Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ijcard.2005.04.027
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dc.titleTransesophageal echocardiography during mitral valve repair underestimates mitral valve area by pressure half-time calculation
dc.contributor.authorPoh, K.-K.
dc.contributor.authorHong, E.C.-T.
dc.contributor.authorYang, H.
dc.contributor.authorLim, Y.-T.
dc.contributor.authorYeo, T.-C.
dc.date.accessioned2016-11-17T08:38:46Z
dc.date.available2016-11-17T08:38:46Z
dc.date.issued2006-04-04
dc.identifier.citationPoh, K.-K., Hong, E.C.-T., Yang, H., Lim, Y.-T., Yeo, T.-C. (2006-04-04). Transesophageal echocardiography during mitral valve repair underestimates mitral valve area by pressure half-time calculation. International Journal of Cardiology 108 (2) : 177-180. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ijcard.2005.04.027
dc.identifier.issn01675273
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/130574
dc.description.abstractBackground: Mitral valve repair (MVRr) has become the mainstay of surgical treatment for mitral valvular regurgitation. Evaluation of MVRr by intraoperative transesophageal echocardiography (IOE) has been routinely employed to guide the operation. While the main objective of IOE is to assess for residual mitral regurgitation, it is also important to exclude significant mitral stenosis. Utilisation of pressure half-time (PHT) to estimate mitral valve area (MVA) has been shown to be reliable in normal clinical situations. However, in MVRr, the accuracy of MVA calculation by PHT needs to be ascertained. Methods and results: Data from IOE and post-MVRr transthoracic echocardiography (TTE) from the year 1998 to 2002 were analysed and when required, offline PHT measurements were made. The mean time interval between the two echocardiographic examinations was 10.6 (1 to 56) weeks. In our 36 cases, the IOE MVA was found to be 2.1 ± 0.5 cm 2, with the corresponding TTE MVA to be 2.7 ± 1.0 cm 2. MVA by PHT with IOE underestimated TTE findings by 0.6 ± 0.9 cm 2 (95% CI: - 0.85 to - 0.24, P = 0.001). In 6 patients, the IOE MVA was moderately reduced. Subsequent TTE in these patients showed that the MVA was adequate and was significantly underestimated by IOE in 5 of these patients. In all these cases, IOE underestimated MVA by a margin, which may result in a need to revise the repair. Conclusion: We find that IOE immediately after MVRr tends to underestimate MVA by PHT calculation. The underestimation by IOE may have clinical importance in cases when MVA by IOE is moderately reduced. Therefore, pressure half-time measurement should not be used to assess mitral valve areas during mitral valve repair. © 2005 Elsevier Ireland Ltd. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.ijcard.2005.04.027
dc.sourceScopus
dc.subjectIntraoperative echocardiography
dc.subjectMitral valve repair
dc.subjectPressure half-time method
dc.typeArticle
dc.contributor.departmentMEDICINE
dc.description.doi10.1016/j.ijcard.2005.04.027
dc.description.sourcetitleInternational Journal of Cardiology
dc.description.volume108
dc.description.issue2
dc.description.page177-180
dc.description.codenIJCDD
dc.identifier.isiut000236606900005
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