CPT® Code 93598

Add-On Code

Cardiac output measurement(s), thermodilution or other indicator dilution method, performed during cardiac catheterization for the evaluation of congenital heart defects (List separately in addition to code for primary procedure)

The CPT® Code 93598 refers to the measurement of cardiac output using thermodilution or other indicator dilution methods, specifically performed during cardiac catheterization to evaluate congenital heart defects. This procedure is essential for assessing the dynamics of blood flow within the heart, particularly in patients with congenital anomalies. Cardiac output is defined as the volume of blood that the heart pumps into the systemic circulation each minute, which is a critical parameter in understanding cardiac function. The measurement can be conducted using different techniques, including dye dilution and thermal dilution, each with its specific methodology. In dye dilution studies, a dye is injected into the bloodstream, and its concentration is measured to determine cardiac output. Conversely, thermal dilution involves the injection of a cold or warm fluid, with temperature changes being monitored to calculate the output. Both methods provide valuable insights into the presence of intracardiac shunts and valvular regurgitation, which are common issues in congenital heart defects. The results from these measurements are crucial for guiding further treatment and management of patients with congenital heart conditions.