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42  Stratos LV/LV-T Technical Manual   
Table 9: Patient Demographics 
Characteristic 
Results 
Age at Implant (Years) 
n=88 
Mean ± SD 
68 ± 10 
Range 
34 to 84 
Gender n=89 
Male 66 
(74%)
Female 23 
(26%)
QRS-width (ms) 
n=70 
Mean ± SD 
160 ± 23 
Range 
110 to 210 
Etiology of Heart Failure 
n=87 
Ischemic 32 
(37%)
Non-Ischemic 55 
(63%)
New York Heart Association (NYHA) 
Classification 
n=87 
Class III 
73 (84%)
Class IV 
14 (16%)
Atrial Tachyarrhythmias 
N=87 
None 48 
(55%)
Atrial flutter 
5 (5.7%) 
Paroxysmal atrial fibrillation 
19 (22%)
Persistent atrial fibrillation 
10 
(11.5%) 
Other 5 
(5.7%) 
Ventricular Tachyarrhythmias 
N=87 
None 80 
(92%)
Ventricular fibrillation 
Sustained or non-sustained VT 
5 (5.7%)
1)
Other VT 
2 (2.3%)
2)
Existing/chronic leads prior to Corox 
OTW/Steroid 
n=88 
None 73 
(83%)
Yes, due to previous pacemaker therapy 
15 (17%)
1)
 non-sustained VT (n=4); no further information available (n=1); 
2)
 VES (n=2)