The authors report the case of a 52-year-old woman with depressive syndrome, treated with lamotrigine for about five months, who went to the emergency department for atypical precordial pain. The electrocardiogram (ECG) revealed a 2-mm downsloping ST-segment elevation and negative T waves in V1 and V2. Due to suspicion of ST-elevation acute coronary syndrome, cardiac catheterization was performed, which revealed normal coronary arteries. The initial ECG was suggestive of type 1 Brugada pattern, but subsequent serial ECGs were less typical. A flecainide test showed the same pattern. After discontinuation of lamotrigine reversal of the typical Brugada ECG pattern was observed. Although not currently contraindicated in Brugada syndrome, the antidepressant lamotrigine blocks sodium channels, which are usually inactivated in heart cell membranes in Brugada syndrome, and may be responsible for the expression of type 1 Brugada pattern.
Keywords: Brugada pattern; Brugada syndrome; Electrocardiogram; Eletrocardiograma; Fenocópia; Flecainide test; Lamotrigina; Lamotrigine; Padrão de Brugada; Phenocopy; Síndrome de Brugada; Teste de flecainida.
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