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Accuracy of Transesophageal Echocardiography for Ident Left Atrial Thrombi:Prospective, Intraop Study Ann Int Med 123:817-822, 8821995., Manning,W.J.,et al, 1995 See this aricle in Pubmed Article Abstract Transeophageal echocardiography identified 14 left atrial thrombi in 14 patients(6%).Thrombus size ranged from 3 to 80 mm.Surgery confirmed 12 of 14 thrombi(86%),including 9 thrombi confined to the left appendage.No additional thrombi were found on direct inspection of the atria (sensitivity,100%[95%CI,74%to 100%];specificity,99%[CI,97%to 99.9%]; positive predictive value,86%[12/14];negative predictive value,100%[217/ 217];for a population that had a 5.2%prevalence of thrombi).All 12 surgically confirmed thrombi were identified by two independent observers. Neither thrombus seen by only a single observer on transesophageal echocardiography was confirmed during direct inspection of the atria at surgery.Transesophageal echocardiography is highly accurate for identifying left atrial thrombi and can be used clinically to exclude left atrial thrombi.

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