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J Am Coll Cardiol, 1987; 9:455-458
© 1987 by the American College of Cardiology Foundation
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Enhancement of conduction in an accessory pathway by local noncaptured stimuli

R Rothschild, WG Stevenson, T Klitzner, and J Weiss

Subthreshold stimuli have been reported to prolong the refractory period of myocardial tissue. This report presents the first case of reproducible acceleration of a reentrant tachycardia by apparently subthreshold stimuli delivered to the os of the coronary sinus during the atrial refractory period in a child with incessant orthodromic tachycardia utilizing a posteroseptal pathway. Mechanisms by which these stimuli could influence the tachycardia circuit are proposed, and the potential usefulness of this finding for mapping tachyarrhythmias is discussed.


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H.-N. Pak, Y.-B. Liu, H. Hayashi, Y. Okuyama, P.-S. Chen, and S.-F. Lin
Synchronization of ventricular fibrillation with real-time feedback pacing: implication to low-energy defibrillation
Am J Physiol Heart Circ Physiol, December 1, 2003; 285(6): H2704 - H2711.
[Abstract] [Full Text] [PDF]


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Copyright © 1987 by the American College of Cardiology Foundation.