Viral myocarditis can have respiratory or gastrointestinal precursor manifestations before the onset of the disease. After the onset of the disease, mild cases can be asymptomatic, while severe cases can have systemic toxicity manifestations, symptoms of cardiac involvement and so on.
1. Prodromal manifestations: patients with viral myocarditis usually start with viral infection, and symptoms of respiratory or gastrointestinal infections, such as cough, abdominal pain, diarrhea and other symptoms may appear 1~3 weeks before the onset of the disease.
2. Systemic toxicity: patients with viral myocarditis may have mild or moderate fever, headache, muscle pain, generalized weakness and other systemic manifestations.
3. Symptoms of heart involvement: viral infection can lead to damage of cardiomyocytes, affecting the normal physiological function of the heart, patients may experience palpitations, chest pain, dyspnea and other symptoms, and in severe cases, cardiogenic shock, or even sudden death and other adverse consequences.
In short, those who have the above symptoms should consult the doctor in time and receive relevant treatment as soon as possible.