Which of the following disorders of circulatory system is not correctly stated?

Options

A. Hypertension - a sustained high blood pressure of 140/90 or above
B. CAD-The lumen of coronary arteries become narrower due to deposits of calcium, fat, cholesterol and fibrous tissue.
C. Angina - Acute chest pain appears when heart muscle is suddenly damaged by inadequate blood supply, because of blockage
D. Heart failure - Usually called congestive heart failure because congestion of lungs is one of the main symptoms of the disease.

Answer

To determine which of the following disorders of the circulatory system is not correctly stated, let's analyze each statement one by one:

1. **Hypertension**: The statement claims that hypertension is sustained high blood pressure of 140 by 90 mm Hg or above. This is correct because the normal blood pressure is approximately 120/80 mm Hg, and a reading of 140/90 mm Hg indicates hypertension.

2. **Coronary Artery Disease**: The statement describes that in coronary artery disease, the lumen of the coronary artery becomes narrower due to the deposition of calcium, fat, cholesterol, and fibrous tissue. This is also correct. These deposits can lead to blockages that reduce blood flow to the heart muscle.

3. **Heart Attack**: The statement mentions that acute chest pain appears when the heart muscle is suddenly damaged by an inadequate supply of blood due to blockage. This statement is misleading. While acute chest pain is indeed a symptom of a heart attack, the heart muscle is damaged due to the blockage of blood flow, which is a more accurate description. Thus, this statement is not correctly stated.

4. **Heart Failure**: The statement indicates that heart failure is usually called congestive heart failure because congestion of the lungs is one of the main symptoms of the disease. This is correct. Congestive heart failure often leads to fluid buildup in the lungs, causing difficulty in breathing.

Based on this analysis, the disorder that is not correctly stated is **option 3**, which refers to the heart attack.

### Step-by-Step Solution:
1. **Analyze the first statement about hypertension**: Confirm that it accurately describes hypertension as high blood pressure of 140/90 mm Hg or above.
2. **Evaluate the second statement regarding coronary artery disease**: Check if it correctly explains the narrowing of the coronary artery due to deposits.
3. **Examine the third statement about heart attack**: Identify if the description of acute chest pain and heart muscle damage is accurate.
4. **Review the fourth statement on heart failure**: Validate that it correctly associates heart failure with lung congestion.
5. **Conclude which statement is incorrect**: Identify that the third statement about heart attack is misleading.