When cardiac muscles degenerate into fibrous tissues due to inflammation of the myocardium, the disease is called

Options

A. pericarditis
B. endocarditis
C. peritonitis
D. cardiomyopathy

Answer

To solve the question, we need to identify the disease that occurs when cardiac muscles degenerate into fibrous tissues due to inflammation of the myocardium. Let's break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Question**: The question states that there is degeneration of cardiac muscle into fibrous tissues due to inflammation of the myocardium. We need to find the correct term for this condition.

2. **Identifying Key Terms**:
- **Cardiac Muscle**: This refers to the muscle tissue of the heart, which is responsible for pumping blood.
- **Fibrous Tissue**: This is a type of connective tissue that can replace normal muscle tissue when it degenerates.
- **Myocardium**: This is the muscular middle layer of the heart wall, primarily responsible for the heart's contraction.

3. **Analyzing the Options**:
- **Option A: Pericarditis**: This refers to inflammation of the pericardium, the outer layer surrounding the heart. It does not involve degeneration of cardiac muscle.
- **Option B: Endocarditis**: This is inflammation of the inner lining of the heart chambers and valves. It is not related to the degeneration of myocardium.
- **Option C: Peritonitis**: This is inflammation of the peritoneum, the lining of the abdominal cavity. It is not related to the heart.
- **Option D: Cardiomyopathy**: This refers to diseases of the heart muscle (myocardium) that can lead to the weakening and degeneration of the cardiac muscle, often resulting in the replacement of muscle tissue with fibrous tissue.

4. **Conclusion**: Based on the definitions and the context provided, the correct answer is **Option D: Cardiomyopathy**. This condition involves the degeneration of cardiac muscle into fibrous tissue due to inflammation of the myocardium.

### Final Answer:
The disease is called **Cardiomyopathy**.