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Korean J Anesthesiol > Volume 57(6); 2009 > Article
Korean Journal of Anesthesiology 2009;57(6):737-741.
DOI: https://doi.org/10.4097/kjae.2009.57.6.737   
Effect of remifentanil on QT dispersion.
Wonjin Lee, Young Hwan Kim, Kwang Rae Cho, Sang Eun Lee, Jeong Han Lee, Se Hun Lim, Kun Moo Lee, Soon Ho Cheong, Young Kyun Choe, Young Jae Kim, Chee Mahn Shin
Department of Anesthesiology and Pain Medicine, Busan Paik Hospital, College of Medicine, Inje University, Busan, Korea. anehero@naver.com
QT dispersion (QT(d)) is an indirect measure of the heterogeneity of ventricular repolarization and can be used as a risk factor for complex ventricular arrhythmias. We measured the effect of remifentanil on QT(d) and heart-rate corrected QT dispersion (QT(cd)). METHODS: Sixty ASA class I and II patients, who were between 20 and 60 years old, and who were scheduled for general anesthesia, were studied. After the patient entered the operating room, a 12 lead EKG recording was taken and intravenous infusion of remifentanil was started. The infusion rate was 0.1 microg/kg/min in group 1 and 0.2 microgram/kg/min in group 2. Another EKG recording was taken 10 minutes after infusion had started. RESULTS: In both groups, QT(d) following remifentanil infusion was not significantly different than control values (76.6 +/- 23.3 ms vs 81.8 +/- 34.9 ms, P = 0.459 in group 1; 70.7 ms +/- 29.7 ms vs 73.7 ms +/- 37.1 ms, P = 0.734 in group 2). Neither was QT(cd): (83.2 ms +/- 25.2 ms vs 89.6 ms +/- 36.2 ms, P = 0.371 in group 1; 81.0 ms +/- 35.2 ms vs 83.4 ms +/- 40.9 ms, P = 0.829 in group 2). CONCLUSIONS: Remifentanil infusion at a rate less than 0.2 microg/kg/min does not change QT(d) or QT(cd).
Key Words: Arrhythmia; Heart conduction system; Remifentanil


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