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The pacing site and tachycardia direction determined whether classic or concealed entrainment manifested in a patient with typical and atypical atrial flutter.
Demonstrates that the manifestation of classic versus concealed entrainment in atrial flutter depends on pacing site and tachycardia direction.
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Entrainment patterns vary by pacing site in atrial flutter; leaves open mechanistic generalizability beyond this case.
Classic and concealed entrainment was demonstrated in a patient with spontaneous typical atrial flutter and pacing-induced atypical atrial flutter. The form of entrainment manifested depended on the site of pacing and the direction of tachycardia as determined by endocardial mapping.
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Beckman et al. (1986) studied this question. The pacing site and tachycardia direction determined whether classic or concealed entrainment manifested in a patient with typical and atypical atrial flutter.
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