**Question:** Ebstein's anomaly is seen with intake of –

A. Certain medications
B. Alcohol
C. Smoking
D. Vitamin C deficiency

**Core Concept:**
Ebstein's anomaly is a congenital heart defect characterized by abnormal positioning of the tricuspid valve leaflets relative to the tricuspid valve annulus in the right ventricle. This results in impaired right ventricular function and can lead to cyanosis, congestive heart failure, and arrhythmias.

**Why the Correct Answer is Right:**
Ebstein's anomaly is primarily caused by genetic factors, with only a small percentage being due to acquired causes. There is no direct relationship between Ebstein's anomaly and the intake of certain medications, alcohol, smoking, or vitamin C deficiency.

**Why Each Wrong Option is Incorrect:**

A. Certain medications: Although medications can cause valvular heart diseases, they are not the primary cause of Ebstein's anomaly. Misuse or abuse of certain drugs can lead to valvular heart diseases, but they are not the main cause of Ebstein's anomaly.

B. Alcohol: Alcohol intake can lead to alcoholic cardiomyopathy, which may cause valvular heart diseases but is not the primary cause of Ebstein's anomaly.

C. Smoking: Smoking may lead to various cardiovascular diseases, including atherosclerosis and peripheral vascular disease, but is not the primary cause of Ebstein's anomaly.

D. Vitamin C deficiency: Vitamin C deficiency is not a direct cause of Ebstein's anomaly, as this disorder arises from genetic factors and congenital abnormalities.

**Clinical Pearl:**

Ebstein's anomaly is a congenital heart defect and should be differentiated from acquired heart diseases caused by medications, alcohol, smoking, or vitamin C deficiency. This understanding is crucial for accurate diagnosis and treatment planning. While medications, alcohol, and smoking can cause valvular heart diseases, they are not the primary cause of Ebstein's anomaly. Similarly, vitamin C deficiency is not a direct cause of Ebstein's anomaly. The condition results from genetic factors and congenital abnormalities, emphasizing the need for correct identification and differentiation from other causes of valvular heart diseases.