Coeur en Sabot (Boot shaped heart) is typical of:
**Core Concept**
Coeur en Sabot, or "boot-shaped heart," is a radiological term describing the characteristic appearance of the cardiac silhouette on chest X-rays. This abnormal shape is due to the right ventricle being enlarged, which is a common finding in conditions that cause right ventricular hypertrophy.
**Why the Correct Answer is Right**
The boot-shaped heart is typically seen in Ebstein's anomaly, a congenital heart defect characterized by the abnormal formation of the tricuspid valve and the right ventricle. In Ebstein's anomaly, the tricuspid valve is abnormally formed and attached lower in the right ventricle, leading to right ventricular hypertrophy and dilation. This results in the characteristic boot-shaped appearance on chest X-rays. The right ventricle becomes enlarged due to the increased workload on the right side of the heart, which is responsible for pumping blood to the lungs.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Coeur en Sabot is not typically associated with conditions that cause left ventricular hypertrophy, such as hypertension or aortic stenosis.
* **Option B:** This option is incorrect because Coeur en Sabot is not typically associated with conditions that cause a dilated cardiomyopathy, such as heart failure or cardiomyopathy.
* **Option D:** This option is incorrect because Coeur en Sabot is not typically associated with conditions that cause a normal or even smaller cardiac silhouette, such as pulmonary hypertension or aortic regurgitation.
**Clinical Pearl / High-Yield Fact**
Remember that Ebstein's anomaly is a congenital heart defect that can be associated with other anomalies, such as atrial septal defects and patent foramen ovale. It is essential to consider Coeur en Sabot as a possible finding in patients with congenital heart disease.
**Correct Answer:** C.