Brembilla-Perrot B, Houriez P, Beurrier D, Behr B. Accessory pathway with two conduction times.
J Interv Card Electrophysiol 2004;
11:29-32. [PMID:
15273451 DOI:
10.1023/b:jice.0000035926.06422.27]
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Abstract
A 48-year old man was referred for frequent paroxysmal narrow QRS tachycardias. Either a rapid orthodromic tachycardia (220 b/min) using a fast-conducting left lateral concealed atrioventricular (AV) accessory pathway (AP) for its retrograde conduction or a slow orthodromic tachycardia (125 b/min) using the same concealed AP which was slow-conducting, were induced. One application of radiofrequency energy at the earliest site of retrograde conduction suppressed both forms of tachycardias. Reciprocating tachycardias presenting with different retrograde conduction times were related to a single reentrant circuit.
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