[3] The reason why the tachycardia will continue when pacing is stopped is because there will be no paced wavefront, so no antidromic wavefront with which to collide; thus, the tachycardia ...

If pacing is performed during tachycardia from the protected area (see Video 4, Fig. 20A), collision will only take place inside the protected area and the paced wavefront is "forced" to exit and ...