CPT® Code 0345T

The procedure described by CPT® Code 0345T involves a transcatheter mitral valve repair using a percutaneous approach via the coronary sinus. This innovative technique is designed to address issues with the mitral valve, which is a critical structure located between the left atrium and the left ventricle of the heart. The primary function of the mitral valve is to ensure unidirectional blood flow from the left atrium to the left ventricle. However, when the leaflets of the mitral valve do not close properly, a condition known as mitral valve regurgitation (MVR) can occur. This condition leads to the backflow of blood from the left ventricle into the left atrium, which can result in various complications, including heart failure and other cardiovascular issues. The procedure utilizes a device, such as the Viacor, Carillon XE, or Monarc, which is implanted into the coronary sinus. This device works by pushing the posterior mitral annulus anteriorly, effectively reducing the septal-lateral dimension of the mitral valve. The access for this procedure is achieved through a percutaneous approach via the femoral artery, allowing for minimally invasive intervention. During the procedure, imaging techniques such as fluoroscopy or ultrasound are employed to guide the placement of a guide catheter into the coronary sinus. Subsequently, a delivery catheter carrying the implant is advanced through the guide catheter to the targeted site. Once positioned, the device is deployed, featuring self-expanding anchors that draw the proximal coronary sinus and distal great cardiac vein closer together. This action indirectly displaces the posterior mitral annulus anteriorly, facilitating better approximation of the mitral valve leaflets and reducing the regurgitation of blood. Overall, this procedure represents a significant advancement in the treatment of mitral valve dysfunction, offering a less invasive option for patients with MVR.