First quartile ≤23.3 ms | Second quartile 23.4–26.2 ms | Third quartile 26.3–28.7 ms | Fourth quartile >28.7 ms | P value | |
All VT/VF/SCD, n(%) | 13/23 (57) | 12/23 (52) | 14/23 (61) | 8/22 (36) | 0.38 |
All AF, n(%) | 6/23 (27) | 7/23 (30) | 8/23 (35) | 4/22 (18) | 0.64 |
HF, n(%) | 3/23 (13) | 1/23 (4) | 8/23 (35) | 5/22 (23) | 0.05 |
AF, atrial fibrillation/flutter; HF, heart failure; SCD, sudden cardiac death; VF, ventricular fibrillation; VT, ventricular tachycardia.