The evaluation of a ventricular septal defect begins with a medical history and physical examination.

Physical findings in someone with a ventricular septal defect may include:

• Heart murmur:
• During examination with a stethoscope
• Leg swelling (bilateral)
• Lung congestion:
• During examination with a stethoscope

Tests are required to make the diagnosis of a ventricular septal defect.

Tests that may be used to evaluate a ventricular septal defect include:

• Electrocardiogram
• Chest x-ray:
• Chest x-ray may be normal
• Enlarged heart or heart failure from ventricular septal defect
• Echocardiogram
• Used to detect a ventricular septal defect.
• Cardiac catheterization