2007 ICD-9-CM Procedure 89.64 Pulmonary artery wedge monitoring Placement of a balloon-tipped catheter into the pulmonary artery through the antecubital, subclavian, and sometimes the femoral vein. It is used to measure pulmonary artery pressure and pulmonary artery wedge pressure which reflects left atrial pressure and left ventricular end-diastolic pressure. The catheter is threaded into the right atrium, the balloon is inflated and the catheter follows the blood flow through the tricuspid valve into the right ventricle and out into the pulmonary artery. 89.64 is a specific code that can be used to specify a procedure 89.64 contains 4 index entries View the full Volume 3 89.* hierarchy 89.64 also known as: Pulmonary capillary wedge [PCW] monitoring Swan-Ganz catheterization Index entries containing 89.64: Catheterization -- see also Insertion, catheter Swan-Ganz (pulmonary) 89.64 Insertion catheter Swan-Ganz (pulmonary) 89.64 Swan-Ganz catheter (pulmonary) 89.64 Monitoring pulmonary artery wedge 89.64