Abstract

Revised Appropriate Use Criteria (AUC) for Echocardiography were published in 2011 and classify potential procedure indications as appropriate (score of 7 to 9), uncertain (score of 4 to 6), or inappropriate (score of 1 to 3). The appropriate utilization rate of transthoracic echocardiography in clinical practice using the revised AUC is unknown. The aim of the present study was to determine the appropriate utilization rate of echocardiography in a large number of consecutive studies in clinical practice and to determine the number of "unclassifiable" studies using the revised and expanded AUC. The clinical indication for transthoracic echocardiography (TTE) was determined on the basis of a detailed review of preprocedural clinical documentation. These clinical indications were further classified (when possible) into 1 of the 98 indications described in the 2011 AUC for echocardiography. From December 2010 to January 2011, 1,825 patients (mean age 63.2 years) underwent TTE for clinical reasons. Of the final study group of 1,820 patients, TTE was appropriate in 82%, inappropriate in 12.3%, and uncertain in 5.3%, and 0.4% studies were unclassifiable. The evaluation of symptoms potentially due to a cardiac etiology was the most common appropriate indication for TTE (27.5%). The most common inappropriate indication was routine surveillance (<1 year) of heart failure without a change in clinical status (2.5%). In conclusion, most TTE studies were appropriately ordered, and only a very small number of studies were unclassifiable.

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