Which of the following best describes the use of the Swan-Ganz catheter?

The use of the Swan-Ganz catheter is best described by its role in measuring pulmonary artery pressures and left atrial filling pressures. This specialized catheter is advanced into the pulmonary artery, allowing for the assessment of hemodynamics within the heart and lungs. By measuring these pressures, healthcare providers can evaluate a patient's cardiac function, fluid status, and response to treatment, which is crucial in managing conditions such as heart failure, pulmonary hypertension, and shock.

The Swan-Ganz catheter's ability to provide these measurements helps guide therapeutic interventions and monitor patient progress. The information obtained is vital in understanding the patient's volume status and cardiac output, enabling targeted treatment plans based on precise hemodynamic parameters.