A delta wave in a healthy Swiss conscript : one does not always have to burn to learn

We present a case of a conscript who was referred for ablation of asymptomatic Wolff-Parkinson-White syndrome. However, the electrophysiologic study revealed the presence of an accessory pathway arising infranodally in the His-Purkinje system, and inserting into the nearby ventricle. The case emphasizes the limitations of the surface ECG and the importance of a thorough electrophysiologic study. Our patient required no specific therapy but correction of the diagnosis before being declared fit for military service. A second interesting finding not described before with this type of pathway was the occurrence of transient mechanical interruption of accessory pathway conduction.