RESULTS	In the morning under NOT , the heart rate-adjusted QT ( QTc ) interval was decreased compared with placebo ( mean difference , -25 milliseconds ; 95 % CI , -45 to -6 milliseconds ; P = .007 ) , and the interval between the peak and the end of the T wave on the ECG was shorter compared with acetazolamide ( mean difference , -11 milliseconds ; 95 % CI , -21 to -1 milliseconds ; P = .028 ) .\