{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,3,20]],"date-time":"2025-03-20T04:18:46Z","timestamp":1742444326632,"version":"3.40.1"},"reference-count":0,"publisher":"California Digital Library (CDL)","issue":"2","license":[{"start":{"date-parts":[[2025,2,25]],"date-time":"2025-02-25T00:00:00Z","timestamp":1740441600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Western Journal of Emergency Medicine"],"abstract":"<p>Introduction: Assessing cardiac function is crucial for managing acute dyspnea. In this study we aimed to evaluate displacement of the aortic root (DAR) as a method for calculating ejection fraction (EF) in patients with undifferentiated dyspnea presenting to the emergency department (ED). The primary objective was to compare EF values obtained through DAR with the modi\ufb01ed Simpson method, which is considered the criterion reference, within an Indian academic ED. Methods: We conducted a prospective, cross-sectional study spanning two years (December 2019\u2013December 2021). The study enrolled 110 consecutive ED patients \u226518 years of age, presenting with undifferentiated dyspnea and normal sinus rhythm. Ultrasound-trained investigators measured DAR using M-mode ultrasonography. Experienced echocardiographers, blinded to DAR, determined EF using the modi\ufb01ed Simpson method. Statistical analyses included the Shapiro-Wilk test, McNemar test, and the receiver operating characteristic curve. Results: The mean DAR measurement was 0.781 centimeters, with an average calculated EF of 54.4%. The EF calculated using DAR did not differ signi\ufb01cantly from EF calculated using the modi\ufb01ed Simpson method. Comparative analysis revealed DAR\u2019s superior sensitivity (86.21%) compared to mitral annular plane systolic excursion (48.28%) and end-point septal separation (45.45%). The DAR method exhibited high accuracy (area under the curve = 0.958) with a cut-off value 0.706 (sensitivity 88.7%, speci\ufb01city 93.1%). Conclusion: Evaluating displacement of the aortic root to calculate ejection fraction in undifferentiated dyspnea demonstrated high accuracy, sensitivity, and agreement with the modi\ufb01ed Simpson method, which is considered the criterion reference. Its simplicity and non-invasiveness makes it a valuable initial screening tool in emergency settings, with the potential to reshape cardiac assessment approaches and optimize patient care pathways in the ED. <\/p>","DOI":"10.5811\/westjem.19394","type":"journal-article","created":{"date-parts":[[2025,2,25]],"date-time":"2025-02-25T16:21:43Z","timestamp":1740500503000},"source":"Crossref","is-referenced-by-count":0,"title":["Unlocking Cardiac Insights: Displacement of Aortic Root for Calculation of Ejection Fraction in Emergency Department in India"],"prefix":"10.5811","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4149-5022","authenticated-orcid":false,"given":"Sudhi","family":"Manu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9949-1158","authenticated-orcid":false,"given":"Gopinathan","family":"Vivek","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8507-5698","authenticated-orcid":false,"given":"Asanaru Kunju","family":"Sanjan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9095-5596","authenticated-orcid":false,"given":"A.","family":"Ajay","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8621-092X","authenticated-orcid":false,"given":"S.","family":"Nisarg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mymbilly Balakrishnan","family":"Jayaraj","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0314-0549","authenticated-orcid":false,"given":"T.R.","family":"Aishwarya","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9282-5450","authenticated-orcid":false,"given":"Mohammad","family":"Khalid","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0570-3261","authenticated-orcid":false,"given":"S.","family":"Chetana","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"29705","published-online":{"date-parts":[[2025,2,25]]},"container-title":["Western Journal of Emergency Medicine"],"original-title":[],"link":[{"URL":"https:\/\/escholarship.org\/content\/qt8td4w610\/qt8td4w610.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,3,19]],"date-time":"2025-03-19T18:48:54Z","timestamp":1742410134000},"score":1,"resource":{"primary":{"URL":"https:\/\/escholarship.org\/uc\/item\/8td4w610"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,2,25]]},"references-count":0,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2025,3,13]]}},"URL":"https:\/\/doi.org\/10.5811\/westjem.19394","relation":{},"ISSN":["1936-9018"],"issn-type":[{"type":"electronic","value":"1936-9018"}],"subject":[],"published":{"date-parts":[[2025,2,25]]}}}