Fever of unknown origin electrocardiogram

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There are no specific ECG findings associated with fever of unknown origin. However tachycardia is mostly present whose pattern may be helpful in some cases.


  1. Presence of fever and tachycardia on ECG signifies that patient is having fever.
  2. Relative Tachycardia in proportion to the degree fever signifies infection.
  3. Relative bradycardia in proportion to the degree fever may be sign of legionnaires’ disease or drug fever.[1]


  1. Cunha BA (1996). "The clinical significance of fever patterns". Infect Dis Clin North Am. 10 (1): 33–44. doi:10.1016/s0891-5520(05)70284-1. PMID 8698993.

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