{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,8]],"date-time":"2025-11-08T12:20:05Z","timestamp":1762604405384,"version":"3.41.2"},"reference-count":29,"publisher":"Radcliffe Medical Media Ltd","license":[{"start":{"date-parts":[[2023,6,13]],"date-time":"2023-06-13T00:00:00Z","timestamp":1686614400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/legalcode"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Interv Cardiol"],"abstract":"<jats:p>Background: One of the limitations of the right radial access approach is complex vessel anatomy, such as subclavian tortuosity. Several clinical predictors have been proposed for tortuosities, such as older age, female sex and hypertension. In this study, we hypothesised that chest radiography would add predictive value to the traditional predictors. Methods: This prospective blinded study included patients who underwent transradial access coronary angiography. They were classified into four groups according to difficulty: Group I, Group II, Group III and Group IV. Different groups were compared according to clinical and radiographic characteristics. Results: The study included 108 patients (54, 27, 17 and 10 patients in Groups I, II, III and IV, respectively). The rate of crossover to transfemoral access was 9.26%. Age, hypertension and female sex were associated with a greater difficulty and failure rates. Regarding radiographic parameters, a higher failure rate was associated with a higher diameter of the aortic knuckle (Group IV, 4.09 \u00b1 1.32 cm versus Groups I, II and III combined, 3.26 \u00b1 0.98 cm; p=0.015) and the width of the mediastinum (Group IV, 8.96 \u00b1 2.88 cm versus Groups I, II and III combined, 7.28 \u00b1 1.78 cm; p=0.009). The cut-off value for prominent aortic knuckle was 3.55 cm (sensitivity 70% and specificity 67.35%) and the width of mediastinum was 6.59 cm (sensitivity 90% and specificity 42.86%). Conclusion: Radiographic prominent aortic knuckle and wide mediastinum are valuable clinical parameters and useful predictors for transradial access failure caused by tortuosity of the right subclavian\/brachiocephalic arteries or aorta.<\/jats:p>","DOI":"10.15420\/icr.2023.04","type":"journal-article","created":{"date-parts":[[2023,6,13]],"date-time":"2023-06-13T11:58:28Z","timestamp":1686657508000},"source":"Crossref","is-referenced-by-count":5,"title":["Clinical and Radiographic Predictors of Successful Coronary Angiography Through Right Radial Artery Access"],"prefix":"10.15420","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9831-3763","authenticated-orcid":false,"given":"Sohil","family":"Elfar","sequence":"first","affiliation":[{"name":"Cardiology Department, Faculty of Medicine, Port Said University, Port Said, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1138-1438","authenticated-orcid":false,"given":"Ahmed","family":"Onsy","sequence":"additional","affiliation":[{"name":"Cardiology Department, Faculty of Medicine, Ain\u00a0Shams University, Cairo, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohamed Amr","family":"Farouk","sequence":"additional","affiliation":[{"name":"Radiology Department, Medical Military Academy, Cairo, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"6096","published-online":{"date-parts":[[2023,6,13]]},"reference":[{"key":"ref0","doi-asserted-by":"publisher","unstructured":"Jolly SS, Yusuf S, Cairns J, et al. 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Usefulness of prominently projected aortic arch on chest radiograph to predict severe tortuosity of the right subclavian or brachiocephalic artery in patients aged >44 years undergoing coronary angiography with a right radial artery approach. Am J Cardiol 2012;110:203\u20137. https:\/\/doi.org\/10.1016\/j.amjcard.2012.03.012; PMID:\u00a022482860.","DOI":"10.1016\/j.amjcard.2012.03.012"},{"key":"ref28","doi-asserted-by":"publisher","unstructured":"Christensen EE, Landay MJ, Dietz GW, Brinley G. Buckling of the innominate artery simulating a right apical lung mass. 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