Doppler-derived left ventricular negative dp/dt as a predictor of atrial fibrillation or ischemic stroke in patients with degenerative mitral regurgitation and normal ejection fraction

Yi, J.E.; Chin, Joana; Lee, D.H.; Ej, Canabal; Jeon, Hui Kyung; Jung, Hae Ok; Youn, Ho Joong

doi:10.1093/eurheartj/eht307.p279

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a consequence, in arrhythmia-especially AF-all gradients, velocities, velocity integrals, or their derivatives should not be used as parameters of first choice when investigating mitral valve prosthetic function [12,[31][32][33][34].…”

Section: Va To Evaluate Prosthetic Functionmentioning

confidence: 99%

“…Selection of the formula to calculate VA (CE versus PHT) is recommended depending on rhythm [31][32][33]. The time consumption in case of applying the PHT 220 is minimal as it is included in every echo-system calculation module; the investigator only needs to reduce the value by 1 cm 2 to compare with CE VTI .…”

Section: Recommended Algorithm To Investigate MV Prostheses Including Vamentioning

confidence: 99%

See 1 more Smart Citation

Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method

et al. 2015

View full text Add to dashboard Cite

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 cm(2) 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.

show abstract

Section: Va To Evaluate Prosthetic Functionmentioning

confidence: 99%

Section: Recommended Algorithm To Investigate MV Prostheses Including Vamentioning

confidence: 99%

Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method

et al. 2015

View full text Add to dashboard Cite

show abstract

Doppler-derived left ventricular negative dp/dt as a predictor of atrial fibrillation or ischemic stroke in patients with degenerative mitral regurgitation and normal ejection fraction

Cited by 1 publication

References 0 publications

Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method

Echocardiographically derived effective valve opening area in mitral prostheses: a comparative analysis of various calculations using continuity equation and pressure half time method

Contact Info

Product

Resources

About