Final answer:
Valvular annuloplasty, a cardiac valve repair technique, typically uses a ring device to reshape and stabilize the valve's circumference, differing from angioplasty, which uses balloons and stents for vessel dilation.
Step-by-step explanation:
Valvular annuloplasty is a surgical technique used to repair a heart valve with an abnormal or damaged structure. In most cases, the procedure is accomplished using a ring device that is designed to reshape and provide support to the valve's annulus, effectively restoring its function and ensuring proper closure of the valve leaflets. While angioplasty is a related cardiovascular procedure that often utilizes a balloon or stent to dilate narrowed blood vessels, annuloplasty specifically targets valve repair and is best served by a ring device. Therefore, the best answer to the question, 'Valvular annuloplasty is best accomplished by the following device' would be B. Ring.