Table 1.

Demographic Characteristics

Patient Characteristic	Implanted Patients (n=30)	Nonimplanted Patients (n=18)	P
Age, mean (SD), y	64 (9)	65 (15)	0.75
Male, n (%)	26 (87)	14 (78)	0.45
NYHA class, n (%)			0.86
I	0/30 (0)	0/18 (0)
II	6/30 (20)	3/18 (17)
III	22/30 (73)	15/18 (83)
IV	2/30 (7)	0/18 (0)
6 MWD, mean (SD), m	307 (87)	284 (104)	0.42
Medical history, n/N (%)
COPD	6/28 (21)	5/17 (29)	0.72
CAD	25/30 (83)	10/18 (56)	0.05
CABG	11/30 (85)	6/18 (56)	0.55
HF admissions in past 12 mo, mean (SD), n	1.2 (1.5)	1.5 (1.7)	0.57
Medications, n (%)
Diuretics	25/30 (83)	17/18 (94)	0.39
ACE inhibitor/ARB	27/30 (90)	18/18 (100)	0.28
β-Blocker	29/30 (97)	17/18 (94)	1.00
Echocardiographic parameters, mean (SD)
LVEDD, cm	6.7 (0.75)	6.6 (0.94)	0.83
Mitral annular diameter, cm	4.2 (0.4)	3.96 (0.45)	0.06
LVEF, mean (SD), %	30 (8)	29 (8)	0.59

6 MWD indicates 6-minute walk distance; COPD, chronic obstructive pulmonary disease; CAD, coronary artery disease; CABG, coronary artery bypass graft; ACE, angiotensin-converting enzyme; ARB, angiotensin receptor blocker; LVEDD, left ventricular end-diastolic diameter; and LVEF, left ventricular ejection fraction.