Fig. 2From: Impact of a structured referral algorithm on the ability to monitor adherence to appropriate use criteria for transthoracic echocardiographyPrevalence of unclassifiable free-form-text requisitions by ACCF 2011 AUC category (n = 268). CV, cardiovascular; HTN, hypertension; HF, heart failure; CM, cardiomyopathy; ACHD, adult congenital heart diseaseBack to article page