January 12, 1980Acta Medica Scandinavica
Influenza Al Myocarditis in Conscripts
Key result
Influenza A infection resulted in a 9% incidence of acute myocarditis among conscripts hospitalized with verified or suspected influenza.
Why the study?
What is the incidence of acute myocarditis in conscripts hospitalized with sudden respiratory infection during an influenza A1 epidemic?
Population
104 conscripts taken consecutively to hospital because of a sudden respiratory infection during an A1 virus…
Design
Cohort
Authors
Discussion
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Implication
Influenza A may confer myocarditis risk in young adults; leaves open need for targeted cardiac surveillance in future outbreaks.
Key Points
- To study the incidence of viral myocarditis during an influenza A epidemic in military conscripts.
- Prospective study conducted at Central Military Hospital 1 in Finland during January 1978.
- Included 104 conscripts with respiratory infections; 41 confirmed influenza A via serological analysis.
- Monitored electrocardiographic changes and performed multidirectional echocardiography for myocardial assessment.
- Incidence of influenza A myocarditis was 9% among 67 confirmed or suspected cases.
- Six serologically confirmed influenza patients showed acute myocarditis based on ECG changes.
- Three of the myocarditis patients had elevated MB-CK isoenzyme levels.
Study Design
Type
Cohort (n=104)
Multicenter
No
Structured PICO
What is the incidence of acute myocarditis in conscripts hospitalized with sudden respiratory infection during an influenza A1 epidemic?
P
Population
104 conscripts hospitalized for sudden respiratory infection during an influenza A epidemic.
O
Outcome
Incidence of acute viral myocarditis (diagnosed on the basis of serial electrocardiographic ST segment and/or T wave changes unresponsive to beta-blockade)surrogate
ECG changes during influenza A infection commonly indicate mild myocardial involvement, with an incidence of acute myocarditis of approximately 9% in hospitalized conscripts.
Cite This Study
Karjalainen et al. (1980) conducted a cohort in Sudden respiratory infection / Influenza A (n=104). Influenza A infection was evaluated on Acute myocarditis. Influenza A infection resulted in a 9% incidence of acute myocarditis among conscripts hospitalized with verified or suspected influenza.