Table 2

Comparison of Clinical Status Before and 3 Months After CCM Therapy

  Baseline3 Monthsp Value
Heart rate (beats/min)77 ± 1574 ± 120.257
24-h PVC1,259 ± 2,1091,440 ± 1,5220.337
Systolic blood pressure (mm Hg)120 ± 22122 ± 230.594
Diastolic blood pressure (mm Hg)75 ± 1375 ± 150.881
NYHA functional class (% patients)
 II—83<0.001
 III10017
MLWHF quality of life score23 ± 1920 ± 180.577
6-min hall walk (m)331 ± 85358 ± 830.015
Vo2 max (ml/kg/min)15.9 ± 4.714.3 ± 4.60.059
Maximal exercise (METs)4.5 ± 1.44.0 ± 1.30.060

MET = metabolic equivalent; MLWHF = Minnesota Living With Heart Failure; PVC = premature ventricular contraction; other abbreviations as in Table 1.