Most common congenital hea disease during pregnancy –
**Core Concept**
Congenital heart disease (CHD) in pregnancy poses significant risks to both the mother and the fetus. The most common CHD in pregnancy is often related to the structural abnormalities present at birth. Understanding the prevalence and management of CHD during pregnancy is crucial for obstetricians and cardiologists.
**Why the Correct Answer is Right**
The most common congenital heart disease during pregnancy is **bicuspid aortic valve (BAV)**. BAV is a congenital condition where the aortic valve has only two cusps instead of the normal three. This defect can lead to aortic stenosis or regurgitation, which may cause symptoms during pregnancy. The increased blood volume and cardiac output during pregnancy can exacerbate the symptoms of BAV, making it a significant concern for obstetricians.
**Why Each Wrong Option is Incorrect**
* **Option A:** Tetralogy of Fallot is a cyanotic congenital heart disease, but it is less common than BAV in pregnancy.
* **Option B:** Coarctation of the aorta is a congenital narrowing of the aortic isthmus, but it is not the most common CHD in pregnancy.
* **Option C:** Tricuspid atresia is a rare congenital heart defect where the tricuspid valve is absent or abnormally developed, making it an unlikely choice as the most common CHD in pregnancy.
**Clinical Pearl / High-Yield Fact**
It is essential to note that women with BAV are at increased risk of aortic dissection during pregnancy due to the increased blood volume and cardiac output. A thorough pre-conception evaluation and close monitoring during pregnancy are crucial for preventing complications.
**Correct Answer: BAV**