Title : Epinephrine-induced QT interval prolongation: a gene-specific paradoxical response in congenital long QT syndrome.

Pub. Date : 2002 May

PMID : 12004990






4 Functional Relationships(s)
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1 During epinephrine infusion, every LQT1 patient manifested prolongation of the QT interval (paradoxical response), whereas healthy controls and patients with either LQT2 or LQT3 tended to have shortened QT intervals (P<.001). Epinephrine potassium voltage-gated channel subfamily Q member 1 Homo sapiens
2 Low-dose epinephrine (0.05 microg x kg(-1) x min(-1)) completely discriminated LQT1 patients (AQT, +82+/-34 ms) from controls (AQT, -7+/-13 ms; P<.001). Epinephrine potassium voltage-gated channel subfamily Q member 1 Homo sapiens
3 CONCLUSIONS: Epinephrine-induced prolongation of the QT interval appears pathognomonic for LQT1. Epinephrine potassium voltage-gated channel subfamily Q member 1 Homo sapiens
4 Low-dose epinephrine infusion distinguishes controls from patients with concealed LQT1 manifesting an equivocal QTc at rest. Epinephrine potassium voltage-gated channel subfamily Q member 1 Homo sapiens