Cardiac nuclear imaging uses radioactive materials (tracers) to obtain diagnostic images of the heart and vessels. Testing involves giving a tiny amount of a tracer to a patient. The tracer collects in the heart and gives off gamma rays, which are detected by a gamma camera. Skilled nuclear medicine technologists perform the tests, which are interpreted by experienced Medical College of Wisconsin nuclear medicine physicians.

The two main types of cardiac nuclear imaging tests are: 
  • Multiple Gated Acquisition (MUGA) — measures how much blood the heart pumps or “ejects” with each contraction (the ejection fraction) and how quickly that blood is ejected. 
  • Nuclear medicine stress test (also called myocardial perfusion imaging) — evaluates the coronary arteries by determining changes in blood flow to the heart during exercise. 

Learn more about other heart and vascular diagnostic tests we offer.

Our Cardiovascular Program continues to receive recognition as one of the top programs nationally. We are honored to provide high-quality, effective care for even the most high-risk patients.

  • In its 2024 Specialty Excellence Awards, Healthgrades recognized Froedtert Hospital as one of America’s 50 Best Hospitals for Cardiac Surgery, one of America’s 100 Best Hospitals for Cardiac Care and one of America’s 100 Best Hospitals for Coronary Intervention, as well as other specialty achievements in various areas.

    Froedtert Hospital was named one of the nation’s 50 Top Cardiovascular Hospitals™ by Fortune and PINC AI™. Froedtert Hospital demonstrated significantly higher survival rates associated with cardiac care, with fewer readmissions and complications. To select top performers, an objective, independent, quantitative research analysis was performed using publicly available data measuring cardiac care in the U.S. Those in the top 50 operated at a lower cost and had better outcomes, had significantly higher inpatient survival rates, fewer patients with complications, lower readmission rates and spent up to $5,076 less in total costs per patient case. If all hospitals operated at the level of the top 50, there would be 7,600 fewer deaths due to heart disease, 6,700 fewer patients with complications and more than $1 billion saved each year, according to the analysis.

    The Society for Vascular Surgery's Vascular Quality Initiative (SVS VQI) has awarded Froedtert Hospital three out of three stars for its active participation in the Registry Participation Program. The mission of the SVS VQI is to improve patient safety and the quality of vascular care delivery by providing web-based collection, aggregation and analysis of clinical data submitted in registry format for all patients undergoing specific vascular treatments. The VQI operates 14 vascular registries.

    The American Heart Association recognized Froedtert Hospital with its Get With the Guidelines® Heart Failure Gold Plus Award. In addition, the hospital was recognized on the AHA’s Target: Heart Failure(SM) Honor Roll and received the AHA’s Target: Type 2 Diabetes Honor Roll™ award. 

    The American Heart Association also recognized Froedtert Hospital with its Get With the Guidelines® — Coronary Artery Disease Mission: Lifeline STEMI Receiving Silver Plus and Mission: Lifeline NSTEMI Silver awards. These awards demonstrate our commitment to improving care by adhering to the latest treatment guidelines and streamlining processes to ensure timely and proper care for heart attacks.

    The American Heart Association recognized Froedtert Hospital with its Get With the Guidelines® AFib Gold Award.

    ​The Cardiovascular Intensive Care Unit (CVICU) and Neurosurgical Intensive Care Unit (NICU) at Froedtert Hospital have each received a silver-level Beacon Award for Excellence from the American Association of Critical-Care Nurses. This award recognizes unit caregivers who successfully improve patient outcomes and align practices with AACN’s six Healthy Work Environment Standards. Receiving this national three-year award with gold, silver and bronze designations, marks a significant milestone on the path to exceptional patient care and achieving a healthy work environment.