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Institute
- Medizinische Klinik und Poliklinik I (621) (remove)
Sonstige beteiligte Institutionen
- Zentraleinheit Klinische Massenspektrometrie (3)
- Johns Hopkins School of Medicine (2)
- Johns Hopkins School of Medicine, Baltimore, MD, U.S. (2)
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Die Aortenklappenstenose stellt eine der häufigsten Herzklappenerkrankungen der westlichen Welt mit steigender Inzidenz dar. Mithilfe der kathetergestützten Aortenklappenimplantation (TAVI) ist es heutzutage möglich, auch chirurgisch inoperable PatientInnen mit einer Klappenprothese zielgerichtet zu behandeln. Ziel dieser Arbeit war es, klinische und echokardiografische Prädiktoren der Gesamtmortalität sowie des Kurz- (30 Tage) und Langzeitüberlebens (12 Monate) nach TAVI zu ermitteln.
Es wurden zahlreiche klinische und echokardiografische Parameter bei 618 PatientInnen, die zwischen Juli 2009 und Oktober 2018 eine TAVI erhielten, untersucht. Anschließend erfolgte ein Follow-up mittels Telefoninterview oder hausärztlicher Auskunft. Es folgten statistische Analysen zur Ermittlung signifikanter Unterschiede zwischen verstorbenen und lebenden PatientInnen. Abschließend wurden mögliche Prädiktoren der Mortalität mithilfe multivariabler Cox Regressionmodelle identifiziert.
In den Analysen ergaben sich zahlreiche signifikante Unterschiede zwischen Lebenden und Verstorbenen. Klinische Prädiktoren, die ein höheres Risiko der Gesamt- sowie Langzeitmortalität anzeigen, sind der Zugangsweg (transapikal), pAVK, Vorhofflimmern, erhöhte CRP-Level sowie eine Amiodaroneinnahme. Letztere erwies sich als der einzige Prädiktor der Kurzzeitmortalität. Als echokardiografische Prädiktoren (nach Adjustierung bezüglich klinischer Parameter) der Gesamtmortalität präsentieren sich eine erniedrigte TAPSE (≤14mm), erniedrigte septale MAPSE (≤6mm) sowie erhöhtes septales E/e‘ (≥28). Dieses ist auch ein Prädiktor des Lang- und Kurzzeitüberlebens. Zusätzlich zeigt ein sPAP-Anstieg pro 5mmHg eine erhöhte Kurzzeitsterblichkeit an.
Für die Mortalität nach einem TAVI-Eingriff sind neben kardiovaskulären Komorbiditäten auch echokardiografisch messbare kardiale Faktoren entscheidend, insbesondere eine systolische Dysfunktion (erniedrigte TAPSE und MAPSE), diastolische Dysfunktion (erhöhter Füllungsdruckindex E/e‘) sowie erhöhte pulmonalarterielle Drücke (sPAP). Wenn PatientInnen schon vor dem Eingriff diese pathologischen Werte zeigen, sind sie als einem „Hochrisikokollektiv“ zugehörig aufzufassen, was in der Aufklärung wie auch Vor- und in der Nachsorge solcher PatientInnen zukünftig Berücksichtigung finden sollte.
Der kathetergestützte Aortenklappenersatz nimmt auch bei Patienten mit niedrigem OP-Risiko einen zunehmend größeren Stellenwert zur Behandlung der hochgradigen Aortenklappenstenose ein.45 Umso wichtiger ist es, die einzelnen Schritte der Intervention zu optimieren. In einigen Arbeiten wurde bereits die Vordilatation als obsolet bezeichnet, da sie lediglich die OP-Zeit verlängere und Komplikationen wie Schlaganfälle und AV-Blockierungen begünstige.22,52,53,57,59 Ziel dieser Studie war es, die Vor- und Nachteile der Vordilatation zu untersuchen. Hierzu wurden 625 Patienten, die im Zeitraum von 2016-2020 eine TAVI am UKW erhielten, retrospektiv analysiert (323 mit, 302 ohne Vordilatation). Es wurden demographische sowie prä-, peri- und post-interventionelle Daten analysiert. Statistisch signifikante Unterschiede wurden bei den Schlaganfällen beobachtet (p=0,01), die mit 2,2% lediglich bei Patienten mit Vordilatation auftraten, sodass bei einem hohen Schlaganfallrisiko hierauf verzichtet werden sollte. Zusätzlich war in der Gruppe mit Vordilatation die passagere Schrittmacherabhängigkeit signifikant häufiger (p=0,01). Alle anderen Komplikationen waren nicht signifikant. In beiden Gruppen zeigte sich zu >95% ein Device-Success, sodass der Verzicht auf eine Prädilatation nicht mit einem schlechteren Outcome assoziiert und somit sicher ist.53,57,58,59,61
Die Auswertung der TTE-Daten zeigte, dass eine Prädilatation durchgeführt wurde, wenn die Klappe signifikant höhergradig stenosiert war (Pmean 50,17 vs. 46,79mmHG). Ferner wurde bei leichtgradigen Aortenklappeninsuffizienzen signifikant häufiger auf eine Vordilatation verzichtet (p=0,04). Eine Vordilatation kann also bei komplexeren anatomischen Verhältnissen sinnvoll sein, um einen optimalen Klappensitz zu gewährleisten.52,53 Nach TAVI zeigte sich die LV-EF in der Gruppe mit Prädilatation signifikant höher (p=0,002). Höhergradige Aortenklappeninsuffizienzen scheinen nicht durch eine Vordilatation begünstigt zu sein, die AI°II wurde nur bei 4 Patienten ohne Vordilatation beobachtet. In den postinterventionellen EKG-Daten zeigten sich in der Gruppe ohne Vordilatation signifikant häufiger Linksschenkelblöcke sowie ein AVB °II, Typ II, was vermutlich durch die fehlende Vorbereitung der Klappe und den damit assoziierten ungünstigeren Prothesensitz zu erklären ist.53 Die Nachdilatation wurde nicht durch eine vorausgegangene Vordilatation beeinflusst. Bezüglich der implantierten Klappenarten wurde die S3 Ultra signifikant häufiger bei Patienten ohne Vordilatation eingesetzt. Die in vielen Arbeiten beschriebene kürzere OP-Dauer ließ sich in dieser Studie nicht bestätigen.52,53,56 Stattdessen war bei TAVIs ohne Vordilatation die Eingriffsdauer im Schnitt 4min länger (p=0,11). Es bestätigte sich, dass bei einer Prädilatation signifikant mehr Kontrastmittel verwendet wurde (p=0,001) und die Strahlenbelastung höher war. Dies ist insbesondere für Patienten mit einer Niereninsuffizienz von Bedeutung.42 Ob eine Vordilatation durchgeführt wird, sollte also individuell aufgrund der Begleiterkrankungen und Risikofaktoren entschieden werden.
A growing body of literature reports on the upregulation of C-X-C motif chemokine receptor 4 (CXCR4) in a variety of cancer entities, rendering this receptor as suitable target for molecular imaging and endoradiotherapy in a theranostic setting. For instance, the CXCR4-targeting positron emission tomography (PET) agent [\(^{68}\)Ga]PentixaFor has been proven useful for a comprehensive assessment of the current status quo of solid tumors, including adrenocortical carcinoma or small-cell lung cancer. In addition, [\(^{68}\)Ga]PentixaFor has also provided an excellent readout for hematological malignancies, such as multiple myeloma, marginal zone lymphoma, or mantle cell lymphoma. PET-based quantification of the CXCR4 capacities in vivo allows for selecting candidates that would be suitable for treatment using the theranostic equivalent [\(^{177}\)Lu]/[\(^{90}\)Y]PentixaTher. This CXCR4-directed theranostic concept has been used as a conditioning regimen prior to hematopoietic stem cell transplantation and to achieve sufficient anti-lymphoma/-tumor activity in particular for malignant tissues that are highly sensitive to radiation, such as the hematological system. Increasing the safety margin, pretherapeutic dosimetry is routinely performed to determine the optimal activity to enhance therapeutic efficacy and to reduce off-target adverse events. The present review will provide an overview of current applications for CXCR4-directed molecular imaging and will introduce the CXCR4-targeted theranostic concept for advanced hematological malignancies.
Background: Large Cell Neuroendocrine Carcinoma (LCNEC) is a rare subtype of lung cancer with poor clinical outcomes. Data on recurrence-free survival (RFS) in early and locally advanced pure LCNEC after complete resection (R0) are lacking. This study aims to evaluate clinical outcomes in this subgroup of patients and to identify potential prognostic markers. Methods: Retrospective multicenter study including patients with pure LCNEC stage I-III and R0 resection. Clinicopathological characteristics, RFS, and disease-specific survival (DSS) were evaluated. Univariate and multivariate analyses were performed. Results: 39 patients (M:F = 26:13), with a median age of 64 years (44–83), were included. Lobectomy (69.2%), bilobectomy (5.1%), pneumonectomy (18%), and wedge resection (7.7%) were performed mostly associated with lymphadenectomy. Adjuvant therapy included platinum-based chemotherapy and/or radiotherapy in 58.9% of cases. After a median follow-up of 44 (4–169) months, the median RFS was 39 months with 1-, 2- and 5-year RFS rates of 60.0%, 54.6%, and 44.9%, respectively. Median DSS was 72 months with a 1-, 2- and 5-year rate of 86.8, 75.9, and 57.4%, respectively. At multivariate analysis, age (cut-off 65 years old) and pN status were independent prognostic factors for both RFS (HR = 4.19, 95%CI = 1.46–12.07, p = 0.008 and HR = 13.56, 95%CI 2.45–74.89, p = 0.003, respectively) and DSS (HR = 9.30, 95%CI 2.23–38.83, p = 0.002 and HR = 11.88, 95%CI 2.28–61.84, p = 0.003, respectively). Conclusion: After R0 resection of LCNEC, half of the patients recurred mostly within the first two years of follow-up. Age and lymph node metastasis could help to stratify patients for adjuvant therapy.
Das adrenokortikale Karzinom (ACC) ist eine seltene Tumorerkrankung der Nebennierenrinde. Die Prognose ist im Allgemeinen ungünstig und vom Tumorstadium sowie von weiteren tumor- und patientenspezifischen Faktoren abhängig. Die chirurgische Komplettresektion stellt das bisher einzige kurative Behandlungsverfahren dar.
Dabei gibt es bisher für sonstige Lokaltherapien beim fortgeschrittenen bzw. rezidivierten ACC kaum umfangreiche Daten, welche die entsprechende lokale Wirksamkeit belegen. Neben der Operation stellt die Strahlentherapie eine bisher effektive Therapieoption bei verschiedenen anderen Tumorerkrankungen hinsichtlich Tumorkontrolle, Verträglichkeit und Zugänglichkeit dar. Allerdings ist diese Option in der Behandlung des fortgeschrittenen ACC als Lokaltherapie bislang nicht mit zufriedenstellenden Datensätzen umfänglich untersucht.
Ziel dieser Studie war es, anhand einer retrospektiven Datenanalyse aus dem European Network for the Study of Adrenal Tumours (ENSAT) den Stellenwert der Strahlentherapie als Lokaltherapie beim fortgeschrittenen bzw. rezidivierten ACC zu untersuchen. Es wurden insgesamt 132 Fälle hinsichtlich strahlentherapeutischer Dosis, Lokalkontrolle, progressionsfreiem Überleben, Gesamtüberleben, objektivem Ansprechen, Verträglichkeit und Risikofaktoren untersucht.
Hierbei konnte gezeigt werden, dass die Anwendung einer hohen biologischen Effektivdosis mit einer verbesserten lokalen Tumorkontrolle einhergeht. Insgesamt zeigte sich eine gute Verträglichkeit der strahlentherapeutischen Behandlung. Die Ergebnisse dieser Arbeit legen nahe, dass wahrscheinlich weitere Risikofaktoren mit Rezidiven dieser Tumorart einhergehen, allerdings weitere Untersuchungen (z.B. randomisierte prospektive Studien) erfordern. Letztendlich stellt diese Arbeit auch die angewandten Dosis- und Fraktionierungskonzepte der vergangenen Jahrzente bei der Behandlung des ACC dar.
Neurofibromatosis type 1 (NF1) is a genetic multisystemic autosomal dominant disorder determining reduced life expectancy due to higher risk of developing benign and malignant tumors. Low levels of vitamin D and reduced bone mineral density (BMD) have been reported in young patients with NF1. However, correlation between vitamin D and NF1 phenotype needs to be elucidated. Aim of this study was to assess vitamin D levels and bone metabolism in NF1 patients, analyzing potential correlations with clinical phenotype. A cross-sectional study was carried out in a monocentric series of NF1 patients, evaluating genotype, clinical phenotype, BMD, biochemical evaluation with focus on serum 25OH-vitamin D, parathyroid hormone (PTH), calcium and phosphate levels. Correlations between clinical manifestations, neurofibromas, and vitamin D status have been studied in comparison with healthy controls. 31 NF1 adult patients were matched for sex, age and body mass index with 31 healthy controls. A significantly difference in vitamin D level emerged in NF1 patients compared to controls. Interestingly low vitamin D levels correlated with a more aggressive phenotype and with a bigger size of neurofibromas. These data underline that vitamin D deficiency/insufficiency may play a role in clinical severity of neurofibromas in patients with NF1, suggesting the need to check bone status and replace vitamin D in these patients.
Background
CXCR4-directed positron emission tomography/computed tomography (PET/CT) has been used as a diagnostic tool in patients with solid tumors. We aimed to determine a potential correlation between tumor burden and radiotracer accumulation in normal organs.
Methods
Ninety patients with histologically proven solid cancers underwent CXCR4-targeted [\(^{68}\)Ga]Ga-PentixaFor PET/CT. Volumes of interest (VOIs) were placed in normal organs (heart, liver, spleen, bone marrow, and kidneys) and tumor lesions. Mean standardized uptake values (SUV\(_{mean}\)) for normal organs were determined. For CXCR4-positive tumor burden, maximum SUV (SUV\(_{max}\)), tumor volume (TV), and fractional tumor activity (FTA, defined as SUV\(_{mean}\) x TV), were calculated. We used a Spearman's rank correlation coefficient (ρ) to derive correlative indices between normal organ uptake and tumor burden.
Results
Median SUV\(_{mean}\) in unaffected organs was 5.2 for the spleen (range, 2.44 – 10.55), 3.27 for the kidneys (range, 1.52 – 17.4), followed by bone marrow (1.76, range, 0.84 – 3.98), heart (1.66, range, 0.88 – 2.89), and liver (1.28, range, 0.73 – 2.45). No significant correlation between SUV\(_{max}\) in tumor lesions (ρ ≤ 0.189, P ≥ 0.07), TV (ρ ≥ -0.204, P ≥ 0.06) or FTA (ρ ≥ -0.142, P ≥ 0.18) with the investigated organs was found.
Conclusions
In patients with solid tumors imaged with [\(^{68}\)Ga]Ga-PentixaFor PET/CT, no relevant tumor sink effect was noted. This observation may be of relevance for therapies with radioactive and non-radioactive CXCR4-directed drugs, as with increasing tumor burden, the dose to normal organs may remain unchanged.
Background
International guidelines emphasise the role of radiotherapy (RT) for the management of advanced adrenocortical carcinoma (ACC). However, the evidence for this recommendation is very low.
Methods
We retrospectively analysed all patients who received RT for advanced ACC in five European centres since 2000. Primary endpoint: time to progression of the treated lesion (tTTP). Secondary endpoints: best objective response, progression-free survival (PFS), overall survival (OS), adverse events, and the establishment of predictive factors by Cox analyses.
Results
In total, 132 tumoural lesions of 80 patients were treated with conventional RT (cRT) of 50–60 Gy (n = 20) or 20–49 Gy (n = 69), stereotactic body RT of 35–50 Gy (SBRT) (n = 36), or brachytherapy of 12–25 Gy (BT) (n = 7). Best objective lesional response was complete (n = 6), partial (n = 52), stable disease (n = 60), progressive disease (n = 14). Median tTTP was 7.6 months (1.0–148.6). In comparison to cRT\(_{20-49Gy}\), tTTP was significantly longer for cRT\(_{50-60Gy}\) (multivariate adjusted HR 0.10; 95% CI 0.03–0.33; p < 0.001) and SBRT (HR 0.31; 95% CI 0.12–0.80; p = 0.016), but not for BT (HR 0.66; 95% CI 0.22–1.99; p = 0.46). Toxicity was generally mild and moderate with three grade 3 events. No convincing predictive factors could be established.
Conclusions
This largest published study on RT in advanced ACC provides clear evidence that RT is effective in ACC.
FGF/FGFR signaling regulates embryogenesis, angiogenesis, tissue homeostasis and wound repair by modulating proliferation, differentiation, survival, migration and metabolism of target cells. Understandably, compelling evidence for deregulated FGF signaling in the development and progression of different types of tumors continue to emerge and FGFR inhibitors arise as potential targeted therapeutic agents, particularly in tumors harboring aberrant FGFR signaling. There is first evidence of a dual role of the FGF/FGFR system in both organogenesis and tumorigenesis, of which this review aims to provide an overview. FGF-1 and FGF-2 are expressed in the adrenal cortex and are the most powerful mitogens for adrenocortical cells. Physiologically, they are involved in development and maintenance of the adrenal gland and bind to a family of four tyrosine kinase receptors, among which FGFR1 and FGFR4 are the most strongly expressed in the adrenal cortex. The repeatedly proven overexpression of these two FGFRs also in adrenocortical cancer is thus likely a sign of their participation in proliferation and vascularization, though the exact downstream mechanisms are not yet elucidated. Thus, FGFRs potentially offer novel therapeutic targets also for adrenocortical carcinoma, a type of cancer resistant to conventional antimitotic agents.
Einleitung:
In dieser Arbeit wurde die Auswirkung der Fettgewebesurrogate Halsumfang (HU), Taillenumfang (TU) und Body Mass Index (BMI) auf die Prognose bei Patienten mit chronischer Niereninsuffizienz untersucht.
Methoden:
Datengrundlage dieser Arbeit war die German Chronic Kidney Disease (GCKD) Beobachtungsstudie. Eingeschlossen wurden Erwachsene mit GFR 30-60 ml/min/1,73m² oder GFR > 60 ml/min/1,73m² mit offensichtlicher Proteinurie. Ausschlusskriterien waren: nicht-kaukasische Ethnie, Organtransplantation, Malignome und Herzinsuffizienz NYHA IV. Untersuchte kombinierte Endpunkte (EP) waren: 1) 4P-MACE (Herzinfarkt, Schlaganfall, kardiovaskulärer Tod, pAVK-Ereignis) 2) Tod jeglicher Ursache 3) Nierenversagen (Dialyse, Transplantation). Es wurden Cox-Regressionen mit HU, TU, und BMI für jeden EP, adjustiert für Alter, Geschlecht, Nikotinkonsum, Diabetes mellitus, arterielle Hypertonie, LDL-Cholesterin, GFR, Urin-Albumin/Kreatinin Ratio (UACR) und CRP berechnet. Interaktionsterme des jeweiligen Surrogats mit dem Geschlecht wurden eingeschlossen.
Ergebnisse:
Von den 4537 analysierten Studienteilnehmern, waren 59% Männer mit einem Durchschnittsalter von 60 (±12) Jahren, einer mittleren GFR von 50 (±18) ml/min/1,73m² und einem UACR-Median von 49 (10–374) mg/g. Der mittlere HU war 42,7 (±3,6) cm bei Männern und 37,2 (±3,7) cm bei Frauen, der mittlere TU 107,6 (±13,6) cm bei Männern und 97,0 (±16,3) cm bei Frauen und der mittlere BMI 29,7 (±5,9) kg/m². Die mittlere Beobachtungszeit betrug 6,5 Jahre. Der TU war signifikant mit Tod assoziiert, mit einer HR von 1,014 pro cm (95% KI 1,005–1,024). HU war signifikant mit Tod bei Frauen assoziiert, Interaktionsterm HR 1,080 pro cm (95% KI 1,009–1,155). Der BMI hatte keinen signifikanten Einfluss auf untersuchte EP.
Schlussfolgerung:
Bei Patienten mit mittel- bis schwergradig eingeschränkter Nierenfunktion steigern ein erhöhter TU (bei beiden Geschlechtern), sowie bei Frauen ein erhöhter HU das Risiko für Tod jeglicher Ursache.
Adoptive immunotherapy using chimeric antigen receptor (CAR)-modified T cells is an effective treatment for hematological malignancies that are refractory to conventional chemotherapy. To address a wider variety of cancer entities, there is a need to identify and characterize additional target antigens for CAR-T cell therapy. The two members of the receptor tyrosine kinase-like orphan receptor family, ROR1 and ROR2, have been found to be overexpressed on cancer cells and to correlate with aggressive cancer phenotypes. Recently, ROR1-specific CAR-T cells have entered testing in phase I clinical trials, encouraging us to assess the suitability of ROR2 as a novel target for CAR-T cell therapy. To study the therapeutic potential of targeting ROR2 in solid and hematological malignancies, we selected two representative cancer entities with high unmet medical need: renal cell carcinoma and multiple myeloma.
Our data show that ROR2 is commonly expressed on primary samples and cell lines of clear cell renal cell carcinoma and multiple myeloma. To study the efficacy of ROR2-specific CAR T cell therapy, we designed two CAR constructs with 10-fold binding affinity differences for the same epitope of ROR2. We found both cell products to exhibit antigen-specific anti-tumor reactivity in vitro, including tumor cell lysis, secretion of the effector cytokines interleukin-2 (IL-2) and interferon-gamma (IFNγ), and T cell proliferation. In vivo studies revealed ROR2 specific CAR-T cells to confer durable responses, significant survival benefits and long-term persistence of CAR-expressing T cells. Overall, there was a trend towards more potent anti-tumor efficacy upon treatment with T cells that expressed the CAR with higher affinity for ROR2, both in vitro and in vivo.
We performed a preclinical safety and toxicology assessment comprising analyses of ROR2 expression in healthy human and murine tissues, cross-reactivity, and adoptive T cell transfer in immunodeficient mice. We found ROR2 expression to be conserved in mice, and low-level expression was detectable in the male and female reproductive system as well as parts of the gastrointestinal tract. CAR-T cells targeting human ROR2 were found to elicit similarly potent reactivity upon recognition of murine ROR2. In vivo analyses showed transient tissue-specific enrichment and activation of ROR2-specific CAR-T cells in organs with high blood circulation, such as lung, liver, or spleen, without evidence for clinical toxicity or tissue damage as determined by histological analyses.
Furthermore, we humanized the CAR binding domain of ROR2-specific CAR-T cells to mitigate the risk of adverse immune reactions and concomitant CAR-T cell rejection. Functional analyses confirmed that humanized CARs retained their specificity and functionality against ROR2-positive tumor cells in vitro.
In summary, we show that ROR2 is a prevalent target in RCC and MM, which can be addressed effectively with ROR2-specific CAR-T cells in preclinical models. Our preliminary toxicity studies suggest a favorable safety profile for ROR2-specific CAR-T cells. These findings support the potential to develop ROR2-specific CAR-T cells clinically to obtain cell products with broad utility.
Acute and chronic cardiac disorders predispose to alterations in cognitive performance, ranging from mild cognitive impairment to overt dementia. Although this association is well-established, the factors inducing and accelerating cognitive decline beyond ageing and the intricate causal pathways and multilateral interdependencies involved remain poorly understood. Dysregulated and persistent inflammatory processes have been implicated as potentially causal mediators of the adverse consequences on brain function in patients with cardiac disease. Recent advances in positron emission tomography disclosed an enhanced level of neuroinflammation of cortical and subcortical brain regions as an important correlate of altered cognition in these patients. In preclinical and clinical investigations, the thereby involved domains and cell types of the brain are gradually better characterized. Microglia, resident myeloid cells of the central nervous system, appear to be of particular importance, as they are extremely sensitive to even subtle pathological alterations affecting their complex interplay with neighboring astrocytes, oligodendrocytes, infiltrating myeloid cells, and lymphocytes. Here, we review the current evidence linking cognitive impairment and chronic neuroinflammation in patients with various selected cardiac disorders including the aspect of chronic neuroinflammation as a potentially druggable target.
Wie diese und auch weitere Studien gezeigt haben, ist die Prävalenz der PatientInnen mit einer LVEF zwischen 36-49% und einem begleitenden LSB nicht zu unterschätzen. Ziel der vorliegenden Arbeit war es zum einen, zu untersuchen, ob ein LSB einen signifikanten Einfluss auf die Mortalität und kardiovaskuläre Sterblichkeit bei sowohl HFmrEF- als auch HFrEF-PatientInnen hat und zum anderen, ob es einen Zusammenhang zwischen einem LSB und der Nierenfunktion gibt.
Methoden: Unsere retrospektive Studie untersuchte 2152 PatientInnen mit echokardiographisch bestätigter HI, die sich zwischen 2009 und 2017 in der Universitätsklinik Würzburg vorstellten. Das mittleres Alter betrug 69 Jahre (±13 Jahre) und 72,5% der HFmrEF-Gruppe und 75,7% der HFrEF-Gruppe waren männlich. Jeder Patient erhielt ein durchschnittliches Follow-Up-von 25 Monaten (13-39 Monate). Zunächst wurden beide Gruppen direkt bezüglich des Vorhandenseins eines LSB miteinander verglichen. Die mit in die Studie aufgenommenen PatientInnen wurden anschließend in zwei größere Gruppen eingeteilt. Dabei konnten 1011 PatientInnen der HFmrEF-Gruppe zugeteilt werden, 125 PatientInnen mit und 886 ohne LSB. In der HFrEF-Gruppe befanden sich 1141 PatientInnen, 281 mit und 860 ohne LSB. Die HFrEF-Gruppe wurde zudem erneut hinsichtlich der Nierenfunktion aufgeteilt. Von den 1141 HFrEF-PatientInnen wurden 648 in die Gruppe mit erhaltener Nierenfunktion aufgeteilt und 493 HFrEF-PatientInnen in die Gruppe mit eingeschränkter Nierenfunktion.
Ergebnisse: In der HFmrEF-Subgruppe zeigten sich keine relevanten Auswirkungen durch das Vorhandensein oder Fehlen eines LSB auf die Gesamtmortalität und die kardiovaskuläre Mortalität. Auch in der HFrEF-Gruppe hatte das Vorhandensein eines LSB keine signifikante Relevanz für die Gesamtmortalität (34,5% vs. 31,6%, p=0,165). Das Risiko an einem kardiovaskulären Ereignis zu versterben war allerdings für HFrEF-PatientInnen mit LSB deutlich höher als für PatientInnen ohne LSB (86,3% vs. 82,2%, p=0,041). Nach Adjustierung von Alter, Geschlecht, BMI, KHK sowie Schlaganfall war der Einfluss eines LSB nicht mehr signifikant. Es zeigte sich jedoch, dass HFrEF-PatientInnen mit LSB und normaler Nierenfunktion eine mehr als zweifach erhöhte kardiovaskuläre Sterblichkeit haben (8,2% vs. 16,2%, p=0,002). Nach dieser Feststellung wurde gesondert auf weitere Komorbiditäten als mögliche Einflussfaktoren eingegangen. Unabhängig von dem Vorhandensein eines LSB hatten PatientInnen mit eingeschränkter Nierenfunktion eine deutlich erhöhte Mortalität verglichen mit PatientInnen ohne Nierendysfunktion. Hingegen beeinflusste ein LSB bei HFrEF-PatientInnen mit erhaltener Nierenfunktion das Überleben deutlich. LSB-PatientInnen mit erhaltener Nierenfunktion verstarben häufiger an einem kardiovaskulären Ereignis als HFrEF-PatientInnen mit normaler Nierenfunktion ohne LSB (86,3% vs. 82,2%, p=0,041). Um diese Untersuchung weiter zu vertiefen, wurde die HFrEF-Gruppe anhand der EF erneut in drei Subgruppen eingeteilt. Hierbei konnte eindeutig festgestellt werden, dass PatientInnen mit LSB, erhaltener Nierenfunktion und einer BLEF ≤ 30% vor Adjustierung von Alter, Geschlecht, BMI, Schlaganfall und KHK signifikant häufiger kardiovaskulär verstarben als PatientInnen ohne LSB. Des Weiteren fiel besonders die Subgruppe mit einer BLEF zwischen 36 und 39% auf. Denn vor Adjustierung der kardiovaskulären Mortalität zeigte sich ein signifikant erhöhte Mortalitätsrate für PatientInnen mit LSB. Nach Adjustierung der Einflussfaktoren war der prozentuale Anteil immer noch erhöht, lediglich nicht mehr signifikant. Somit gibt diese Studie den Anreiz, weitere prospektive Studien mit einem größeren Stichprobenumfang durchzuführen, um diese Annahme zu bestätigen. Zudem sollte in weiteren Studien untersucht werden, ob speziell für HFrEF-PatientInnen mit LSB und einer EF zwischen 36 und 39% eine CRT einen positiven therapeutischen Effekt bringen könnte.
We assume that a specific health constraint, e.g., a certain aspect of bodily function or quality of life that is measured by a variable X, is absent (or irrelevant) in a healthy reference population (Ref0), and it is materially present and precisely measured in a diseased reference population (Ref1). We further assume that some amount of this constraint of interest is suspected to be present in a population under study (SP). In order to quantify this issue, we propose the introduction of an intuitive measure, the population comparison index (PCI), that relates the mean value of X in population SP to the mean values of X in populations Ref0 and Ref1. This measure is defined as PCI[X] = (mean[X|SP] − mean[X|Ref0])/(mean[X|Ref1] − mean[X|Ref0]) × 100[%], where mean[X|.] is the average value of X in the respective group of individuals. For interpretation, PCI[X] ≈ 0 indicates that the values of X in the population SP are similar to those in population Ref0, and hence, the impairment measured by X is not materially present in the individuals in population SP. On the other hand, PCI[X] ≈ 100 means that the individuals in SP exhibit values of X comparable to those occurring in Ref1, i.e., the constraint of interest is equally present in populations SP and Ref1. A value of 0 < PCI[X] < 100 indicates that a certain percentage of the constraint is present in SP, and it is more than in Ref0 but less than in Ref1. A value of PCI[X] > 100 means that population SP is even more affected by the constraint than population Ref1.
Usability of a mHealth solution using speech recognition for point-of-care diagnostic management
(2023)
The administrative burden for physicians in the hospital can affect the quality of patient care. The Service Center Medical Informatics (SMI) of the University Hospital Würzburg developed and implemented the smartphone-based mobile application (MA) ukw.mobile1 that uses speech recognition for the point-of-care ordering of radiological examinations. The aim of this study was to examine the usability of the MA workflow for the point-of-care ordering of radiological examinations. All physicians at the Department of Trauma and Plastic Surgery at the University Hospital Würzburg, Germany, were asked to participate in a survey including the short version of the User Experience Questionnaire (UEQ-S) and the Unified Theory of Acceptance and Use of Technology (UTAUT). For the analysis of the different domains of user experience (overall attractiveness, pragmatic quality and hedonic quality), we used a two-sided dependent sample t-test. For the determinants of the acceptance model, we employed regression analysis. Twenty-one of 30 physicians (mean age 34 ± 8 years, 62% male) completed the questionnaire. Compared to the conventional desktop application (DA) workflow, the new MA workflow showed superior overall attractiveness (mean difference 2.15 ± 1.33), pragmatic quality (mean difference 1.90 ± 1.16), and hedonic quality (mean difference 2.41 ± 1.62; all p < .001). The user acceptance measured by the UTAUT (mean 4.49 ± 0.41; min. 1, max. 5) was also high. Performance expectancy (beta = 0.57, p = .02) and effort expectancy (beta = 0.36, p = .04) were identified as predictors of acceptance, the full predictive model explained 65.4% of its variance. Point-of-care mHealth solutions using innovative technology such as speech-recognition seem to address the users’ needs and to offer higher usability in comparison to conventional technology. Implementation of user-centered mHealth innovations might therefore help to facilitate physicians’ daily work.
Background
The importance of chronic kidney disease (CKD) and anaemia has not been comprehensively studied in asymptomatic patients at risk for heart failure (HF) versus those with symptomatic HF. We analysed the prevalence, characteristics and prognostic impact of both conditions across American College of Cardiology/American Heart Association (ACC/AHA) precursor and HF stages A–D.
Methods and results
2496 participants from three non-pharmacological German Competence Network HF studies were categorized by ACC/AHA stage; stage C patients were subdivided into C1 and C2 (corresponding to NYHA classes I/II and III, respectively). Overall, patient distribution was 8.1%/35.3%/32.9% and 23.7% in ACC/AHA stages A/B/C1 and C2/D, respectively. These subgroups were stratified by the absence ( – ) or presence ( +) of CKD (estimated glomerular filtration rate [eGFR] < 60 mL/min/1.73m2) and anaemia (haemoglobin in women/men < 12/ < 13 g/dL). The primary outcome was all-cause mortality at 5-year follow-up. Prevalence increased across stages A/B/C1 and C2/D (CKD: 22.3%/23.6%/31.6%/54.7%; anaemia: 3.0%/7.9%/21.7%/33.2%, respectively), with concordant decreases in median eGFR and haemoglobin (all p < 0.001). Across all stages, hazard ratios [95% confidence intervals] for all-cause mortality were 2.1 [1.8–2.6] for CKD + , 1.7 [1.4–2.0] for anaemia, and 3.6 [2.9–4.6] for CKD + /anaemia + (all p < 0.001). Population attributable fractions (PAFs) for 5-year mortality related to CKD and/or anaemia were similar across stages A/B, C1 and C2/D (up to 33.4%, 30.8% and 34.7%, respectively).
Conclusions
Prevalence and severity of CKD and anaemia increased across ACC/AHA stages. Both conditions were individually and additively associated with increased 5-year mortality risk, with similar PAFs in asymptomatic patients and those with symptomatic HF.
Purpose
A successful focused surgical approach in primary hyperparathyroidism (pHPT) relies on accurate preoperative localization of the parathyroid adenoma (PA). Most often, ultrasound is followed by [\(^{99m}\)Tc]-sestamibi scintigraphy, but the value of this approach is disputed. Here, we evaluated the diagnostic approach in patients with surgically treated pHPT in our center with the aim to further refine preoperative diagnostic procedures.
Methods
A single-center retrospective analysis of patients with pHPT from 01/2005 to 08/2021 was carried out followed by evaluation of the preoperative imaging modalities to localize PA. The localization of the PA had to be confirmed intraoperatively by the fresh frozen section and significant dropping of the intraoperative parathyroid hormone (PTH) levels.
Results
From 658 patients diagnosed with pHPT, 30 patients were excluded from the analysis because of surgery for recurrent or persistent disease. Median age of patients was 58.0 (13–93) years and 71% were female. Neck ultrasound was carried out in 91.7% and localized a PA in 76.6%. In 23.4% (135/576) of the patients, preoperative neck ultrasound did not detect a PA. In this group, [\(^{99m}\)Tc]-sestamibi correctly identified PA in only 25.4% of patients. In contrast, in the same cohort, the use of [\(^{11}\)C]-methionine or [\(^{11}\)C]-choline PET resulted in the correct identification of PA in 79.4% of patients (OR 13.23; 95% CI 5.24–33.56).
Conclusion
[\(^{11}\)C]-Methionine or [\(^{11}\)C]-choline PET/CT are superior second-line imaging methods to select patients for a focused surgical approach when previous ultrasound failed to identify PA.
Background
An intragastric balloon is used to cause weight loss in super-obese patients (BMI > 60 kg/m\(^2\)) prior to bariatric surgery. Whether weight loss from intragastric balloon influences that from bariatric surgery is poorly studied.
Methods
In this retrospective, single-center study, the effects of intragastric balloon in 26 patients (BMI 69.26 ± 6.81) on weight loss after bariatric surgery (primary endpoint), postoperative complications within 30 days, hospital readmission, operation time, and MTL30 (secondary endpoints) were evaluated. Fifty-two matched-pair patients without intragastric balloon prior to bariatric surgery were used as controls.
Results
Intragastric balloon resulted in a weight loss of 17.3 ± 14.1 kg (BMI 5.75 ± 4.66 kg/m\(^2\)) with a nadir after 5 months. Surgical and postoperative outcomes including complications were comparable between both groups. Total weight loss was similar in both groups (29.0% vs. 32.2%, p = 0.362). Direct postoperative weight loss was more pronounced in the control group compared to the gastric balloon group (29.16 ± 7.53% vs 23.78 ± 9.89% after 1 year, p < 0.05 and 32.13 ± 10.5% vs 22.21 ± 10.9% after 2 years, p < 0.05), who experienced an earlier nadir and started to regain weight during the follow-up.
Conclusion
A multi-stage therapeutic approach with gastric balloon prior to bariatric surgery in super-obese patients may be effective to facilitate safe surgery. However, with the gastric balloon, pre-treated patients experienced an attenuated postoperative weight loss with an earlier nadir and earlier body weight regain. This should be considered when choosing the appropriate therapeutic regime and managing patients’ expectations.