Key result
Right stellate ganglion block followed by head-up tilt significantly increased QT interval, QTc interval, and QTcD, whereas left SGB did not induce these increases.
Why the study?
Does head-up tilt after right or left stellate ganglion block affect QT interval and QT dispersion in healthy volunteers?
Population
10 healthy volunteers
Comparison
Right and left stellate ganglion blocks using 7… vs Baseline measurements before SGB and comparison…
Design
Other
Follow-up
15 minutes after head-up tilt
Authors
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May warrant arrhythmia caution with right SGB plus tilt; leaves open clinical relevance and need for larger confirmatory studies.
Does head-up tilt after right or left stellate ganglion block affect QT interval and QT dispersion in healthy volunteers?
Right stellate ganglion block followed by head-up tilt significantly increases QT interval and dispersion, potentially increasing the risk of ventricular arrhythmias, an effect not seen with left SGB.
Katsunori Fujii (2004) studied Healthy volunteers (n=10). Right or left stellate ganglion block (SGB) followed by head-up tilt vs. Baseline (before head-up tilt) and contralateral SGB was evaluated on RR interval, QT interval, QTc interval, QT dispersion (QTD), and QTcD. Right stellate ganglion block followed by head-up tilt significantly increased QT interval, QTc interval, and QTcD, whereas left SGB did not induce these increases.
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