Table 1

Baseline Characteristics

Single ChamberControl Arm
(n = 278, 51%)
Long Detection Arm
(n = 267, 49%)
Patient demographics
 Age, yrs62 (12)62 (13)
 Male238 (86)228 (85)
Medical history
 Secondary prevention90 (32)85 (32)
 VF/ventricular flutter35 (13)27 (10)
 Sustained VT history62 (22)48 (18)
 Permanent atrial fibrillation37 (13)41 (15)
 NYHA functional class III or IV63 (23)6 (23)
 Angina37 (14)27 (10)
 Coronary artery disease181 (65)190 (71)
 Previous revascularization113 (41)134 (50)
 QRS, ms109 (27)105 (24)
 LBBB30 (11)36 (13)
 Hypercholesterolemia149 (54)145 (55)
 Diabetes83 (30)77 (29)
 Chronic kidney disease33 (12)29 (11)
Baseline echocardiographic measures
 Moderate/severe mitral regurgitation32 (20)26 (16)
 LVEF, %31 (11)31 (10)
 LVDD, mm62 (10)61 (9)
Baseline medical therapy
 ACE inhibitor/ARB219 (79)212 (79)
 Antiarrhythmic drug43 (15)38 (14)
 Beta-blocker232 (83)227 (85)
 Diuretic205 (73)181 (68)
 Antiplatelet157 (56)175 (66)
 Anticoagulant96 (35)78 (29)
 Cardiac glycoside44 (16)35 (13)
 Hypolipidemic168 (60)163 (61)
 Nitrate47 (17)37 (14)
 Other cardiac medications36 (13)15 (6)

Values are n (%).

ACE = angiotensin-converting enzyme; ARB = angiotensin II receptor blocker; LBBB = left bundle branch block; LVDD = left ventricular diastolic diameter; LVEF = left ventricular ejection fraction; NYHA = New York Heart Association; VF = ventricular fibrillation; VT = ventricular tachycardia.

  • p < 0.05.