2024-03-28T12:45:38Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/793602022-11-17T02:08:08Zhdl_2115_20040hdl_2115_121Risk factors for residual mitral regurgitation after aortic valve replacement in patients with severe aortic valve stenosis and moderate mitral regurgitationShingu, YasushigeIwano, HiroyukiMurakami, TatsuyaKatoh, NobuyasuOoka, TomonoriKatoh, HirokiKubota, SuguruMatsui, YoshiroAortic valve stenosisMitral regurgitation490Objectives While it was reported that patients with residual moderate mitral regurgitation (MR) after surgical aortic valve replacement (SAVR) had a poorer prognosis than those without it, the risk factors for residual MR have not been fully elucidated. The aim of the study was to evaluate risk factors for residual MR after SAVR. Methods Of the 222 patients who underwent isolated SAVR from 2001 to 2018, 33 (11 men; age: 74 +/- 7 years) had functional moderate MR before surgery. The risk factors for residual MR were evaluated by comparing patients with residual moderate MR (n = 11, 33%) with those who exhibited improved post-surgery MR (n = 22, 67%). Results The left atrial diameter was significantly larger in the residual MR group (51 +/- 7 mm) than in the improved MR group (46 +/- 5 mm; P = 0.049). The mean pressure gradient at the aortic valve was significantly smaller in the residual MR group (52 +/- 18 mmHg) than in the improved MR group (69 +/- 22 mmHg; P = 0.043). A ratio of left atrial diameter (mm) and mean aortic valve pressure gradient (mmHg) greater than 0.9 predicted residual MR with a sensitivity of 70% and a specificity of 74% (area under the ROC curve: 0.779; P = 0.015). Conclusions In patients with severe aortic valve stenosis and moderate MR, a high ratio of preoperative left atrial diameter and mean aortic valve pressure gradient would be a parameter predicting residual moderate MR post-SAVR.SpringerJournal Articleapplication/pdfhttp://hdl.handle.net/2115/79360https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/79360/1/Gen%20Thorac%20Cardiovasc%20Surg_67%2810%29_849.pdf1863-6705General thoracic and cardiovascular surgery678498542019-10enginfo:doi/10.1007/s11748-019-01110-wThis is a post-peer-review, pre-copyedit version of an article published in General thoracic and cardiovascular surgery. The final authenticated version is available online at: https://doi.org/10.1007/s11748-019-01110-wauthor