Key result
Programmed atrial stimulation induces clinically irrelevant fixed coupled ventricular premature beats via intraventricular macroreentry.
Intraventricular macroreentry induced by atrial stimulation can occur as a reproducible laboratory curiosity without clinical significance in patients with ventricular tachycardia.
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Induced macroreentry by atrial pacing warrants no clinical action in VT; leaves open its prevalence across substrates.
During electrophysiologic study in a patient, programmed stimulation of the atrium induced fixed coupled ventricular premature beats on the basis of intraventricular macroreentry. This type of macroreentry, which was reproducible, appears to have been merely a "laboratory curiosity" and never played a clinical role in this patient with chronic recurrent ventricular tachycardia.
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Iesaka et al. (1983) studied this question. Programmed atrial stimulation induced fixed coupled ventricular premature beats via intraventricular macroreentry, acting merely as a laboratory curiosity without clinical relevance.
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