J Korean Med Sci.  2020 May;35(20):e134. 10.3346/jkms.2020.35.e134.

Syncope after Influenza Virus Infection

Affiliations
  • 1Department of Neurology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
  • 2Department of Neurology, Jeonbuk National University Hospital, Jeonju, Korea
  • 3Department of Neurology, Asan Medical Center, University of Ulsan, College of Medicine Seoul, Korea

Abstract

Influenza is an epidemical acute respiratory disease caused by viral infection. Several complications in the respiratory tract, such as pneumonia can occur. However, rare but serious neurological complications are also observed. Here, we described the prevalence, characteristics and suggestive pathomechanism of syncope after influenza infection season. Of 2.2% of patients diagnosed as influenza experienced syncope. None of the patients had severe cough, low blood pressure (BP) or dehydration. Patients suffered with frequent dizziness before syncope. Patient with long duration of loss of consciousness was more observed in those with high fever or positive orthostatic BP drop.

Keyword

Influenza; Syncope; Orthostatic Blood Pressure Drop
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