left ventricular ejection fraction; LV: left ventricle; NYHA: New York Heart Association; LVEDD: left ventricular end-diastolic dimension; mod.: moderate; max.: maximum; min.: minimum. *: p<0.05 versus pre-CRT.