Table 1

Patient Characteristics

All Patients (n = 257)
Age (yrs)66 ± 10
Gender (male/female)211/46
NYHA functional class (III/IV)232/25
Ischemic etiology148 (58%)
QRS duration (ms)161 ± 33
LBBB181 (70%)
SR/atrial fibrillation/paced208/29/30
LVEF (%)24 ± 7
LVEDV (ml)235 ± 86
LVESV (ml)182 ± 76
MR (moderate-to-severe)46 (18%)
LV dyssynchrony (ms)177 ± 117
Medication
 Anticoagulants225 (88%)
 Diuretics219 (85%)
 ACE inhibitors232 (90%)
 Beta-blockers176 (68%)
 Spironolactone114 (44%)

ACE = angiotensin-converting enzyme; LBBB = left bundle branch block; LV = left ventricular; LVEDV = left ventricular end-diastolic volume; LVEF = left ventricular ejection fraction; LVESV = left ventricular end-systolic volume; MR = mitral regurgitation; NYHA = New York Heart Association; SR = sinus rhythm.