Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method
Bogunovic N, Horstkotte D, Faber L, Bogunovic L, van Buuren F (2016)
Heart and Vessels 31(6): 932-938.
Zeitschriftenaufsatz
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Autor*in
Bogunovic, Nikola;
Horstkotte, Dieter;
Faber, Lothar;
Bogunovic, LukasUniBi;
van Buuren, Frank
Abstract / Bemerkung
Detection of dysfunctional mitral valve prostheses (MP) remains complex even though being optimized by considering echocardiographically derived prosthetic effective orifice area (VA). The purpose was to compare VA in MP, calculated by the continuity equation (CE) using peak velocities (CEVpeak), mean velocities (CEVmean), velocity–time integrals (CEVTI) and the pressure half time method using 220 ms as constant first (PHT220) as well as optimized constants. In 267 consecutive patients with normally functioning MP, we investigated VA within the first postoperative month. With increasing prosthetic sizes, mean VA values also increase in all calculations. The statistical curves demonstrate no significant difference in graphical steepness but show different levels. Comparison of mean VA showed the known systematic higher values of PHT220 and significantly decreased results when using CEVTI. This systematic difference between mean VA applying PHT220 versus CEVTI is approximately 1.0 cm2 for all prosthetic sizes. Calculations via CEVpeak were close to the results of CEVTI. CEVmean produced values, which graphically correspond to the PHT220 curve. Only PHT220 detected the constructional equal prosthetic inner ring width between 29 and 31 mm. To compensate the systematic difference between CEVTI and PHT220, an optimized constant of 140 ms was calculated to be applied in PHT (PHT140). VA is a robust and, therefore, preferable parameter for investigating MP. If needed, both CE and PHT are applicable with a systematical difference between CEVTI and PHT220. An optimized constant of 140 ms (PHT140) should be applied when calculating VA of mitral valve prostheses via PHT.
Stichworte
Echocardiography Hemodynamics Valve prosthesis Effective opening area Pressure half time Continuity equation
Erscheinungsjahr
2016
Zeitschriftentitel
Heart and Vessels
Band
31
Ausgabe
6
Seite(n)
932-938
ISSN
0910-8327
eISSN
1615-2573
Page URI
https://pub.uni-bielefeld.de/record/2759025
Zitieren
Bogunovic N, Horstkotte D, Faber L, Bogunovic L, van Buuren F. Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method. Heart and Vessels. 2016;31(6):932-938.
Bogunovic, N., Horstkotte, D., Faber, L., Bogunovic, L., & van Buuren, F. (2016). Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method. Heart and Vessels, 31(6), 932-938. doi:10.1007/s00380-015-0690-0
Bogunovic, Nikola, Horstkotte, Dieter, Faber, Lothar, Bogunovic, Lukas, and van Buuren, Frank. 2016. “Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method”. Heart and Vessels 31 (6): 932-938.
Bogunovic, N., Horstkotte, D., Faber, L., Bogunovic, L., and van Buuren, F. (2016). Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method. Heart and Vessels 31, 932-938.
Bogunovic, N., et al., 2016. Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method. Heart and Vessels, 31(6), p 932-938.
N. Bogunovic, et al., “Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method”, Heart and Vessels, vol. 31, 2016, pp. 932-938.
Bogunovic, N., Horstkotte, D., Faber, L., Bogunovic, L., van Buuren, F.: Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method. Heart and Vessels. 31, 932-938 (2016).
Bogunovic, Nikola, Horstkotte, Dieter, Faber, Lothar, Bogunovic, Lukas, and van Buuren, Frank. “Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method”. Heart and Vessels 31.6 (2016): 932-938.
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