Fig 68.b

Pacemaker rhythm, looking like LBBB with LAD. The slow S descent in V1 distinguishes this QRS morphology from LBBB – as, of course, do the pacing spikes. Probably VVI, with large, unipolar spikes.

Pacemaker rhythm, looking like LBBB with LAD. The slow S descent in V1 distinguishes this QRS morphology from LBBB – as, of course, do the pacing spikes. Probably VVI, with large, unipolar spikes.