Most common Cardiac anomoly associated with Turner’s syndrome
**Core Concept**
Turner's syndrome is a genetic disorder in females characterized by the complete or partial absence of one X chromosome, leading to various systemic manifestations, including cardiovascular anomalies. The cardiac manifestations are thought to be due to the abnormal development of the embryonic heart.
**Why the Correct Answer is Right**
The most common cardiac anomaly associated with Turner's syndrome is bicuspid aortic valve (BAV). BAV is a congenital heart defect where the aortic valve, which normally has three cusps, has only two. This defect can lead to aortic stenosis or regurgitation and is a significant risk factor for aortic aneurysms and dissections. The pathophysiology of BAV in Turner's syndrome is thought to be related to the abnormal expression of genes involved in heart development, particularly those on the X chromosome.
**Why Each Wrong Option is Incorrect**
**Option A:** Coarctation of the aorta is another cardiac anomaly associated with Turner's syndrome, but it is less common than BAV. Coarctation refers to a narrowing of the aortic isthmus, which can lead to hypertension and heart failure.
**Option B:** Ventricular septal defects are common in children with congenital heart disease, but they are not the most common cardiac anomaly associated with Turner's syndrome.
**Option C:** Atrial septal defects are another type of congenital heart defect, but they are not specifically associated with Turner's syndrome.
**Option D:** Hypoplastic left heart syndrome is a severe congenital heart defect, but it is not the most common cardiac anomaly associated with Turner's syndrome.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that patients with Turner's syndrome are at increased risk of cardiovascular disease, including hypertension, atherosclerosis, and cardiac arrhythmias. Regular cardiac evaluation and management are crucial in these patients.
**Correct Answer:** A. Bicuspid aortic valve.