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Vol. 69. Issue 6.
Pages 610 (June 2016)
Vol. 69. Issue 6.
Pages 610 (June 2016)
ECG Contest
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Response to ECG, May 2016
Respuesta al ECG de mayo de 2016
Víctor Bazán
Unidad de Arritmias, Servicio de Cardiología, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
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Rev Esp Cardiol. 2016;69:51810.1016/j.rec.2015.12.018
Víctor Bazán
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The patient has second-degree atrioventricular (AV) block alternating with slowly-conducted P waves (long PR) via an intermittent left accessory pathway. The existence of this pathway avoids potential prolonged asystole due to advanced atrioventricular block. After pacemaker implantation, paced rhythm alternated with conduction via the pathway, which disappeared over time (Figures 1–3).

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Copyright © 2016. Sociedad Española de Cardiología
Revista Española de Cardiología (English Edition)

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