Study | AVID[2] | CASH[3] | CIDS[4] | NCDR Cohort[5] |
Years | 1993 to 1997 | 1987 to 1998 | 1990 to 1997 | 2006 to 2009 |
Patients | 1016 | 191 | 659 | 46,685 |
Mean age (years) | 65±11 | 58±11 | 63±9 | 66±14 |
Male (%) | 78 | 79 | 85 | 73 |
Follow-up (months) | 18±12 | 57±34 | 36 | None |
CAD (%) | 81 | 73 | 83 | 64 |
Nonischemic (%) | 15 | 12 | 10 | 23 |
LVEF | 32±13 | 46±19 | 34±14 | 36±15 |
Presenting arrhythmia (%) | ||||
VF | 45 | 100 | 45 | 51 |
VT with LOC | 21 | 0 | 16 | NR |
VT without LOC | 34 | 0 | 24 | 27 |
Syncope | 0 | 0 | 15 | 22 |
BB (%) | 42 | 0 | 33 | 84 |
ACE-I/ARB (%) | 69 | 45 | NR | 72 |
One-year mortality (%): Control/ICD | 17.7/10.7 | 15.2/8.1 | 11.2/9.5 | NA/10.4 |
Two-year mortality (%): Control/ICD | 25.3/18.4 | 27.2/17.2 | 21.0/14.8 | NA/16.4 |
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