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  Indian J Med Microbiol
 

Figure 1: Patients' electrocardiogram on admission shows sinus rhythm, right bundle branch block, left posterior fascicular block, and regular pace spikes unrelated with QRS complexes. Note that hidden pace spikes in the third and eleventh QRS complexes

Figure 1: Patients' electrocardiogram on admission shows sinus rhythm, right bundle branch block, left posterior fascicular block, and regular pace spikes unrelated with QRS complexes. Note that hidden pace spikes in the third and eleventh QRS complexes