Key result
Duration of surgery correlated with QTc prolongation in patients exposed to volatile anesthetics (r=0.228, p=0.010), but not in those receiving regional or monitored anesthesia care.
Why the study?
Does the duration of surgery correlate with QTc interval prolongation in patients undergoing general anesthesia with volatile anesthetics compared to regional anesthesia or MAC?
Observational
Does the duration of surgery correlate with QTc interval prolongation in patients undergoing general anesthesia with volatile anesthetics compared to regional anesthesia or MAC?
Effect estimate: r=0.228
p-value: p=0.010
Duration of surgery is a significant risk factor for QTc interval prolongation in patients receiving general anesthesia with volatile anesthetics, highlighting the need for careful ECG monitoring during prolonged procedures.
May warrant QTc monitoring during prolonged volatile anesthesia; observational data leaves open causality and need for prospective confirmation.
Background: Prolongation of the QT interval signals disordered cardiac repolarization which poses a significant risk to patients undergoing surgical procedures under anesthesia. Methods: This study analyzed the demographic, clinical, and pharmacological factors in relation to QT interval prolongation under different types of anesthesia. This prospective observational study compared demographic characteristics, clinical and pharmacological factors from patients who demonstrated a prolonged QTc interval under GA (general anesthesia) and in those who had QTc interval prolongation while receiving RA (regional) or MAC (monitored anesthesia care). Results: Duration of surgery correlated strongly with QTc interval prolongation in patients who were exposed to volatile anesthetics (r=.228, p=.010), but not in patients who received RA/MAC (r=.121, p=.444).
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Beverly Waxler (2012) conducted an observational in Surgical procedures under anesthesia. General anesthesia with volatile anesthetics vs. Regional anesthesia (RA) or monitored anesthesia care (MAC) was evaluated on Correlation between duration of surgery and QTc interval prolongation (r=0.228, p=0.010). Duration of surgery correlated with QTc prolongation in patients exposed to volatile anesthetics (r=0.228, p=0.010), but not in those receiving regional or monitored anesthesia care.
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