At first, the tachycardia was regular with a narrow QRS and a retrograde P-wave at the end of the QRS complex. Then, after spontaneous interruption, there was a preexcited first sinus beat, a pattern characteristic of left-sided accessory pathway. This was followed by normal sinus rhythm, without preexcitation. The diagnosis was orthodromic tachycardia mediated by a left-sided accessory pathway with bidirectional conduction and intermittent preexcitation. Ablation of the accessory pathway was performed.
Journal Information
Vol. 69. Issue 4.
Pages 441 (April 2016)
Vol. 69. Issue 4.
Pages 441 (April 2016)
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Response to ECG, March 2016
Respuesta al ECG de marzo de 2016
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Gustavo Tortajada
Servicio de Electrofisiología, Centro Cardiovascular de Casa de Galicia y Revista Uruguaya de Cardiología, Montevideo, Uruguay
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