What are the signs of myocardial infarction that may lead to myocarditis?

• A. Upper respiratory symptoms followed by heart failure symptoms.
• B. Chest pain radiating to the arm only.
• C. Abdominal pain and vomiting.
• D. Headache with dizziness.

Answer: (A)

The key idea is that myocarditis often follows a viral infection, especially an upper respiratory illness, and then progresses to signs of cardiac involvement. After a viral illness, the heart muscle becomes inflamed, which can lead to heart failure symptoms such as shortness of breath, fatigue, edema, or chest discomfort. This pattern—recent URI followed by heart failure–type symptoms—is characteristic of myocarditis and helps distinguish it from other causes of chest pain.

Chest pain radiating to the arm is more typical of ischemic heart disease or myocardial infarction, where the pain is related to reduced blood flow rather than inflammatory damage to the heart muscle. Abdominal pain with vomiting and headache with dizziness are nonspecific symptoms that don’t point toward myocarditis as clearly.