Which of the following is classified as an acyanotic congenital heart abnormality?

Acyanotic congenital heart abnormalities are those that typically allow for adequate oxygenated blood flow to the body despite structural defects. This means that, although there is a defect in the heart or great vessels, the blood remains predominantly oxygen-rich, leading to a lack of cyanosis, or blueness, associated with low oxygen levels.

A ventricular septal defect (VSD) is characterized by an abnormal opening between the left and right ventricles of the heart. This defect allows oxygenated blood from the left ventricle to flow into the right ventricle, and subsequently into the lungs rather than out to the rest of the body. Because of the mixing of blood, there may be increased blood flow to the lungs without compromising systemic oxygenation, thus usually maintaining normal oxygen levels in the body. Therefore, VSD is classified as an acyanotic congenital heart defect.

In contrast, transposition of the great vessels leads to two separate circulations—one that is oxygenated and one that is deoxygenated—resulting in significant cyanosis. Pulmonary stenosis causes obstruction to blood flow to the lungs but can present acyanotically until severe. However, it is also categorized more specifically as an obstructive lesion. Tetralogy