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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Heart Rhythm. 2013 Jul 5;10(10):10.1016/j.hrthm.2013.07.003. doi: 10.1016/j.hrthm.2013.07.003

Figure 1.

Figure 1

Apamin effect on QT interval and arrhythmias in failing hearts. A. Representative pECG traces of QT interval in a failing heart with complete atrioventricular (AV) block before and after 100 nmol/l apamin. B. Paired dot plot shows QTc at baseline and in the presence of apamin 100 nmol/L. There was significant prolongation of QTc. C. Representative traces at baseline and in the presence of apamin. Top panel, complete AV block developed during AV node cryoablation. Second panel, no polymorphic ventricular tachycardia (VT) was recorded at baseline. However, several episodes of spontaneous torsade de pointes (TdP) polymorphic ventricular arrhythmia developed in the presence of apamin (bottom panels).