Key result
Catheter ablation using a transseptal approach or radiofrequency energy from the left sinus of Valsalva successfully eliminated conduction in two patients with rare concealed left anterior pathways.
Case Report (n=207)
No
Concealed left anterior accessory pathways are rare but can be successfully ablated using a transseptal approach or from the left sinus of Valsalva.
Supports ablation feasibility for rare concealed left anterior pathways; hypothesis-generating and should not yet alter practice.
Concealed Left Anterior Accessory Pathway. Left anterior accessory pathways are considered to occur rarely because the junction between the aortic and mitral valve areas represents a fibrous continuity. Of 207 patients with concealed left accessory pathways in whom catheter ablation was performed at our institution over the past 8 years, two patients had concealed left anterior accessory pathways. The polarity of the retrograde P waves was positive in the inferior leads and negative in leads I and aVL during orthodromic reciprocating tachycardia. Complete elimination of accessory pathway conduction was achieved using a transseptal approach or with radiofrequency energy application from the left sinus of Valsalva. (J Cardiovasc Electrophysiol, Vol. 14, pp. 204‐208, February 2003)
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Tada et al. (2003) conducted a case report in Concealed left accessory pathways (n=207). Catheter ablation was evaluated on Elimination of accessory pathway conduction. Catheter ablation using a transseptal approach or radiofrequency energy from the left sinus of Valsalva successfully eliminated conduction in two patients with rare concealed left anterior pathways.
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