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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Heart Rhythm. 2014 Apr 21;11(8):1471–1479. doi: 10.1016/j.hrthm.2014.04.030

Figure 2.

Figure 2

Representative ECG traces from a 16 week old CASQ2 Δ/Δ mouse showing normal sinus rhythm at baseline but polymorphic VT could be evoked by exercise. Ventricular arrhythmia appeared after injection of phenylephrine: trace (1) shows an example of bidirectional VT and (2) shows a polymorphic VT with a prominent atrio-ventricular dissociation. There was no arrhythmia when phenylephrine was administered after pretreatment with verapamil. n=3.