Josephson and Wellens ECG Lessons: A Monthly Visit to the 12 Lead ECG| Volume 15, ISSUE 8, P1275-1276, August 01, 2018

A narrow QRS tachycardia showing ventriculoatrial conduction lengthening during catheter ablation

      The patient was a 34-year-old man with a 4-year history of episodes of rapid heart rates that varied in duration from a few minutes to several hours. The ECG recorded during sinus rhythm showed AV conduction over a right posteroseptal accessory pathway (AP).
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        • Sternick E.B.
        • Correa F.S.
        • Rego S.
        • Santos D.M.
        • Damascena F.
        • Scarpelli R.
        • Gerken L.M.
        • Wellens H.J.
        Postablation-acquired short atrioventricular Mahaim-type fibers: observations on their clinical, electrocardiographic and electrophysiologic profile.
        Heart Rhythm. 2012; 9: 850-858