The correct answer is 1. A right ventricular assist device (RVAD) is a mechanical circulatory support device designed to assist or replace the function of the heart's right ventricle. RVADs are typically used in conjunction with left ventricular assist devices (LVADs) or total artificial hearts (TAHs) to provide comprehensive support. The most common placement sites for RVADs include:
1. Right Atrium to Pulmonary Artery (RA-PA)
2. Right Ventricle to Pulmonary Artery (RV-PA)
3. Right Atrium to Right Ventricle to Pulmonary Artery (RA-RV-PA)
The choice of placement site depends on various factors, including the patient's anatomy, hemodynamic status, and the specific characteristics of the RVAD device being used.