Symptoms vary with the precise defect and with its severity. Common ones include:
- Bluish skin from excess of blue deoxygenated blood
- Difficulty eating from mild heart failure
- Difficulty breathing, fatigue from lack of blood flow through the lungs
- Slow physical development
When the disorder is mild and no symptoms are present, the disorder is usually first discovered when a physician detects a heart murmur during a routine physical examination.
