Study on Electrocardiogram Frequency and Impact

Introduction to Low-Value Care

A recent study examined the frequency of annual electrocardiograms (ECGs) and their effects on subsequent cardiac testing among healthy, low-risk patients. Low-value care is defined by a lack of benefit or an imbalance between its benefits and potential risks, leading to higher healthcare costs, patient inconvenience, and, in some cases, harm. One prominent example of low-value care is the routine administration of resting ECGs in low-risk patients—those without any prior cardiac medical history—during annual health examinations (AHEs).

Guidelines Against Routine Screening

Five years ago, the United States Preventive Services Task Force (USPSTF) recommended against routine ECG screening for low-risk patients due to insufficient evidence supporting its benefits. As policymakers aim to enhance meaningful prevention strategies and minimize low-value care, it is crucial to accurately assess its utility, costs, and impact on patient outcomes.

Research Background

Previous studies have estimated the frequency of ECGs in select low-risk patient groups; however, the broader population’s ECG usage and its implications for costs and patient outcomes remained largely unexplored. A recent paper published in JAMA Internal Medicine sought to determine how often ECGs were ordered following an AHE in low-risk patients and whether these tests correlated with additional cardiac evaluations, consultations, or patient outcomes.

Study Methodology

Conducted between 2010 and 2015, this retrospective cohort study utilized data from administrative healthcare databases in Ontario, Canada. It focused on low-risk primary care patients and evaluated specific outcomes of interest. The primary outcome measured was the occurrence of subsequent cardiac testing or consultations with a cardiologist, while secondary outcomes included mortality, hospitalization, and revascularization within 12 months.

Patient Demographics and Findings

All eligible participants were aged 18 or older, had no prior cardiac medical history or risk factors, and underwent an AHE. A total of 3,629,859 adult patients received at least one AHE during the study period. Of these, 21.5% underwent an ECG within 30 days after their AHE; however, the rates varied significantly among the 8,036 primary care physicians, ranging from 1.1% to 94.9%.

The study concluded that patients who received an ECG were five times more likely to undergo additional cardiac testing or consultations than those who did not. Notably, the overall cardiac event rate—encompassing death, hospitalization, or revascularization—was low in both groups, indicating that the ECG did not influence patient outcomes.

Implications of the Findings

The results highlight that ECG testing after an AHE is a prevalent practice, despite existing guidelines against it, with considerable variability among primary care physicians. While routine ECG testing appears to elevate the likelihood of subsequent cardiac evaluations, the overall cardiac event rate remains minimal.

These findings carry significant implications for healthcare policy. They reveal that even low-cost procedures, such as ECGs for low-risk patients, are frequently performed and often lead to more advanced, costly testing, despite a lack of substantial benefits for patients. The study underscores the necessity for further research to identify types of low-value care and evaluate their effects on patient health outcomes, ultimately aiming to create a more efficient and effective primary healthcare system.

Conclusion

This study reinforces the importance of critically assessing healthcare practices to minimize low-value care and enhance patient outcomes.

Reference

Bhatia, R. S., Bouck, Z., Ivers, N. M., Mecredy, G., Singh, J., Pendrith, C., … & Wilson, L. (2017). Electrocardiograms in Low-Risk Patients Undergoing An Annual Health Examination. JAMA Internal Medicine.