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. 2011 Oct 18;16(4):409–411. doi: 10.1111/j.1542-474X.2011.00456.x

Figure 2.

Figure 2

At 6:15 a.m., a few ventricular premature beats with very short coupling intervals occurred, without prolongation of the QTc interval. Two of them initiated a polymorphic VT. The first episode (a, top) terminated spontaneously while the second one (b, bottom) deteriorated to VF.