ECG effects of anesthetic agents

Anesthetic agent*	ECG effects
Volatile inhaled agents	QT interval: Slight prolongation
Dexmedetomidine	QT interval: Slight prolongation SA and AV nodes: Slight depression in function
Opioids:
Sufentanil	QT interval: Slight prolongation
Fentanyl	QT interval: Slight prolongation
Remifentanil	SA node: Depression in function with possible bradycardia
Midazolam	QT interval: Slight prolongation
Etomidate	QT interval: Slight prolongation or no effect
Ketamine	QT interval: Variability in duration
Bupivacaine	QT interval: Slight increase

ECG: electrocardiogram; SA: sinoatrial; AV: atrioventricular.
* Propofol and neuromuscular blocking agents have no known effects on the ECG.

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