The Effects of Dexmedetomidine and Tracheal Intubation on Heart Rate Variability and QTc Interval

The purpose of this study is to investigate effect of dexmedetomidine and tracheal intubation on heart rate variability and QTc interval.

Inclusion Criteria:

• patient who are regarded as ASA class I
• age 20 to 60
• patient scheduled for Intubation for surgery

Exclusion Criteria:

• QTc interval > 440 ms
• arrythmia
• Patient who is taking a medicine which effects QTc interval
• HTN
• DM
• renal disease
• hepatic disease
• pregnant
• illiterate