Step 1: Defining Ventricular Assist Device (VAD).
A Ventricular Assist Device (VAD) is a mechanical pump designed to augment the function of a failing heart.
Its primary role is to aid the left ventricle in circulating blood throughout the body. This reduces the heart's strain and offers support pending a heart transplant or cardiac recovery.
Step 2: Evaluating potential solutions.
- (A) Intra-aortic balloon pump (IABP): Primarily enhances coronary blood flow, it does not directly assist systemic blood circulation.
- (B) Skeletal muscle assist device: These are experimental devices intended for muscular support, not cardiac function.
- (C) Defibrillator: This device is used to correct irregular heart rhythms, not to facilitate blood pumping.
- (D) Ventricular assist device (VAD): Correct. This device directly supports the pumping action of a compromised heart.
Step 3: Final determination.
Consequently, the appropriate selection is (D) Ventricular assist device (VAD).