ISSN: 1885-5857 Impact factor 2023 7.2
Vol. 67. Num. 10.
Pages 853 (October 2014)

Ecg contest
Response to ECG, September 2014

Respuesta al ECG de septiembre de 2014

Adolfo Fontenla
Rev Esp Cardiol. 2014;67:76810.1016/j.rec.2014.05.006
Adolfo Fontenla

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Flecainide administration produced a lengthening of the PR interval and disappearance of the abnormal Q waves observed in V1-V3. This occurred because the drug interrupted conduction through a right free wall accessory pathway that was causing the pre-excitation seen on the baseline electrocardiogram, leaving a right bundle branch block pattern. Nonetheless, the finding of this accessory pathway likely does not explain the mechanism causing the syncopes, which appear to be situational.

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