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Figure 3 Continuous recordings from case 8 showing entrainment of the tachycardia by overdrive ventricular pacing. The tachycardia displayed a cycle length of 435 to 445 ms. The ventricular pacing was conducted from the right ventricular apex at a cycle length of 400 ms. The last three paced beats entrained the tachycardia. Note the atrial activation sequences of the entrained beats are similar to that during tachycardia.
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