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Figure 3 The figure shows the electrocardiographic recording of the syncopal event observed in the same patient as in Figure 2 (Patient no. 2). The onset of atrioventricular block is sudden, with a long ventricular asystole of 7 s. The sinus rate increases during the spontaneous event. The increase in sinus rate during the episode argues against the presence of a vagal reflex. The noise recorded probably reflects jerking movements of the patient during syncope.