Publications by authors named "Daniel Braun"

Background: Transradial secondary access (TR-SA) may serve as an alternative to the traditional femoral secondary access (TF-SA) for pigtail placement in transcatheter aortic valve replacement (TAVR).

Objectives: The aim of this study was to assess the incidence of secondary access-related vascular complications after TR-SA or TF-SA in TAVR.

Methods: The PULSE (Plug or sUture based vascuLar cloSurE after TAVR) registry retrospectively evaluated data of 10,120 patients who underwent transfemoral TAVR at 10 heart centers from 2016 to 2021.

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Background: Percutaneous coronary intervention (PCI) might improve outcome at severe stages of cardiac allograft vasculopathy (CAV) among patients after heart transplantation (HTx). Yet, risk stratification of HTx patients after PCI remains challenging.

Aims: To assess whether the International Society for Heart and Lung Transplantation (ISHLT) CAV classification remains prognostic after PCI and whether risk-stratification models of non-transplanted patients extend to HTx patients with CAV.

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Article Synopsis
  • Complex information processing systems, like the human brain, consist of specialized units that communicate locally rather than being controlled by a single global unit.
  • This study focuses on decision-makers that can specialize and communicate in cyclical patterns, enabling back-and-forth information exchange.
  • By adapting message-passing algorithms for local information flow, the research demonstrates that repeated communication among units can enhance performance, while an imbalance in connections and feedback can lead to suboptimal outcomes.
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Background: Transcatheter tricuspid valve intervention (TTVI) has been increasingly adopted in recent years for the treatment of patients with tricuspid regurgitation (TR). However, no dedicated risk stratification has been established for patients undergoing TTVI.

Objectives: The aim of the present study was to propose a dedicated risk score for patients affected by severe TR undergoing TTVI.

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Visual validation of regression models in scatterplots is a common practice for assessing model quality, yet its efficacy remains unquantified. We conducted two empirical experiments to investigate individuals' ability to visually validate linear regression models (linear trends) and to examine the impact of common visualization designs on validation quality. The first experiment showed that the level of accuracy for visual estimation of slope (i.

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Article Synopsis
  • Doctors are studying how a procedure called transcatheter tricuspid valve interventions (TTVI) affects patients with heart issues, specifically focusing on something called mitral regurgitation (MR) after the procedure.
  • They looked at data from a big group of patients and found that many showed improvement in MR after the procedure, but some got worse.
  • They discovered that certain factors, like successful procedures and specific treatments, could help predict whether a patient’s MR would improve or get worse after TTVI.
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Background: Right ventricular (RV) dysfunction in patients undergoing transcatheter aortic valve implantation (TAVI) for aortic stenosis (AS) has long been disregarded. We aimed to assess the predictive value of RV to pulmonary artery coupling (RV/PAc), defined as tricuspid annular plane systolic excursion to systolic pulmonary artery pressure, on mortality in different flow types of AS after TAVI.

Methods: All patients undergoing TAVI for AS at our centre between 2018 and 2020 were assessed; 862 patients were analysed.

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Article Synopsis
  • The study examines the effectiveness of the TRI-SCORE in predicting outcomes for patients undergoing transcatheter tricuspid valve intervention (TTVI), using data from a large, international registry called TriValve.
  • Among the 634 patients analyzed, those with a TRI-SCORE of 8 or higher were found to have a significantly increased risk of all-cause mortality and complications within 30 days of the procedure, compared to those with lower TRI-SCOREs.
  • Despite indicating a higher risk for severe outcomes, the TRI-SCORE overall showed limited effectiveness in predicting clinical results following TTVI, as improvements in patient functional class were observed across all TRI-SCORE levels.
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Aims: T-TEER is an effective therapy for the treatment of tricuspid regurgitation (TR). However, the effects of leaflets clipping on tricuspid valve annulus (TA) have not been investigated in detail. The aim of this study is to investigate the effects of tricuspid transcatheter edge-to-edge repair (T-TEER) on TA diameter.

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Background: Knowledge about atrial functional tricuspid regurgitation (afTR) in transcatheter aortic valve replacement (TAVR) patients is scarce.

Objectives: The aim of the study was to analyze the association between the entity and the development of tricuspid regurgitation (TR) in patients undergoing TAVR for aortic stenosis and concomitant TR.

Methods: We analyzed patients undergoing TAVR for severe aortic stenosis from January 2013 to December 2020 and concomitant at least moderate TR at baseline.

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Background: Patients undergoing transcatheter aortic valve implantation (TAVI) frequently have coronary artery disease requiring percutaneous coronary intervention (PCI). Usually, PCI and TAVI are performed in two separate procedures and current studies are investigating potential benefits regarding the order. However, the two interventions may also be performed simultaneously, thereby limiting the risk associated with repeated vascular access.

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The availability of high-resolution 3D structural information is crucial for investigating guest-host systems across a wide range of fields. In the context of drug discovery, the information is routinely used to establish and validate structure-activity relationships, grow initial hits from screening campaigns, and to guide molecular docking. For the generation of protein-ligand complex structural information, X-ray crystallography is the experimental method of choice, however, with limited information on protein flexibility.

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Article Synopsis
  • The study aimed to compare the characteristics and outcomes of patients with atrial STR (ASTR) and ventricular STR (VSTR) who underwent transcatheter edge-to-edge repair (T-TEER) for tricuspid regurgitation (TR).
  • Patients were categorized into ASTR or VSTR based on specific cardiac criteria, and a total of 298 were included in the analysis, with similar procedural success rates for both groups.
  • Results showed that while T-TEER effectively reduced TR in both ASTR and VSTR patients, survival rates at 12 months were significantly higher for ASTR (91%) compared to VSTR (72%).
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We introduce two novel visualization designs to support practitioners in performing identification and discrimination tasks on large value ranges (i.e., several orders of magnitude) in time-series data: (1) The order of magnitude horizon graph, which extends the classic horizon graph; and (2) the order of magnitude line chart, which adapts the log-line chart.

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The recruitment of cross-hemispheric counterparts of lateralized prefrontal brain regions with increasing processing demand is thought to increase memory performance despite cognitive aging, but was recently reported to be present also in young adults working at their capacity limit. Here we ask if cross-hemispheric recruitment is a general strategy of the adult brain in that executive task demand would modulate bilateral activation beyond prefrontal cortex and across cognitive tasks. We analyzed data sets from two fMRI experiments investigating retrospective working memory maintenance and prospective action planning.

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Background: Patients with severe aortic regurgitation (AR) are often not considered for surgery because of increased surgical risk. Because of unique anatomical characteristics among patients with AR, interventional treatment options are limited, and implantation results are inconsistent compared with those among patients with aortic stenosis.

Objectives: The authors describe the initial commercial experience of the first Conformité Européenne-marked transfemoral transcatheter aortic valve replacement system (JenaValve Trilogy [JV]) for the treatment of patients with AR.

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Background: Cardiohepatic syndrome (CHS) has been identified as an important but underrecognized survival predictor in multiple cardiovascular disease entities. The objectives of this study were to evaluate the prevalence and prognostic value of CHS in patients undergoing TAVR for severe aortic stenosis (AS).

Methods: The study included patients with available laboratory parameters of hepatic function who underwent TAVR from July 2013 until December 2019 at our center.

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Background: Concomitant moderate/severe mitral regurgitation (MR) is observed in 17-35% of patients undergoing transcatheter aortic valve implantation (TAVI) and contributes to a worse prognosis. Studies analysing outcomes in patients undergoing TAVI with different MR aetiologies, including atrial functional MR (aFMR), are lacking.

Aims: We aimed to analyse outcomes and changes in MR severity in patients with aFMR, ventricular functional (vFMR) and primary mitral regurgitation (PMR) following TAVI.

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Aims: The impact of the cardio-hepatic syndrome (CHS) on outcomes in patients undergoing mitral valve transcatheter edge-to-edge repair (M-TEER) for relevant mitral regurgitation (MR) is unknown. The objectives of this study were three-fold: (i) to characterize the pattern of hepatic impairment, (ii) to investigate the prognostic value of CHS, and (iii) to evaluate the changes in hepatic function after M-TEER.

Methods And Results: Hepatic impairment was quantified by laboratory parameters of liver function.

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Article Synopsis
  • This study examines the relationship between tricuspid valve gradient (TVG) and clinical outcomes in patients who underwent tricuspid transcatheter edge-to-edge repair (TEER) for significant tricuspid regurgitation.
  • Researchers analyzed data from 308 patients and categorized them into quartiles based on their mean TVG at discharge.
  • The results showed no significant differences in mortality or heart failure hospitalizations across the TVG quartiles one year post-procedure, indicating that higher discharge TVG was not linked to worse outcomes.
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Background: The optimal access route in patients with severe peripheral artery disease (PAD) undergoing transcatheter aortic valve replacement (TAVR) remains undetermined.

Objectives: This study sought to compare clinical outcomes with transfemoral access (TFA), transthoracic access (TTA), and nonthoracic transalternative access (TAA) in TAVR patients with severe PAD.

Methods: Patients with PAD and hostile femoral access (TFA impossible, or possible only after percutaneous treatment) undergoing TAVR at 28 international centers were included in this registry.

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Objectives: Severe mitral regurgitation (MR) and tricuspid regurgitation (TR) aggravate haemodynamic stress leading to congestive heart failure with impaired hepatic function, also known as cardiohepatic syndrome (CHS). Current perioperative risk calculators do not sufficiently consider CHS and serum liver function parameters lack sensitivity to diagnose CHS. Indocyanine green and its elimination (measured by the LIMON® test) represent a dynamic and non-invasive test which correlates with the hepatic function.

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Background: Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is a valuable treatment option for patients in cardiogenic shock, but complications during decannulation may worsen the overall outcome. Therefore, the aim of this study was to compare the efficacy and safety of suture-based to pure plug-based vascular closure devices for VA-ECMO decannulation.

Methods: In this retrospective study, the procedural outcome of 33 patients with suture-based closure devices was compared to 38 patients with MANTA plug-based closure devices.

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Background: Transcatheter aortic valve replacement (TAVR) is a well-established, safe and effective therapy for severe symptomatic aortic stenosis (AS). The aim of this study was to objectively quantify improvement of physical activity after TAVR, with consideration of different low-gradient AS subtypes.

Methods And Results: All patients undergoing TAVR for severe AS were screened.

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