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Comparison of ECG measures before and after therapy (N = 248)
| Before therapya | After therapya | P-value | |
|---|---|---|---|
| ΣQRS(6 L) (mV) | 4.2 (3.2–5.0) | 3.9 (3.2–4.9) | 0.01 |
| QTc (ms) | 427.0 ± 20.9 | 431.2 ± 25.5 | 0.02 |
aData presented as median (interquartile range) or mean ± standard deviation
ΣQRS(6 L): sum of QRS amplitudes in 6 electrocardiogram limb leads, QTc: corrected QT interval
