Analysis of electrocardiographic parameters
ECG interval measurements were made manually, and based on the average of 4 successive ECG complexes for each recording time point. The QRS interval was measured from the onset of the Q wave (or R wave if no Q was visible) to the point at which the ST segment bisected the isoelectric line. The QT interval was corrected (QTc) using Bazett’s formula (Bazett, 1920).