Imperial College London
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DrNavtejChahal

Faculty of Medicine, National Heart & Lung Institute

Honorary Clinical Senior Lecturer
 
 
 
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navtej.chahal07

 
 
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Location

 

Royal BromptonRoyal Brompton Campus

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Summary

 

Publications

Citation

BibTex format

@article{Vamvakidou:2019:10.1016/j.jcmg.2018.01.011,
author = {Vamvakidou, A and Jin, W and Danylenko, O and Chahal, N and Khattar, R and Senior, R},
doi = {10.1016/j.jcmg.2018.01.011},
journal = {JACC: Cardiovascular Imaging},
pages = {1715--1724},
title = {Low transvalvular flow rate predicts mortality in patients with low-gradient aortic stenosis following aortic valve intervention},
url = {http://dx.doi.org/10.1016/j.jcmg.2018.01.011},
volume = {12},
year = {2019}
}
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TY  - JOUR
AB  - OBJECTIVES: This study aimed to assess the value of low transvalvular flow rate (FR) for the prediction of mortality compared with low stroke volume index (SVi) in patients with low-gradient (mean gradient: <40 mm Hg), low aortic valve area (<1 cm2) aortic stenosis (AS) following aortic valve intervention. BACKGROUND: Transaortic FR defined as stroke volume/left ventricular ejection time is also a marker of flow; however, no data exist comparing the relative prognostic value of these 2 transvalvular flow markers in patients with low-gradient AS who had undergone valve intervention. METHODS: We retrospectively followed prospectively assessed consecutive patients with low-gradient, low aortic valve area AS who underwent aortic valve intervention between 2010 and 2014 for all-cause mortality. RESULTS: Of the 218 patients with mean age 75 ± 12 years, 102 (46.8%) had low stroke volume index (SVi) (<35 ml/m2), 95 (43.6%) had low FR (<200 ml/s), and 58 (26.6%) had low left ventricular ejection fraction <50%. The concordance between FR and SVi was 78.8% (p < 0.005). Over a median follow-up of 46.8 ± 21 months, 52 (23.9%) deaths occurred. Patients with low FR had significantly worse outcome compared with those with normal FR (p < 0.005). In patients with low SVi, a low FR conferred a worse outcome than a normal FR (p = 0.005), but FR status did not discriminate outcome in patients with normal SVi. By contrast, SVi did not discriminate survival either in patients with normal or low FR. Low FR was an independent predictor of mortality (p = 0.013) after adjusting for age, clinical prognostic factors, European System for Cardiac Operative Risk Evaluation II, dimensionless velocity index, left ventricular mass index, left ventricular ejection fraction, heart rate, time, type of aortic valve intervention, and SVi (p = 0.59). CONCLUSIONS: In patients with low-gradient, low valve area aortic stenosis undergoi
AU  - Vamvakidou,A
AU  - Jin,W
AU  - Danylenko,O
AU  - Chahal,N
AU  - Khattar,R
AU  - Senior,R
DO  - 10.1016/j.jcmg.2018.01.011
EP  - 1724
PY  - 2019///
SN  - 1936-878X
SP  - 1715
TI  - Low transvalvular flow rate predicts mortality in patients with low-gradient aortic stenosis following aortic valve intervention
T2  - JACC: Cardiovascular Imaging
UR  - http://dx.doi.org/10.1016/j.jcmg.2018.01.011
UR  - https://www.ncbi.nlm.nih.gov/pubmed/29550315
UR  - http://hdl.handle.net/10044/1/59900
VL  - 12
ER  -
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