Effects of Sympathetic Stimulation on Various Repolarization Indices in the Congenital Long QT Syndrome
Why the study?
Does sympathetic stimulation modulate repolarization indices differentially across congenital Long QT Syndrome genotypes?
Population
Patients with congenital Long QT Syndrome and experimental models
Comparison
Sympathetic stimulation vs Baseline or normal conditions
Design
Review
Authors
Discussion
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Overview
This review highlights how sympathetic stimulation differentially affects transmural dispersion of repolarization across LQT1, LQT2, and LQT3 genotypes, providing a mechanistic basis for their varying arrhythmogenic sensitivities.
Structured PICO
Does sympathetic stimulation modulate repolarization indices differentially across congenital Long QT Syndrome genotypes?
P
Population
Patients with congenital Long QT Syndrome (LQT1, LQT2, and LQT3) and experimental models (arterially-perfused ventricular wedge preparations)
I
Intervention
Sympathetic stimulation (isoproterenol or epinephrine infusion)
C
Comparator
Baseline or normal conditions
O
Outcome
Repolarization indices in the ECG (Q-Tend, Q-Tpeak, Tpeak-end interval) and cellular action potentialssurrogate
This review highlights how sympathetic stimulation differentially affects transmural dispersion of repolarization across LQT1, LQT2, and LQT3 genotypes, providing a mechanistic basis for their varying arrhythmogenic sensitivities.
Cite This Study
Wataru Shimizu (2002) studied this question.