1,720,964 research outputs found
Results From a Multicenter Real-World Experience
No full textBackground: Treatment options for secondary tricuspid regurgitation (TR) remain limited. Early real-world data of a new percutaneous direct annuloplasty system for tricuspid repair were examined. Methods: The first 60 patients treated with the Cardioband tricuspid valve repair system at 4 centers were included in this retrospective study. The primary efficacy end point was technical success with reduction of TR ≥2 grades at discharge. Combined primary safety end point was major adverse events (death, myocardial infarction, cardiothoracic surgery, and stroke) at 30 days. Results: Median patient age was 76 years (73–82), median EuroScore II was 3.9% (2.2–8.1), heart failure with preserved ejection fraction was present in 78%, and 81.7% were in the New York Heart Association class III/IV. Massive or torrential TR was found in 51.7%, and severe TR in 48.3%. The primary efficacy end point was achieved in 45%, while 60.3% of patients had less-than-severe TR at discharge. Vena contracta was reduced by 47% from 12.9±4.8 to 7.0±3.4 mm ( P <0.001). Overall, the majority of patients (81.7%) improved at least by 1 New York Heart Association class. At follow-up 81.3% of patients presented in the New York Heart Association class I or II. The primary safety end point occurred in 4 patients with 2 in-hospital deaths, both not device related. Right coronary artery complications (vessel perforation or stent implantation) occurred in 9 patients (15%). Procedural time decreased from 298 to 185 minutes ( P <0.001) with efficacy remaining stable ( P =0.817) when comparing procedure numbers 11 or more to the earliest 5 procedures per center. Conclusions: This first real-world experience suggests that transcatheter treatment of advanced secondary TR using direct annuloplasty is feasible and reasonably safe early in the learning curve, with significant symptomatic benefit. Further studies are warranted to provide data on long-term outcome and patient prognosis.Background: Treatment options for secondary tricuspid regurgitation (TR) remain limited. Early real-world data of a new percutaneous direct annuloplasty system for tricuspid repair were examined. Methods: The first 60 patients treated with the Cardioband tricuspid valve repair system at 4 centers were included in this retrospective study. The primary efficacy end point was technical success with reduction of TR ≥2 grades at discharge. Combined primary safety end point was major adverse events (death, myocardial infarction, cardiothoracic surgery, and stroke) at 30 days. Results: Median patient age was 76 years (73–82), median EuroScore II was 3.9% (2.2–8.1), heart failure with preserved ejection fraction was present in 78%, and 81.7% were in the New York Heart Association class III/IV. Massive or torrential TR was found in 51.7%, and severe TR in 48.3%. The primary efficacy end point was achieved in 45%, while 60.3% of patients had less-than-severe TR at discharge. Vena contracta was reduced by 47% from 12.9±4.8 to 7.0±3.4 mm ( P <0.001). Overall, the majority of patients (81.7%) improved at least by 1 New York Heart Association class. At follow-up 81.3% of patients presented in the New York Heart Association class I or II. The primary safety end point occurred in 4 patients with 2 in-hospital deaths, both not device related. Right coronary artery complications (vessel perforation or stent implantation) occurred in 9 patients (15%). Procedural time decreased from 298 to 185 minutes ( P <0.001) with efficacy remaining stable ( P =0.817) when comparing procedure numbers 11 or more to the earliest 5 procedures per center. Conclusions: This first real-world experience suggests that transcatheter treatment of advanced secondary TR using direct annuloplasty is feasible and reasonably safe early in the learning curve, with significant symptomatic benefit. Further studies are warranted to provide data on long-term outcome and patient prognosis
Abstract 15583: Cardiovascular Computed Tomography Aortic Valve Calcification, Myocardial Fibrosis and Adverse Outcome Following Transcatheter Aortic Valve Replacement
No full textImpact of epicardial adipose tissue on myocardial function and structure in patients with severe aortic valve stenosis
No full textAbstract Aims Epicardial adipose tissue (EAT) is closely associated with the development of heart failure and adverse myocardial remodelling. In patients with severe aortic valve stenosis (AS) undergoing transcatheter aortic valve replacement (TAVR), increased EAT has been identified as a predictor of adverse outcomes; however, the underlying pathophysiological mechanisms remain unclear. This study aims to explore the effects of increased EAT volumes on myocardial remodelling and dysfunction in patients with severe AS. Methods and results One hundred thirty‐seven patients with severe AS (median age 80 years, 62% male) underwent cardiac magnetic resonance imaging (CMR) prior to TAVR. Myocardial volumes and function as well as EAT volumes were quantified from CMR acquisitions. The cohort was dichotomised at the median EAT volume. Patients with increased EAT volumes above the median (≥46.5 mL/m 2 ) showed impaired left atrial (LA) reservoir strain (Es) as a distinct functional feature compared with patients with lower EAT volumes (11.8% [7.6–16.7] vs. 15.0% [10.9–19.1], P = 0.011), while left ventricular (LV) morphology and function (all P ≥ 0.216), right atrial and ventricular morphology and function (all P ≥ 0.090), as well as tissue characteristics (all ≥ 0.229) were similar between both groups. In a subgroup analysis of the four types of severe AS, the difference was most prominent in patients with low ejection fraction high‐gradient AS. In multivariable regression analyses, EAT was independently associated with impaired LA Es, irrespective of co‐morbidities, ventricular function, tissue characteristics and functional characteristics of AS. Conclusions In patients with severe AS, increased EAT volume is independently associated with impaired LA function but not with other features of biventricular morphology, function or tissue composition. The incremental deterioration of LA function, in addition to the afterload imposed by AS in these patients, could increase vulnerability to heart failure and may require consideration as a therapeutic target beyond TAVR
Cellular and extracellular proteomic profiling of paradoxical low-flow low-gradient aortic stenosis myocardium
No full textAims Patients with severe aortic stenosis (AS), low transvalvular flow (LF) and low gradient (LG) with normal ejection fraction (EF)—are referred to as paradoxical LF-LG AS (PLF-LG). PLF-LG patients develop more advanced heart failure symptoms and have a worse prognosis than patients with normal EF and high-gradient AS (NEF-HG). Despite its clinical relevance, the mechanisms underlying PLF-LG are still poorly understood. Methods Left ventricular (LV) myocardial biopsies of PLF-LG ( n = 5) and NEF-HG patients ( n = 6), obtained during transcatheter aortic valve implantation, were analyzed by LC-MS/MS after sequential extraction of cellular and extracellular matrix (ECM) proteins using a three-step extraction method. Proteomic data are available via ProteomeXchange with identifier PXD055391. Results 73 cellular proteins were differentially abundant between the 2 groups. Among these, a network of proteins related to muscle contraction and arrhythmogenic cardiomyopathy (e.g., cTnI, FKBP1A and CACNA2D1) was found in PLF-LG. Extracellularly, upregulated proteins in PLF-LG were related to ATP synthesis and oxidative phosphorylation (e.g., ATP5PF, COX5B and UQCRB). Interestingly, we observed a 1.3-fold increase in cyclophilin A (CyPA), proinflammatory cytokine, in the extracellular extracts of PLF-LG AS patients ( p < 0.05). Consistently, immunohistochemical analysis confirmed its extracellular localization in PLF-LG AS LV sections along with an increase in its receptor, CD147, compared to the NEF-HG AS patients. Levels of core ECM proteins, namely collagens and proteoglycans, were comparable between groups. Conclusion Our study pinpointed novel candidates and processes with potential relevance in the pathophysiology of PLF-LG. The role of CyPA in particular warrants further investigation.Open-Access-Publikationsfonds 202
Direct proteomic and high-resolution microscopy biopsy analysis identifies distinct ventricular fates in severe aortic stenosis
No full textThe incidence of aortic valve stenosis (AS), the most common reason for aortic valve replacement (AVR), increases with population ageing. While untreated AS is associated with high mortality, different hemodynamic subtypes range from normal left-ventricular function to severe heart failure. However, the molecular nature underlying four different AS subclasses, suggesting vastly different myocardial fates, is unknown. Here, we used direct proteomic analysis of small left-ventricular biopsies to identify unique protein expression profiles and subtype-specific AS mechanisms. Left-ventricular endomyocardial biopsies were harvested from patients during transcatheter AVR, and inclusion criteria were based on echocardiographic diagnosis of severe AS and guideline-defined AS-subtype classification: 1) normal ejection fraction (EF)/high-gradient; 2) low EF/high-gradient; 3) low EF/low-gradient; and 4) paradoxical low-flow/low-gradient AS. Samples from non-failing donor hearts served as control. We analyzed 25 individual left-ventricular biopsies by data-independent acquisition mass spectrometry (DIA-MS), and 26 biopsies by histomorphology and cardiomyocytes by STimulated Emission Depletion (STED) superresolution microscopy. Notably, DIA-MS reliably detected 2273 proteins throughout each individual left-ventricular biopsy, of which 160 proteins showed significant abundance changes between AS-subtype and non-failing samples including the cardiac ryanodine receptor (RyR2). Hierarchical clustering segregated unique proteotypes that identified three hemodynamic AS-subtypes. Additionally, distinct proteotypes were linked with AS-subtype specific differences in cardiomyocyte hypertrophy. Furthermore, superresolution microscopy of immunolabeled biopsy sections showed subcellular RyR2-cluster fragmentation and disruption of the functionally important association with transverse tubules, which occurred specifically in patients with systolic dysfunction and may hence contribute to depressed left-ventricular function in AS
Epicardial adipose tissue as an independent predictor of long-term outcome in patients with severe aortic stenosis undergoing transcatheter aortic valve replacement
No full textAbstract
Background
Accurate risk stratification is important to improve patient selection and outcome of patients with severe aortic stenosis (AS) undergoing transcatheter aortic valve replacement (TAVR). As epicardial adipose tissue (EAT) is discussed to be involved in cardiovascular disease, it could be useful as a marker of poor prognosis in patients with severe AS undergoing TAVR.
Methods
A total of 416 patients diagnosed with severe AS by transthoracic echocardiography were assigned for TAVR and enrolled for systematic assessment. Patients underwent clinical surveys and 5-year long-term follow-up, with all-cause mortality as the primary endpoint. EAT volume was quantified on pre-TAVR planning CTs. Patients were retrospectively dichotomized at the median of 74 cm
3
of EAT into groups with low EAT and high EAT volumes. Mortality rates were compared using Kaplan-Meyer plots and uni- and multivariable cox regression analyses.
Results
A total number of 341 of 416 patients (median age 80.9 years, 45% female) were included in the final analysis. Patients with high EAT volumes had similar short-term outcome (
p
= 0.794) but significantly worse long-term prognosis (
p
= 0.023) compared to patients with low EAT volumes. Increased EAT volumes were associated with worse long-term outcome (HR1.59;
p
= 0.031) independently from concomitant cardiovascular risk factors, general type of AS, and functional echocardiography parameters of AS severity (HR1.69;
p
= 0.013).
Conclusion
Increased EAT volume is an independent predictor of all-cause mortality in patients with severe AS undergoing TAVR. It can be easily obtained from pre-TAVR planning CTs and may thus qualify as a novel marker to improve prognostication and management of patient with severe AS.
Trial registration
DRKS, DRKS00024479.
Graphical abstract
AS, aortic stenosis; TAVR, transcatheter aortic valve replacement; EAT, epicardial adipose tissueDeutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659Herzzentrum Göttinge
Cardiac fibrosis as a predictor for sudden cardiac death after transcatheter aortic valve implantation
No full textSingle-nucleus transcriptomics reveals adrenergic and STAT3 signaling in paradoxical low-flow low-gradient -specific cardiomyocyte subclusters: implications for aortic stenosis pathogenesis and treatment
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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