Patients with viral cardiomyopathy may present viral symptoms, while others present heart failure as an initial symptom.
- Viral symptoms may precede any cardiac symptoms, which include:
- Flu-like symptoms (myalgias)
- Gastrointestinal disorders
- Sore throat or other respiratory infections
- Chest pain (angina)
- Shortness of breath
- Syncope (passing out)
Some patients have shortness of breath and leg swelling as their initial symptoms rather than those listed above.
The following help to identify viral cardiomyopathy:
- This is usually abnormal; however, it cannot diagnose viral myocarditis/cardiomyopathy alone.
- Lab work
- Cardiac biomarkers
- Inflammatory markers
- Respiratory swab for viral infections
- Blood work for viruses (these are rarely informative)
- Cardiac magnetic resonance imaging (MRI)
- Endomyocardial Biopsy
- Invasive procedure to take a biopsy of the heart muscle
- This is reserved for special circumstances due to risks associated with the procedure