Chouchoulis K, Chiladakis J, Koutsogiannis N, Davlouros P, Kaza M, Alexopoulos D. Impact of QT interval prolongation following antiarrhythmic drug therapy on left ventricular function.
Future Cardiol 2016;
13:13-22. [PMID:
27990843 DOI:
10.2217/fca-2016-0052]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM
We assessed whether antiarrhythmic drug-induced QT interval prolongation affects left ventricular function.
METHODS
Study population included 54 patients with symptomatic recent onset atrial fibrillation spontaneously cardioverted to sinus rhythm. Electrocardiographic and echocardiographic studies were done before initiating and after achieving drug's steady state.
RESULTS
Significantly prolonged corrected QT interval (QTc) was noticed following only sotalol and amiodarone. The corrected precontraction time increased after sotalol (p = 0.005) and amiodarone (p = 0.017), not propafenone (p = 0.139). Analysis results between ΔEF and ΔQTc, ΔEF and ΔQTc(p), ΔE/e' and ΔQTc, ΔE/e' and ΔQTc(p) for amiodarone group were (p = 0.66, p = 0.20, p = 0.66, p = 0.33), for sotalol (p = 0.36, p = 0.51, p = 0.44, p = 0.33) and for propafenone (p = 0.38, p = 0.12, p = 0.89, p = 0.61), respectively.
CONCLUSION
QT interval prolongation following antiarrhythmic therapy does not affect significantly left ventricular function.
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