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Ventricular Septal Defect

Ventricular Septal Defect - What it is

The septum is a wall that separates the heart’s left and right chambers. A defect between the lower two chambers (the ventricles) is called a ventricular septal defect (VSD). When there is a large defect between the ventricles, blood from the heart’s left lower chamber is forced through the defect into the right lower chamber because of higher pressure in the left lower chamber. Therefore, more blood is pumped back into the lungs and to the left upper and lower chambers.

If the VSD is significant in size, the heart will become enlarged from the additional blood volume and increased workload. High blood pressure may also build up in the lungs (pulmonary hypertension) from the increased blood flow. Pump failure and abnormal heart rhythms can result as well.

Complications associated with smaller defects include endocarditis, leakage of blood through the aortic valve (aortic regurgitation) and growth of muscle band resulting in double chamber right ventricle. 

Ventricular Septal Defect - How to prevent?

Ventricular Septal Defect - Causes and Risk Factors

Ventricular Septal Defect - Preparing for surgery

Ventricular Septal Defect - Other Information

The information provided is not intended as medical advice. Terms of use. Information provided by SingHealth

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