Publications by authors named "Andreas Schafer"

Background: Consensus regarding on-support evaluation and weaning concepts from Impella 5.5 support is scarce. The derived left ventricular end-diastolic pressure (dLVEDP), estimated by device algorithms, is a rarely reported tool for monitoring the weaning process.

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This clinical consensus statement of the European Association of Percutaneous Cardiovascular Interventions was developed in association with the European Society of Cardiology Working Group on Cardiovascular Surgery. It aims to define procedural and contemporary technical requirements that may improve the efficacy and safety of percutaneous coronary intervention (PCI), both in the acute phase and at long-term follow-up, in a high-risk cohort of patients on optimal medical therapy when clinical and anatomical high-risk criteria are present that entail unacceptable surgical risks, precluding the feasibility of coronary artery bypass grafting (CABG). This document pertains to patients with surgical contraindication according to the Heart Team, in whom medical therapy has failed (e.

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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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Self-assembly of α-D nucleosides to supramolecular hydrogels is described in detail. Hydrogel formation is studied on α-D 2'-deoxyguanosine (α-dG), and the fluorescent 8-azapurine α-D nucleosides 2-amino-8-aza-2'-deoxyadenosine (α-2-NH-zA) and 8-aza-2'-deoxyisoguanosine (α-ziG). These compounds were prepared from α-D 8-aza-2'-deoxyguanosine by an activation/amination protocol followed by deamination.

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  • This study examines how age influences the effectiveness of microaxial flow pump (mAFP) treatment for patients suffering from ST-elevation myocardial infarction (STEMI) and cardiogenic shock (CS), using data from the DanGer Shock trial involving 355 participants.
  • Findings reveal that mortality rates significantly increase with age, from 31% in the youngest group to 73% in the oldest, showing younger patients (<77 years) benefit more from mAFP treatment (lower mortality), while older patients (≥77 years) do not have the same advantage.
  • The study also notes that complications were more common in the mAFP group, but overall, age significantly impacted survival outcomes, highlighting
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Surface modification through the formation of a self-assembled monolayer (SAM) can effectively engineer the physicochemical properties of the surface/material. However, the precise design of multifunctional SAMs at the molecular level is still a major challenge. Here, we jointly use N-heterocyclic carbenes (NHCs) and thiols to form multifunctional hetero-SAM systems that demonstrate excellent chemical stability, electrical conductivity, and, in silico, catalytic activity.

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Thermoresponsive polymer coatings on cell culture substrates enable noninvasive cell detachment and cell sheet fabrication for biomedical applications. Optimized coatings should support controlled culture and detachment of various cell types and allow chemical modifications, e.g.

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Background: In DanGer Shock (the Danish-German Cardiogenic Shock trial), use of a microaxial flow pump (mAFP) in patients with ST-segment-elevation myocardial infarction-related cardiogenic shock led to lower all-cause mortality but higher rates of renal replacement therapy (RRT). In this prespecified analysis, rates and predictors of acute kidney injury (AKI) and RRT were assessed.

Methods: In this international, randomized, open-label, multicenter trial, 355 adult patients with ST-segment-elevation myocardial infarction-related cardiogenic shock were randomized to mAFP (n=179) or standard care alone (n=176).

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Importance: Mechanical circulatory support with a microaxial flow pump (MAFP) has been shown to improve survival in ST-elevation myocardial infarction-induced cardiogenic shock (STEMI-CS). Understanding the impact on hemodynamic stability over time is crucial for optimizing patient treatment.

Objective: To determine if an MAFP reduces the need for pharmacological circulatory support without compromising hemodynamics compared with standard care in STEMI-CS.

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Background: Supraglottic airway devices such as the laryngeal tube (LT) are recommended in current guidelines for simplified airway management in patients during and immediately after out-of-hospital cardiac arrest (OHCA). Trials evaluating LTs included predominantly OHCA patients with non-shockable rhythms and low survival rates. Hence, LTs are widely used, but their impact on preventing hypoxic brain damage during resuscitation has not been evaluated yet.

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Advances in omics technologies have allowed spatially resolved molecular profiling of single cells, providing a window not only into the diversity and distribution of cell types within a tissue, but also into the effects of interactions between cells in shaping the transcriptional landscape. Cells send chemical and mechanical signals which are received by other cells, where they can subsequently initiate context-specific gene regulatory responses. These interactions and their responses shape the individual molecular phenotype of a cell in a given microenvironment.

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Cardiogenic shock due to ST-elevation myocardial infarction remains a critical condition with a high mortality rate, even with current revascularization techniques. The use of mechanical circulatory support, such as the microaxial flow pump device (Impella CP®), presents a promising approach to enhance cardiac output and systemic perfusion. The DanGer Shock trial explored the efficacy of Impella CP® in addition to standard care compared to standard care alone in improving survival outcomes for these patients.

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  • Transcatheter mitral valve replacement (TMVR) is a new treatment for mitral regurgitation that was studied for its effects on heart function using noninvasive pressure-volume loops.
  • A study of 26 patients showed improvements in left ventricular (LV) function after TMVR, indicated by a decrease in pressure-volume measures at discharge, but right ventricular (RV) function remained largely unchanged.
  • Long-term outcomes suggested that improvements in LV function post-TMVR were linked to lower 1-year rates of all-cause mortality and heart failure hospitalizations.
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Motivation: The inference of cellular compositions from bulk and spatial transcriptomics data increasingly complements data analyses. Multiple computational approaches were suggested and recently, machine learning techniques were developed to systematically improve estimates. Such approaches allow to infer additional, less abundant cell types.

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Purpose: Abscopal effects have been reported predominantly in metastatic cancers, indicating a radiographic response in a lesion that has not been included in the radiotherapy target volume. The response is interpreted as a humoral immune response to radiotherapy-generated tumour-specific antigens. In this case study, we present the first histologically confirmed multifocal low-grade meningioma with spontaneous regression of all other lesions after conventionally fractionated stereotactic radiotherapy (RT).

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Dual antiplatelet therapy (DAPT) is the cornerstone of maintenance medication following acute coronary syndromes (ST elevation myocardial infarction, non-ST elevation myocardial infarction, unstable angina). Over the last decade, P2Y12 inhibition in addition to low-dose acetylsalicylic acid has been intensively debated. In patients with acute coronary syndromes, balancing the reduction in cardiovascular events and increase in major bleeding during treatment with more potent P2Y12 inhibitors such as prasugrel and ticagrelor is still an issue.

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  • Transfemoral transcatheter aortic valve implantation (TAVI) is now the primary treatment for severe aortic stenosis, and intravascular lithotripsy (IVL-TAVI) can improve access for patients with severe iliofemoral calcifications.
  • A study comparing IVL-TAVI (30 patients) to traditional transaxillary access (TAX-TAVI, 44 patients) showed that IVL-TAVI had higher technical success (93.3% vs 81.8%) and lower safety complications (10.0% vs 31.8%).
  • The findings suggest that IVL-TAVI is a safe and effective method for patients previously deemed ineligible for transfemoral access
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Background And Aims: Candidate selection for lung transplantation (LuTx) is pivotal to ensure individual patient benefit as well as optimal donor organ allocation. The impact of coronary artery disease (CAD) on post-transplant outcomes remains controversial. We provide comprehensive data on the relevance of CAD for short- and long-term outcomes following LuTx and identify risk factors for mortality.

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  • A study examined the impact of using a microaxial flow pump alongside standard care for patients with STEMI and cardiogenic shock, focusing on mortality and safety outcomes.
  • In a trial with 360 patients, those using the pump had a lower death rate (45.8%) compared to those receiving only standard care (58.5%).
  • However, the pump group experienced a higher rate of adverse events (24.0% vs. 6.2%) and significantly more patients required renal-replacement therapy (41.9% vs. 26.7%).
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Critical care cardiology (CCC) in the modern era is shaped by a multitude of innovative treatment options and an increasingly complex, ageing patient population. Generating high-quality evidence for novel interventions and devices in an intensive care setting is exceptionally challenging. As a result, formulating the best possible therapeutic approach continues to rely predominantly on expert opinion and local standard operating procedures.

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  • VA-ECMO is a type of machine that helps people whose hearts can't pump blood properly, but researchers aren't sure if it's really helpful or safe yet.
  • Some studies show it might help after heart emergencies but others don't agree, especially for certain heart problems.
  • More research is being done to find out who might benefit the most from VA-ECMO and how to use it better.
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  • - The advancements in treating abdominal aortic aneurysms over the last 15 years have led to the need for a reassessment of the quality assurance guidelines for nursing personnel training in intensive care in Germany, which currently mandates a 50% specialist training quota that lacks empirical backing.
  • - A diverse group of 37 experts participated in a modified Delphi process involving literature searches, surveys, and discussions to assess and redefine training quotas for nursing staff, ultimately reaching a consensus.
  • - The expert panel recommended lowering the required specialist training quota to 30% and emphasized the need for structured programs to maintain and elevate nursing staff qualifications in intensive care units managing abdominal aortic aneurysms.
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Background And Objectives: Postoperative delirium is a frequent and severe complication after cardiac surgery. Activity of butyrylcholinesterase (BChE) has been discussed controversially regarding a possible role in its development. This study aimed to investigate the relevance of BChE activity as a biomarker for postoperative delirium after cardiac surgery or percutaneous valve replacement.

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Despite the substantial success of N-heterocyclic carbenes (NHCs) as stable and versatile surface modification ligands, their use in nanoscale applications beyond chemistry is still hampered by the failure to control the carbene binding mode, which complicates the fabrication of monolayers with the desired physicochemical properties. Here, we applied vibrational sum-frequency generation spectroscopy to conduct a pseudokinetic surface analysis of NHC monolayers on Au thin films under ambient conditions. We observe for two frequently used carbene structures that their binding mode is highly dynamic and changes with the adsorption time.

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Polyoxometalates (POM) are anionic oxoclusters of early transition metals that are of great interest for a variety of applications, including the development of sensors and catalysts. A crucial step in the use of POM in functional materials is the production of composites that can be further processed into complex materials, e.g.

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