Risk factors and incidence of VA in patients with TOF
| No VA (n=113) | VA (n=35) | P value | OR | P value | |
| Age at operation, years | 4.6±4.5 | 4.6±0.2 | 0.94 | ||
| QRS duration, ms | 136±27 | 147±34 | 0.06 | ||
| NYHA class | 1 (1–3) | 1 (1–3) | 0.55 | ||
| Exercise capacity, W | 151±38 | 151±33 | 0.97 | ||
| Operations, no | 0.8±0.9 | 1.0±0.8 | 0.26 | ||
| RV FAC, % | 48.5±6.9 | 47.3±7.5 | 0.44 | ||
| RV D1, cm | 4.3±0.5 | 4.6±0.6 | 0.01 | 2.4 (1.2 to 5.0) 2.8 (1.1 to 6.9) | 0.01 0.025 |
| RVOT, cm | 2.9±0.4 | 2.9±0.5 | 0.86 | ||
| LV EF, % | 55±8 | 50±9 | 0.02 | 0.94 (0.90 to 0.99) | 0.02 |
| LV MD, ms | 44±14 | 49±16 | 0.09 | ||
| LV GLS, % | −17.7±3.3 | −16.5±3.9 | 0.09 | ||
| RV MD, ms | 37±22 | 42±17 | 0.22 | ||
| RV GLS, % | −18.1±4.0 | −16.1±4.8 | 0.04 | 1.1 (1.0 to 1.2) | 0.03 |
GLS, global longitudinal strain; LV, left ventricular; LVEF, left ventricular ejection fraction; MD, mechanical dispersion; RV, right ventricular; RVD1, right ventricular basal diameter; RVFAC, right ventricular fractional area change; RVOT, right ventricular outflow tract; TOF, tetralogy of Fallot; VA, ventricular arrhythmias.