Common thrombosis leading to myocardial infarction is of

Options

A. Right circumflex coronary artery
B. Left circumflex coronary artery
C. Left anterior descending artery
D. Right coronary artery

Answer

### Step-by-Step Solution:

1. **Understanding Myocardial Infarction**:
- Myocardial infarction, commonly known as a heart attack, occurs when blood flow to a part of the heart is blocked for a long enough time that part of the heart muscle is damaged or dies.

2. **Role of Thrombosis**:
- Thrombosis refers to the formation of a blood clot within a blood vessel. This clot can obstruct blood flow, leading to ischemia (lack of blood supply) in the heart muscle.

3. **Mechanism of Thrombosis Leading to Myocardial Infarction**:
- The common cause of thrombosis in the context of myocardial infarction is often related to atherosclerosis. Atherosclerosis is the buildup of fats, cholesterol, and other substances in and on the artery walls, which can lead to the formation of plaques.

4. **Specific Artery Involved**:
- The left anterior descending artery (LAD) is frequently implicated in myocardial infarctions. When a thrombus forms in this artery, it can severely restrict or completely block blood flow to the heart muscle supplied by this artery.

5. **Conclusion**:
- Therefore, the common thrombosis leading to myocardial infarction is associated with the left anterior descending artery.

### Final Answer:
The common thrombosis leading to myocardial infarction is of the left anterior descending artery.

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