Effects of a Program to Reduce Unnecessary Echocardiograms and Nuclear Stress Tests for Cardiopulmonary Complaints in an Emergency Department-Run Observation Unit

Introduction Inappropriate use of echocardiograms and stress tests with nuclear components in the evaluation of cardiopulmonary complaints (chest pain, dyspnea/shortness of breath (SOB), dizziness, and syncope) is common, despite Cardiology society guidelines for appropriate use. Such overuse raises healthcare costs, impairs the availability of resources for other patients, and exposes patients to radiation unnecessarily. Our Emergency Department (ED) runs an observation unit that sees thousands of patients annually with cardiopulmonary complaints. We observed many have echocardiograms and stress tests with nuclear components without indications for either. Working with our Department of Cardiology, we promoted guidelines for appropriate use of echocardiograms and stress tests with nuclear components in the evaluation of such patients. Methods We collected 2024 and 2025 data regarding OU admissions. Patents were included if they were [≥]18 years, in the ED OU between 1/1/24 and 12/31/25, aad an OU admission complaint of chest pain, dyspnea/SOB, dizziness, and syncope. We calculated the percent of patients with such presentations who received either an echocardiogram or a stress test with a nuclear component. We then compared the 2024 (pre-implementation) data with full-year data from the first full year of implementation (2025). Results After introducing educational guidelines, there were statistically-significant reductions in nuclear stress tests ordered for dyspnea/SOB (absolute reduction 9.3%; p = 0.0009) and overall usage of nuclear stress tests (absolute reduction 2.4%; p = 0.0095). This was offset by increases in echocardiograms ordered for chest pain (absolute increase 3.7%; p = 0.005) and overall usage of echocardiograms (absolute increase 2.0%; p = 0.0454). There was no net change in the overall use of echocardiograms and nuclear stress tests when considered together: 85.2% of patients had one or the other study in 2024 vs. 84.8% in 2025; p = 0.5768. Discussion Introducing and promoting appropriate-use guidelines for echocardiograms and stress tests with nuclear components in the evaluation of cardiopulmonary complaints was associated with a reduction in unnecessary nuclear stress tests, but not echocardiograms. Success of this program to reduce nuclear stress tests may be attributed to several factors. First, the relevant specialties (emergency medicine, cardiology) were engaged. Second, we relied on guidelines adopted by professional organizations. Third, the initiative corresponds to nationwide efforts to decrease cost of care by providing evidence-based diagnostic and treatment management. Failure to reduce echocardiograms may be due to a well-documented multi-year time lag between changes in medical knowledge and wide-scale adoption; failure to develop the guidelines in collaboration with house staff and mid-level providers and promote them at multiple times and venues in a multi-modal manner; and utilize Department leadership to promote their usage.