Under what circumstances is a left ventricular assist device used?

• A. To permanently replace the function of one or both of the ventricles
• B. As a bridge to heart transplantation while a donor heart is being located
• C. To reduce ventricular pumping force in patients with aortic aneurysms
• D. To ensure that the ventricles contract at an adequate and consistent rate

Answer: (B)

Left ventricular assist devices provide mechanical pumping support to the left ventricle, boosting cardiac output when the heart can't pump effectively on its own. They are used as a bridge to heart transplantation, a temporary measure that keeps blood flowing and organs well-perfused while a donor heart is being located. This helps patients survive the wait for a transplant without deteriorating. It isn’t meant as a permanent replacement of the ventricles, it doesn’t reduce pumping force for conditions like aortic aneurysms, and it isn’t a method to control the heart’s rhythm.