Table 1.
Characteristics of the patients
| NSVT (n = 179) | No NSVT (n = 90) | P value | |
|---|---|---|---|
| Age (y) | 64.9 ± 12.1 | 66.1 ± 11.0 | .436 |
| Male | 141 (78.8) | 64 (71.1) | .164 |
| Underlying heart disease | |||
| Ischemic | 37 (20.7) | 33 (36.7) | .0048 |
| Nonischemic | 142 (79.3) | 57 (63.3) | |
| LVEF (%) | 25.6 ± 9.0 | 28.0 ± 9.9 | .046 |
| LVEF ≦30% | 134 (74.9) | 62 (68.9) | .299 |
| NYHA class | |||
| I | 1 (0.6) | 3 (3.3) | .267 |
| II | 44 (24.6) | 26 (28.9) | |
| III | 117 (65.4) | 53 (58.9) | |
| IV | 17 (9.5) | 8 (8.9) | |
| Heart rate (/min) | 72.1 ± 16.6 | 69.2 ± 14.7 | .162 |
| QRS duration (ms) | 149.0 ± 32.7 | 152.9 ± 27.9 | .338 |
| QT interval (ms) | 445.8 ± 53.4 | 454.2 ± 52.7 | .226 |
| Atrial lead | |||
| Absent | 29 (16.2) | 9 (10.0) | .168 |
| Present | 150 (83.8) | 81 (90.0) | |
| AF | 26 (14.5) | 12 (13.3) | .791 |
| Diabetes mellitus | 45 (25.1) | 31 (34.4) | .110 |
| Hypertension | 64 (35.8) | 44 (48.9) | .038 |
| Dyslipidemia | 57 (31.8) | 34 (37.8) | .332 |
| Hyperuricemia | 34 (19.0) | 18 (20.0) | .844 |
| Cerebral infarction | 14 (7.8) | 8 (8.9) | .763 |
| Peripheral artery disease | 3 (1.7) | 5 (5.6) | .077 |
| BNP (pg/mL)a | 690.1 ± 706.4 | 474.5 ± 567.6 | .017 |
| Hemoglobin (g/dL) | 13.2 ± 1.9 | 12.8 ± 1.9 | .196 |
| Creatinine (mg/dL) | 1.28 ± 0.99 | 1.41 ± 1.69 | .415 |
| Goldenberg scoreb | 2.2 ± 1.1 | 2.3 ± 1.1 | .501 |
LVEF, left ventricular ejection fraction; AF, atrial fibrillation.
Values are means ± SD, or number (%).
a
The value of BNP was missing in 15 patients with NSVT and 8 patients without NSVT.
b
The original risk score model comprised 5 clinical factors including (i) NYHA class > II, (ii) AF, (iii) QRS duration >120 ms, (iv) age >70 years, and (v) blood urea nitrogen (BUN) >26 mg/dL. Because BUN was not collected in the JCDTR database, blood creatinine >1.5 mg/dL was used as a risk factor instead of BUN.