PMC

Study selection process.

Dispersion of QTc interval duration before, during, or after the perioperative torsade de pointes event (n=45). QTcB = heart-rate corrected QT interval using Bazett’s formula. Box plots indicate the 25^th and 75^th percentile; the whiskers reflects the median and the error bars indicate the Tukey’s distance (1.5 times the interquartile distance).