FE Congenital Heart Disease Recognition 1 — Questions and Answers
Question 1: Which congenital heart defect is characterized by a single outflow tract from the ventricles?
- Tetralogy of Fallot
- Truncus arteriosus (Correct answer)
- Coarctation of the aorta
- Transposition of the great arteries
Correct answer: Truncus arteriosus
Truncus arteriosus is a rare congenital heart defect characterized by a single great artery arising from both ventricles, instead of the normal separate aorta and pulmonary artery. This single vessel overrides a large ventricular septal defect, serving as the common outflow tract for systemic, pulmonary, and coronary circulation. This condition is distinct from other defects by its singular outflow tract.
Question 2: Which condition presents with a large ventricular septal defect and overriding aorta?
- Tetralogy of Fallot (Correct answer)
- Tricuspid atresia
- Ebstein's anomaly
- Double outlet right ventricle
Correct answer: Tetralogy of Fallot
Tetralogy of Fallot is a complex congenital heart defect characterized by four main features: a large ventricular septal defect (VSD), pulmonary stenosis, an overriding aorta, and right ventricular hypertrophy. The overriding aorta, positioned directly above the VSD, receives blood from both ventricles. This combination of defects leads to reduced blood flow to the lungs and mixing of oxygenated and deoxygenated blood.
Question 3: Which congenital heart disease features complete reversal of the great arteries?
- Hypoplastic left heart syndrome
- Transposition of the great arteries (Correct answer)
- Aortic stenosis
- Pulmonary atresia
Correct answer: Transposition of the great arteries
Transposition of the great arteries (TGA) is a congenital heart defect where the two main arteries leaving the heart are completely reversed. The aorta originates from the right ventricle and the pulmonary artery from the left ventricle. This creates two separate, parallel circulatory systems, meaning deoxygenated blood circulates to the body and oxygenated blood circulates to the lungs, a condition incompatible with life without mixing.
Question 4: Which heart defect is associated with an absent or small left ventricle?
- Truncus arteriosus
- Tetralogy of Fallot
- Coarctation of the aorta
- Hypoplastic left heart syndrome (Correct answer)
Correct answer: Hypoplastic left heart syndrome
Hypoplastic left heart syndrome (HLHS) is a severe congenital heart defect where the left side of the heart is critically underdeveloped. This includes a very small or absent left ventricle, often accompanied by hypoplasia of the aorta and abnormalities of the mitral and aortic valves. As a result, the left side of the heart is unable to effectively pump blood to the body, requiring complex surgical intervention.
Question 5: Which echocardiographic view best identifies ventricular septal defects (VSD)?
- 3-vessel view
- Aortic arch view
- Four-chamber view (Correct answer)
- Long-axis view
Correct answer: Four-chamber view
The four-chamber view in echocardiography provides a comprehensive image of both atria and ventricles, along with the atrioventricular valves. This view is crucial for identifying ventricular septal defects (VSDs) because it allows direct visualization of the interventricular septum. Any communication or hole between the ventricles can be clearly seen, making it the best view for VSD detection.
Question 6: Which condition is characterized by downward displacement of the tricuspid valve leaflets?
- Double inlet left ventricle
- Ebstein’s anomaly (Correct answer)
- Truncus arteriosus
- Atrioventricular canal defect
Correct answer: Ebstein’s anomaly
Ebstein’s anomaly is a rare congenital heart defect characterized by the downward displacement of the tricuspid valve leaflets into the right ventricle. This displacement leads to a portion of the right ventricle becoming 'atrialized' and can cause significant tricuspid regurgitation. The abnormal valve position impairs right ventricular function and can lead to right heart failure.
FE Congenital Heart Disease Recognition 1
Which congenital heart defect is characterized by a single outflow tract from the ventricles?