QT and QTc dispersion in patients not taking and taking chronic β blocker treatment
| Chronic β blocker treatment | |||
|---|---|---|---|
| No | Yes | p Value 2-150 | |
| Number of patients | 108 | 17 | |
| QT dispersion (ms) | 53.2 (1.9) | 43.8 (4.9) | < 0.05 |
| QTc dispersion (ms−1−2) | 62.0 (2.4 ) | 48.2 (6.1 ) | 0.01 |
| SD-QT interval (ms) | 17.1 (0.7 ) | 14.2 (1.7) | < 0.05 |
| SD-QTc interval (ms−1−2) | 20.1 (0.9 ) | 15.6 (2.2 ) | < 0.05 |
| Ad.QT dispersion (ms) | 16.8 (0.6 ) | 13.7 (1.5 ) | < 0.05 |
| Ad.QTc dispersion (ms−1−2) | 19.6 (0.8) | 15.0 (1.9 ) | < 0.01 |
↵2-150 Analysis of variance adjusted for the factors and covariates in the multiple regression.
Ad. QT dispersion, “lead adjusted” QT dispersion; Ad. QTc dispersion, “lead adjusted” QTc dispersion; SD-QT interval, standard deviation of QT interval; SD-QTc interval, standard deviation of the rate corrected QT interval.