Introduction
Materials and methods
Study population and laboratory analysis
All | 64-line | 320-line | p value | |
---|---|---|---|---|
n | 606 | 410 (68%) | 196 (32%) | – |
Male | 408 (67%) | 268 (65%) | 140 (71%) | 0.137 |
Age (years) | 69 ± 9.0 | 69 ± 9.2 | 68 ± 8.4 | 0.075 |
Body mass index (kg/m2) | 23.1 ± 3.5 | 23.3 ± 3.5 | 22.8 ± 3.6 | 0.146 |
Body surface area (m2) | 1.68 ± 0.19 | 1.67 ± 0.19 | 1.69 ± 0.17 | 0.082 |
CHADS2 score | 2.05 ± 1.29 | 2.04 ± 1.30 | 2.07 ± 1.29 | 0.791 |
0 | 56 (9%) | 38 (9%) | 18 (9%) | 0.981 |
1 | 163 (27%) | 110 (27%) | 53 (27%) | 0.941 |
2 | 200 (33%) | 140 (34%) | 60 (31%) | 0.332 |
3 | 108 (18%) | 70 (17%) | 38 (19%) | 0.432 |
4 | 47 (8%) | 32 (8%) | 15 (8%) | 0.955 |
≥ 5 | 32 (5%) | 20 (5%) | 12 (6%) | 0.430 |
Congestive heart failure | 293 (48%) | 188 (46%) | 105 (54%) | 0.243 |
Hypertension | 424 (70%) | 287 (70%) | 137 (70%) | 0.899 |
Age (≥ 75 years old) | 164 (27%) | 122 (33%) | 42 (21%) | 0.053 |
Diabetes mellitus | 158 (26%) | 107 (26%) | 51 (26%) | 0.941 |
History of CVA/TIA | 103 (17%) | 66 (16%) | 37 (19%) | 0.255 |
Dyslipidemia | 200 (33%) | 135 (33%) | 65 (33%) | 0.951 |
Ex or current smoking | 170 (28%) | 115 (28%) | 55 (28%) | 0.977 |
Type of atrial fibrillation | ||||
Paroxysmal | 369 (61%) | 240 (59%) | 129 (66%) | 0.086 |
Persistent | 209 (33%) | 146 (36%) | 62 (32%) | 0.336 |
Long-lasting | 29 (5%) | 24 (6%) | 5 (3%) | 0.075 |
Laboratory analysis | ||||
Serum creatinine (mg/dl) | 0.89 ± 0.24 | 0.89 ± 0.24 | 0.90 ± 0.23 | 0.409 |
Left-ventricular ejection fraction (%) | 63 ± 9.9 | 63 ± 9.1 | 64 ± 11 | 0.268 |
Diameter of left atrium (mm) | 39 ± 6.7 | 39 ± 6.6 | 39 ± 6.7 | 0.309 |
Parameters during CT imaging | ||||
Heart rate (bpm) | 66 ± 15 | 66 ± 15 | 66 ± 16 | 0.829 |
Sinus rhythm | 398 (66%) | 261 (64%) | 137 (70%) | 0.131 |
Medications during CT imaging | ||||
Beta-blocker (%) | 421 (69%) | 293 (71%) | 128 (65%) | 0.124 |
Minor tranquilizer (%) | 172 (28%) | 119 (29%) | 52 (27%) | 0.524 |
Computed tomography
Evaluation of coronary artery lesions by cardiac CT and the detection of myocardial ischemia
Statistical analysis
Results
Patient characteristics and laboratory analysis (Table 1)
Evaluation of the coronary artery lesions and myocardial ischemia (Tables 2, 3)
All | 64-line | 320-line | p value | |
---|---|---|---|---|
Number of patients | 606 | 410 (68%) | 196 (32%) | – |
Coronary arterial stenosis | ||||
Evaluable coronary artery lesions | 562 (93%) | 381 (93%) | 181 (92%) | 0.809 |
Mild-to-moderate (≤ 50%) | 418 (69%) | 283 (69%) | 135 (69%) | 0.801 |
Severe (> 50%) | 144 (24%) | 98 (24%) | 46 (23%) | 0.818 |
Unevaluable coronary artery lesions | ||||
Severe coronary calcification | 41 (7%) | 26 (6%) | 15 (8%) | 0.548 |
Banding artifacts | 3 (0.5%) | 3 (0.7%) | 0 (0%) | 0.231 |
Evaluation of myocardial ischemia | |
Number of patients | 188 (31%) |
Exercise stress testing | 180 (30%) |
201Tl scintigraphy | 82 (14%) |
Fractionated flow reserve | 62 (10%) |
Detection of myocardial ischemia | |
Number of patients | 54 (9%) |