Myocarditis Associated with H1N1 Influenza

Abstract

Influenza is an acute respiratory illness caused by influenza viruses that occur in outbreaks and epidemics worldwide. Signs and symptoms of upper and/or lower respiratory tract involvement are present, along with indications of systemic illness such as fever, headache, myalgia, and weakness. Influenza is usually a self-limited disease; however, in certain individuals, there can be complications like myocarditis, ARDS, etc. Influenza A virus, subtype H1N1 is known to cause severe illness. We report an unusual case of H1N1 Influenza, in an elderly female presenting with fever and syncope. She was diagnosed case of hypertension and diabetes on treatment. On evaluation, it was found that she had bradycardia, due to myocarditis, which attributed to her symptom of syncope. This kind of presentation of H1N1 Influenza infection is rare, complete examination and high degrees of suspicion are necessary. The rapid progression in lack of active management and treatment can be fatal.