Table 2.
Comparison of time to peak myocardial sustained systolic velocity (Ts) (in ms) between patients with fQRS and without fQRS.
| Segment | Fragmented QRS (n = 50) | Normal QRS (n = 50) | p value |
|---|---|---|---|
| Basal septal | 158.52 ± 37.86 | 160.26 ± 33.09 | 0.80 |
| Mid septal | 156.24 ± 37.56 | 160.80 ± 33.75 | 0.52 |
| Basal lateral | 177.28 ± 49.88 | 164.88 ± 34.25 | 0.15 |
| Mid lateral | 182.18 ± 49.23 | 164.16 ± 32.79 | 0.03* |
| Basal inferior | 187.48 ± 48.44 | 169.64 ± 32.64 | 0.03* |
| Mid inferior | 188.18 ± 47.05 | 169.08 ± 29.24 | 0.01* |
| Basal anterior | 177 ± 47.21 | 161.36 ± 28.38 | 0.048* |
| Mid anterior | 183.24 ± 50.14 | 162.18 ± 29.55 | 0.01* |
| Basal posterior | 172.16 ± 40.25 | 167.08 ± 29.08 | 0.47 |
| Mid posterior | 173.76 ± 45.23 | 169.84 ± 31.05 | 0.61 |
| Basal anteroseptal | 170.04 ± 37.11 | 162.94 ± 26.94 | 0.27 |
| Mid anteroseptal | 169.7 ± 38.52 | 169.90 ± 34.23 | 0.98 |
| Ts-SD (Yu index) | 35.64 ± 12.79 | 20.45 ± 11.17 | <0.001* |
| Yu index positive patient n (%) | 39 (78%) | 7 (14%) | 0.000005* |
Data are as mean ± SD; Ts Max- Time to peak systolic velocity for the most delayed segment; Ts-SD- Standard deviation of all 12 Ts values. *Statistically significant difference in values between two groups.