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Specialty: Radiology
Condition: Aortic Stenosis
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Total 35 results found since Jan 2013.
Dynamic aortic changes during the cardiac cycle in patients with aortic valve disease analyzed by computed tomography combined with PhyZiodynamics software
ConclusionThe ascending aortic diameter changes significantly in one heartbeat and differs depending on AR, age, and SV.Trial registration number17 − 006.Date of registrationMay 29, 2017 Retrospectively registered.
Source: The International Journal of Cardiovascular Imaging - July 15, 2023 Category: Radiology Source Type: research
Two wrongs sometimes do make a right: errors in aortic valve stenosis assessment by same-day Doppler echocardiography and 4D flow MRI
This study aims to systematically verify if the simplified geometry and flow profile of the left ventricular outflow tract (LVOT) assumed in 2D echocardiography is appropriate while examining the utility of 4D flow MRI to assess valvular disease. This prospective study obtained same-day Doppler echocardiography and 4D flow MRI in 37 healthy volunteers (age: 51.9 ± 18.2, 20 females) and 7 aortic stenosis (AS) patients (age: 64.2 ± 9.6, 1 female). Two critical assumptions made in echocardiography for aortic valve area assessment were examined, i.e. the assumption of (1) a circular LVOT shape and (2) a flat velocit...
Source: The International Journal of Cardiovascular Imaging - February 21, 2022 Category: Radiology Source Type: research
A novel approach to determine aortic valve area with phase-contrast cardiovascular magnetic resonance
Transthoracic echocardiography (TTE) is the diagnostic routine standard for assessing aortic stenosis (AS). However, its inaccuracies in determining stroke volume (SV) and aortic valve area (AVA) call for a mo...
Source: Journal of Cardiovascular Magnetic Resonance - January 6, 2022 Category: Radiology Authors: Felix Troger, Ivan Lechner, Martin Reindl, Christina Tiller, Magdalena Holzknecht, Mathias Pamminger, Christian Kremser, Johannes Schwaiger, Sebastian J. Reinstadler, Axel Bauer, Bernhard Metzler, Agnes Mayr and Gert Klug Tags: Research Source Type: research
Accuracy of stroke volume measurement with phase-contrast cardiovascular magnetic resonance in patients with aortic stenosis
Phase contrast (PC) cardiovascular magnetic resonance (CMR) in the ascending aorta (AAo) is widely used to calculate left ventricular (LV) stroke volume (SV). The accuracy of PC CMR may be altered by turbulent...
Source: Journal of Cardiovascular Magnetic Resonance - November 4, 2021 Category: Radiology Authors: Ezequiel Guzzetti, Hugo-Pierre Racine, Lionel Tastet, Myl ène Shen, Eric Larose, Marie-Annick Clavel, Philippe Pibarot and Jonathan Beaudoin Tags: Research Source Type: research
Echocardiography and EuroSCORE II for the stratification of low-gradient severe aortic stenosis and preserved left ventricular ejection fraction
AbstractThe purpose of this study was to explore the utility of echocardiography and the EuroSCORE II in stratifying patients with low-gradient severe aortic stenosis (LG SAS) and preserved left ventricular ejection fraction (LVEF ≥ 50%) with or without aortic valve intervention (AVI). The study included 323 patients with LG SAS (aortic valve area ≤ 1.0 cm2 and mean pressure gradient < 40 mmHg). Patients were divided into two groups: a high-risk group (EuroSCORE II ≥ 4%, n = 115) and a low-risk group (EuroSCORE II < 4%, n = 208). Echocardiographic and clinical characteristics w...
Source: The International Journal of Cardiovascular Imaging - August 14, 2021 Category: Radiology Source Type: research
Association Of Stroke With Pattern Of Aortic Leaflet And Left Ventricular Outflow Tract Calcifications
Introduction: Stroke is a feared complication of transcatheter aortic valve replacement (TAVR) used for treatment of severe aortic stenosis. The risk of stroke has been associated with leaflet calcification burden. We aimed to investigate whether a specific pattern of aortic leaflet and left ventricular outflow tract (LVOT) calcification is associated with stroke risk.
Source: Journal of Cardiovascular Computed Tomography - July 1, 2021 Category: Radiology Authors: D. Brito, M. Shotwell, P. Agrawal, S. Patibandla, M. Kadiyala, Y. Hamirani, R. Daggubati, B. Raybuck, A. Kawsara, I. Zeb Source Type: research
Impact of surgical aortic valve replacement on global and regional longitudinal strain across four flow gradient patterns of severe aortic stenosis
AbstractTo evaluate the impact of surgical aortic valve replacement (SAVR) on global (GLS) and regional longitudinal strain (RLS) across four flow-gradient patterns of severe aortic stenosis (AS) 3 months after surgery. A total of 103 patients with severe AS (aortic valve area < 1.0 cm2) were examined by speckle tracking echocardiography the day before SAVR and at 3-months follow-up. Patients were stratified into four flow-gradient patterns by stroke volume index (>35 mL/m2 vs. ≤35 mL/m2) and mean transaortic gradients (>40 mmhg vs. ≤40 mmhg): normal-flow, high gradient (NF/HG); low-flow, high ...
Source: The International Journal of Cardiovascular Imaging - February 19, 2021 Category: Radiology Source Type: research
Inadequately low left ventricular mass in patients with significant aortic stenosis predicts favourable prognostic outcomes
AbstractIn patients with significant aortic stenosis (AS), the prognostic effect of the increase in left ventricular mass (LVM) in relation to one ’s hemodynamic load has been described. Inappropriately high LVM has been shown to predict adverse cardiovascular events. However, little is known about the prognostic impact of inadequately low LVM (i-lowLVM) in patients with significant AS. I-lowLVM was defined as the measured LVM < 73% of the predicted LVM based on sex, stroke work and height from the reference adult population, used in previous established studies. For outcome analysis, the end-point was defined a...
Source: The International Journal of Cardiovascular Imaging - January 16, 2021 Category: Radiology Source Type: research
“Pure” severe aortic stenosis without concomitant valvular heart diseases: echocardiographic and pathophysiological features
ConclusionIn patients with “pure” AS according to current guidelines the presence of combined LVH, DD and PAH as accepted pathophysiological sequelae of severe AS cannot be confirmed. Probably, the detection of these secondary cardiac alterations might improve the diagnostic algorithm to avoid overestimation of AS severit y.
Source: The International Journal of Cardiovascular Imaging - September 15, 2020 Category: Radiology Source Type: research
Echocardiographic L-wave as a prognostic indicator in transcatheter aortic valve replacement
This study applies L-wave measurements of mid-diastolic trans-mitral flow. Although considered to be a marker of elevated filling pressure or delayed myocardial relaxation, its clinical and prognostic value is yet to be completely elucidated. It has been shown that transcatheter aortic valve replacement (TAVR) induces reverse remodeling and improves diastolic function and prognosis in patients with severe aortic stenosis (AS). Our purpose was to evaluate the prognostic value of L-wave following TAVR. We examined clinical and echocardiographic data of patients undergoing TAVR. L-Wave presence and velocity were recorded at b...
Source: The International Journal of Cardiovascular Imaging - September 15, 2020 Category: Radiology Source Type: research
Does the severity of low-gradient aortic stenosis classified by computed tomography –derived aortic valve calcification determine the outcome of patients after transcatheter aortic valve implantation (TAVI)?
ConclusionsThe severity of LG-AS based on AVC has no impact on 1-year prognosis once TAVI has been performed.Key Points• Aortic valve calcification (AVC) determined by computed tomography has emerged as a complementary measure of aortic stenosis (AS) severity and is of prognostic value in selected patients.• Patients with inconsistent echocardiographic measures can be classified as having severe or nonsevere AS by the computed tomography–derived AVC score.• The prognostic value of AVC in patients with low-gradient AS is abrogated after correction of afterload by TAVI.
Source: European Radiology - August 7, 2020 Category: Radiology Source Type: research
Significant aortic stenosis associated with poorer functional outcomes in patients with acute ischaemic stroke undergoing endovascular therapy.
Authors: Ngiam NJ, Tan BY, Sia CH, Chan BP, Anil G, Cunli Y, Holmin S, Anderssen T, Poh KK, Yeo LL, Sharma VK
PMID: 32340516 [PubMed - as supplied by publisher]
Source: Interventional Neuroradiology - April 29, 2020 Category: Radiology Tags: Interv Neuroradiol Source Type: research
Left ventricular mechanical dispersion in flow-gradient patterns of severe aortic stenosis with narrow QRS complex
AbstractPatients with severe aortic stenosis are classified according to flow-gradient patterns. We investigated whether left ventricular (LV) mechanical dispersion, a marker of dyssynchrony and predictor of mortality, is associated with low-flow status in aortic stenosis. 316 consecutive patients with aortic stenosis and QRS duration < 120 ms were included in the retrospective analysis. Patients with severe aortic stenosis (aortic valve area ≤ 1.0 cm2) were classified as normal-flow (NF; stroke volume index > 35 ml/m2) high-gradient (HG; mean transvalvular gradient ≥ 40 mmHg) (n = 79...
Source: The International Journal of Cardiovascular Imaging - January 12, 2020 Category: Radiology Source Type: research
