**Core Concept**
Bastiaing surgery, also known as Batista surgery, is a surgical procedure designed to alleviate refractory left ventricular (LV) hypertrophy by reducing the size of the left ventricle. This procedure is typically considered for patients with severe heart failure who have not responded to conventional medical therapy.

**Why the Correct Answer is Right**
Ventriculectomy involves the partial removal of the left ventricular wall to reduce its size and wall tension, thereby decreasing the workload on the heart. This can lead to an improvement in cardiac function and a reduction in symptoms of heart failure. The procedure is based on the principle of reducing the left ventricular volume and wall stress, which can help to improve the heart's pumping efficiency.

**Why Each Wrong Option is Incorrect**
**Option A:** Patch repair typically involves repairing or replacing damaged heart tissue with a patch, usually to address issues such as ventricular septal defects or mitral valve problems. This is not directly related to reducing left ventricular hypertrophy.
**Option B:** MR (Mitral Regurgitation) repair is a surgical procedure aimed at correcting mitral valve regurgitation, which is not directly related to the treatment of left ventricular hypertrophy.
**Option D:** Ventriculoplasty involves the enlargement of the left ventricle, which is the opposite of what is required in the treatment of refractory left ventricular hypertrophy.

**Clinical Pearl / High-Yield Fact**
Bastiaing surgery is a high-risk procedure that should only be considered for patients with severe and refractory heart failure who have not responded to conventional medical therapy. Patients undergoing this procedure should be thoroughly evaluated and counselled regarding the risks and potential benefits.

✓ Correct Answer: C. Ventriculectomy