Abstract:
BACKGROUND:Many studies focusing on the effects of local anaesthetics on QT intervals have been performed, but the articles evaluating the relationship between thoracic epidural anaesthesia combined with general anaesthesia and QT parameters are very limited. AIMS:We aimed to compare the effects of bupivacaine and ropivacaine on QT interval, corrected QT, dispersion of QT, and corrected dispersion of QT in patients undergoing lung resection under thoracic epidural anaesthesia combined with general anaesthesia. STUDY DESIGN:Prospective clinical study. METHODS:Thirty ASA physical status 1-3 patients requiring thoracic epidural anaesthesia combined with general anaesthesia for thoracic surgery. Patients were randomly assigned to two groups, which were allocated to receive either bupivacaine (Group B) or ropivacaine (Group R) during thoracic epidural anaesthesia. Following haemodynamic monitoring, a thoracic epidural catheter was inserted. Local anaesthetic at an average dose of 1.5 mL/ segment was given through an epidural catheter. The same general anaesthesia protocol was administered in both groups. Records and measurements were performed on 10 phases that were between the thoracic epidural catheter insertion to the 5(th) min of endobronchial intubation. In all phases, systolic arterial pressure, diastolic arterial pressure, mean arterial pressure, heart rate, peripheral O2 saturation, and electrocardiogram monitoring were performed in patients. All QT parameters were recorded by 12-lead electrocardiogram and analysed manually by a cardiologist. RESULTS:QT intervals were similar between two groups. In Group R, corrected QT values at the 20(th) min of local anaesthetic injection and the 5(th) min of endobronchial intubation were shorter than those in Group B (p<0.05). The basal dispersion of QT and dispersion of QT values at the 1(st) min of propofol injection were shorter than those in Group R (p<0.05). The corrected dispersion of QT value at the 1(st) min of propofol injection was shorter in Group R (p<0.05). In Group R, the decrease in mean arterial pressure at the 1st min of fentanyl injection was significant compared with Group B (p<0.05). There was no significant difference between the groups with respect to heart rate and complications. CONCLUSION:The corrected QT, dispersion of QT, and corrected dispersion of QT intervals were slightly longer in the patients receiving bupivacaine compared with those receiving ropivacaine in various phases of the present study.
journal_name
Balkan Med Jjournal_title
Balkan medical journalauthors
Güven O,Sazak H,Alagöz A,Savkılıoğlu E,Demirbaş CS,Yıldız A,Karabulut Edoi
10.5152/balkanmedj.2013.9275subject
Has Abstractpub_date
2013-12-01 00:00:00pages
410-4issue
4eissn
2146-3123issn
2146-3131pii
bmj-30-4-410journal_volume
30pub_type
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