Final answer:
A common cause for right ventricular volume overload is tricuspid regurgitation, where the tricuspid valve fails to close properly, allowing the backflow of blood and leading to volume overload.
Step-by-step explanation:
Common Causes of Right Ventricular Volume Overload
A common cause for right ventricular volume overload is tricuspid regurgitation. Tricuspid regurgitation occurs when the tricuspid valve, which is a one-way opening between the atrium and the ventricle on the right side of the heart, fails to close properly. This allows blood to flow backward into the right atrium when the right ventricle contracts. In contrast, a patent ductus arteriosus is the failure of the ductus arteriosus to close after birth, which can cause left-to-right shunting of blood and may also lead to right ventricular volume overload if the left heart structures become volume overloaded and increase the pulmonary blood flow. However, tetralogy of Fallot, which includes a ventricular septal defect (VSD), primarily causes right-to-left shunting (initial cyanosis) rather than volume overload, and pulmonic stenosis results in right ventricular pressure overload due to the obstruction of flow. It is the tricuspid regurgitation that directly leads to the volume overload in the right ventricle by allowing the backflow of blood.