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2016 ; 8
(2
): 385-93
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Pharmacogenetics of Potassium Channel Blockers
#MMPMID27261829
Roden DM
Card Electrophysiol Clin
2016[Jun]; 8
(2
): 385-93
PMID27261829
show ga
The QT interval on surface electrocardiograms provides a model of a
multicomponent integrated readout of many biological systems, including ion
channels, modulatory subunits, signaling systems that modulate their activity,
and mechanisms that regulate the expression of their responsible genes. The
problem of drug exposure causing exaggerated QT interval prolongation and
torsades de pointes highlights the multicomponent nature of cardiac
repolarization and the way in which simple perturbations can yield exaggerated
responses. Future directions will involve cellular approaches coupled to evolving
technologies that can interrogate multicellular systems and provide a
sophisticated view of mechanisms in this previously idiosyncratic drug reaction.