highly significantP -value = 0.002
When we compared between AF, supraventricular tachycardia and sinus rhythm data in both groups,the results showed that there were highly significant differences between preoperative and postoperative regarding AF in group I (Chi-square test = 3.16, P -value = 0.002), supraventricular tachycardia in group I (Chi-square test = 2.11, P -value = 0.02), supraventricular tachycardia in group II (Chi-square test = 2.62, P -value = 0.006) and sinus rhythm in group I (Chi-square test = 5.62, P -value = 0.0003) (Table 4 ).