Clinical and echocardiographic features of paradoxical low-flow and normal-flow severe aortic stenosis patients with concomitant mitral regurgitation

AbstractMitral regurgitation (MR) coexists in a significant proportion of patients with severe aortic stenosis (AS), and portends inferior therapeutic outcomes. In severe AS, MR is thought to contribute to a low-flow state by decreasing forward stroke volume. We investigated concomitant MR on the clinical and echocardiographic features of patients with “paradoxical” low-flow (PLF) and normal-flow (NF) severe AS. Clinical and echocardiographic profiles of 886 consecutive patients with index echocardiographic diagnosis of severe AS (AVA 
Source: The International Journal of Cardiovascular Imaging - Category: Radiology Source Type: research

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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    35 ml/m2) high-gradient (HG; mean transvalvular gradient  ≥ 40 mmHg) (n = 79), NF low-gradient (LG) (n = 62), low-flow (LF) LG ejection fraction (EF) ≥ 50% (n = 57), and LF LG EF 
Source: The International Journal of Cardiovascular Imaging - Category: Radiology Source Type: research
To assess the impact of stroke volume index (SVI) and left ventricular ejection fraction (LVEF) on prognosis in patients with severe aortic stenosis, comparing those undergoing transcatheter aortic valve replacement (TAVR) and those with surgical AVR (SAVR).
Source: Mayo Clinic Proceedings - Category: Internal Medicine Authors: Tags: Original article Source Type: research
Publication date: January 2020Source: Canadian Journal of Cardiology, Volume 36, Issue 1Author(s): Mohammad Alkhalil, Paul Brennan, Conor McQuillan, Reuben Jeganathan, Ganesh Manoharan, Colum G. Owens, Mark S. SpenceAbstractBackgroundTools are needed to identify patients at increased risk after transcatheter aortic valve replacement (TAVR). Indexed stroke volume (SVi) is an echocardiographic measurement that is used for low-gradient aortic stenosis. We studied whether low SVi is a high-risk marker in patients with high-gradient aortic stenosis (HG-AS) and assessed the relationship between SVi and left ventricle (LV) systol...
Source: Canadian Journal of Cardiology - Category: Cardiology Source Type: research
CONCLUSIONS: Our meta-analysis indicates that, in the short term, TAVI probably has little or no mortality difference compared to SAVR for severe AS in individuals with low surgical risk. Similarly, there is probably little or no difference in risk of stroke, MI, and cardiac death between the two approaches. TAVI may reduce the risk of rehospitalisation, but we are uncertain about the effects on LOS. TAVI reduces the risk of atrial fibrillation, AKI, and bleeding. However, this benefit is offset by the increased risk of PPM implantation. Long-term follow-up data are needed to further assess and validate these outcomes, esp...
Source: Cochrane Database of Systematic Reviews - Category: General Medicine Authors: Tags: Cochrane Database Syst Rev Source Type: research
ConclusionsThis analysis shows that there are 3 distinct phases of cost accumulation from referral to post-TAVR with some potentially modifiable cost drivers in each phase.
Source: Canadian Journal of Cardiology - Category: Cardiology Source Type: research
TRANSCATHETER aortic valve implantation (TAVI) is a less invasive alternative to surgical aortic valve replacement in high-risk patients with severe aortic stenosis. However, there are increasing concerns about the potential complications of TAVI now that its indications have been expanded to include patients with low-to-intermediate surgical risk.1,2 One of the serious complications of TAVI is stroke. It is known that there is an increase in 30-day mortality, rates of respiratory insufficiency and postprocedural delirium, and duration of hospital stay if stroke occurs.
Source: Journal of Cardiothoracic and Vascular Anesthesia - Category: Anesthesiology Authors: Tags: Case Report Source Type: research
Publication date: January 2020Source: The Annals of Thoracic Surgery, Volume 109, Issue 1Author(s): Mostafa R. Amer, Wassim Mosleh, Saurabh Joshi, Jeffery F. Mather, Wael El-Mallah, Mohiuddin Cheema, Raymond G. McKayBackgroundPrevious reports described successful use of transcarotid and transsubclavian approaches for the performance of transcatheter aortic valve replacement (TAVR) in patients with severe aortic stenosis who cannot be treated with transfemoral access. The purpose of the present study was to compare these two alternative approaches with respect to safety, efficacy, and procedural efficiency.MethodsA retrospe...
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
AbstractAortic stenosis (AS) represents a major healthcare issue because of its ever-increasing prevalence, poor prognosis, and complex pathophysiology. Echocardiography plays a central role in providing a comprehensive morphological and hemodynamic evaluation of AS. The diagnosis of severe AS is currently based on three hemodynamic parameters including maximal jet velocity, mean pressure gradient (mPG) across the aortic valve, and aortic valve area (AVA). However, inconsistent grading of AS severity is common when the AVA is  
Source: Journal of Medical Ultrasonics - Category: Radiology Source Type: research
Differences in Flow-Gradient Patterns Between Severe Bicuspid Aortic Stenosis and Severe Tricuspid Aortic Stenosis - Mechanistic Insight From Multimodal Imaging. Circ J. 2019 Nov 30;: Authors: Kim D, Shim CY, Kim YJ, Nam K, Hong GR, Lee SH, Lee S, Ha JW Abstract BACKGROUND: We investigated the flow-gradient pattern characteristics and associated factors in severe bicuspid aortic stenosis (AS) compared with severe tricuspid AS.Methods and Results:A total of 252 patients with severe AS (115 bicuspid vs. 137 tricuspid) who underwent aortic valve (AV) replacement were retrospectively analyzed. Patie...
Source: Circulation Journal - Category: Cardiology Authors: Tags: Circ J Source Type: research
This article reviews the current data on TAVR in low-risk patients with severe, symptomatic aortic stenosis, highlights the results of the recently published Medtronic Low Risk Randomized Study and PARTNER 3 trials, and describes specific clinical, anatomic, and procedural considerations regarding the optimal treatment choice in this population.Recent FindingsIn low-risk patients, the Medtronic Low Risk Randomized Study demonstrated TAVR to be non-inferior to surgery with respect to the composite endpoint of death or disabling stroke while PARTNER 3 trial proved TAVR to be superior to surgery with regard to the composite e...
Source: Current Cardiology Reports - Category: Cardiology Source Type: research
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