Overall, 309 patients (18.4%) had an arrhythmia;
the most common type of arrhythmia was atrial
fibrillation, which occurred in 266 patients (86.1%).
More patients had an arrhythmia, especially atrial
fibrillation, in the dopamine group than in the
norepinephrine group (Table 3). The study drug
was discontinued in 65 patients owing to severe