Indications for limited echocardiographic imaging: A mathematical model

Background: Few data exist on the magnitude of potential time savings obtained by using a limited echocardiographic (echo) imaging strategy on a referral population. Methods: A mathematical model of a limited echo screening strategy was devised that used as variables the length of the limited examination and the probability of detecting the referral diagnosis or a significant incidental finding, and assumed that any abnormality would mandate a full study. Data from prior echo population studies were used in the model as examples. Results: The model demonstrated a direct relation in time savings for populations with a low prevalence of disease and incidental findings. The model predicted that a limited echo imaging strategy could result in significant time savings when applied to certain specific referral populations. Conclusions: The time savings of a limited echo screening strategy can be modeled as a function of the length of the limited screen and the presence of significant findings. This model may provide the framework in which future prospective studies can confirm indications for limited echo.