title: Second degree atrioventricular block Mobitz type I after administration of benzathine penicillin: case report.
abstract: OBJECTIVE
  Second degree atrioventricular block Mobitz type I is seen as a transitory change in the presence of inferior wall myocardial infarction or drug intoxication. The objective of this report was to present a case of second degree atrioventricular block Mobitz type I after administration of benzathine penicillin.
  
  
  METHODS
  The patient had a syncopal episode and sudoresis after administration of benzathine penicillin. On physical exam, he presented diaphoresis, bradycardia, and irregular heart rate. The electrocardiogram (ECG) showed second degree atrioventricular block Mobitz type I. Intravenous atropine, 0.5 mg, was administered. An ECG done one hour later was normal. The patient remained asymptomatic and, and after six hours he was discharged.
  
  
  CONCLUSIONS
  The patient developed second degree atrioventricular block Mobitz type I after the administration of benzathine penicillin.
authors.affiliation: Universidade Estadual do Ceará.
authors.forename: Lúcia de Sousa
authors.initials: Lde S
authors.lastname: Belém
authors.forename: Cristiano Aparecido Cavalcante
authors.initials: CA
authors.lastname: Inácio
mesh_terms: D000328:Adult; D000900:Anti-Bacterial Agents / Q000009:adverse effects*; D054537:Atrioventricular Block / Q000139:chemically induced* / Q000145:classification*; D006801:Humans; D008297:Male; D010401:Penicillin G Benzathine / Q000009:adverse effects*
chemical_list: D000900:Anti-Bacterial Agents; D010401:Penicillin G Benzathine