Can influenza A or influenza B cause an increased heart rate?

For healthy individuals, infection with influenza A or influenza B virus may cause various adverse reactions, one of which is increased heart rate. When infected with influenza A or B virus, the body's immune system produces large amounts of immunoglobulins to suppress viral replication, but this also causes physical stress, leading to an elevated heart rate. Tachycardia may occur, especially during physical activity, emotional stress, or worsening of the illness, when the increase in heart rate becomes more pronounced. Additionally, this symptom may be more severe in patients with allergies, heart disease, or other underlying medical conditions. It is recommended that patients seek timely medical attention and receive appropriate treatment.