Complete heart block in chronic chloroquine poisoning

Int J Cardiol. 1983 Sep;4(2):198-200. doi: 10.1016/0167-5273(83)90136-5.


Complete heart block of recent onset is reported and is attributed to chronic chloroquine abuse. Total blood chloroquine was more than two times higher in this patient than in 4 patients following therapeutic doses of chloroquine, and chloroquine basic metabolites were also proportionally higher in this patient's blood.

Publication types

  • Case Reports

MeSH terms

  • Chloroquine / administration & dosage
  • Chloroquine / poisoning*
  • Electrocardiography
  • Heart Block / chemically induced*
  • Humans
  • Male
  • Middle Aged
  • Self Medication


  • Chloroquine