Triplet sensitization via charge recombination at organic heterojunction for efficient near-infrared to visible solid-state photon upconversion

Realizing efficient near-infrared to visible photon upconversion in the solid state is pivotal for commercial applications in various fields. We previously reported a solid-state upconversion device which imitated the photovoltaic conversion mechanisms of organic solar cells. This leads to a significant improvement of up to 2.3% in the external quantum efficiency, which is two orders of magnitude higher than that of conventional devices. Here, we investigate the upconversion mechanism of this device. We examine exciton and charge dynamics using transient absorption spectroscopy and find that approximately 67% of incident photons are utilized owing to fast singlet exciton diffusion in the nonfullerene acceptor layer. Strikingly, triplet excitons are accumulated near the donor/acceptor interface, enabling accelerated triplet–triplet annihilation by a factor of more than 10

A Rhabdomyosarcoma Arising in the Larynx of a Dog

A neoplastic nodular lesion, 2 × 3 cm in diameter, was found in the larynx of a 6-year-old spayed female dog. The tumor was ill-circumscribed, consisting histologically of large round cells with abundant cytoplasm interspersed with small round cells with less cytoplasm and occasional multinucleated cells (myotubes). Immunohistochemically, tumor cells were positive for myoglobin, desmin and vimentin in varying degrees, but negative for S-100 protein, GFAP or cytokeratin. Cytoplasmic myofilaments/myofibrils with a dense Z-line-like structure were seen, the fine structures of which were complemented by PTAH stain. Based on these findings, the tumor was diagnosed as a rhabdomyosarcoma, a very rare tumor in the larynx of dogs

Myocardial velocity gradient as a noninvasively determined index of left ventricular diastolic dysfunction in patients with hypertrophic cardiomyopathy

AbstractObjectivesWe investigated the utility of the peak negative myocardial velocity gradient (MVG) derived from tissue Doppler imaging (TDI) for evaluation of diastolic dysfunction in patients with hypertrophic cardiomyopathy (HCM).BackgroundHypertrophic cardiomyopathy is characterized by impaired diastolic function with abnormal stiffness and prolonged relaxation. However, it remains difficult to evaluate these defects noninvasively.MethodsBoth TDI and conventional echocardiography were performed in 36 patients with HCM and in 47 control subjects. Left ventricular (LV) pressure was measured simultaneously in all HCM patients and in 26 controls.ResultsThe peak negative MVG occurred soon after the isovolumic relaxation period during the initial phase of rapid filling (auxotonic relaxation). It was significantly smaller in HCM patients than in control subjects (2.32 ± 0.52/s vs. 4.82 ± 1.15/s, p < 0.0001); the cutoff value for differentiation between all HCM patients and 47 normal individuals was determined as 3.2/s. Both the left ventricular end-diastolic pressure (LVEDP) (19.6 ± 6.1 mm Hg vs. 6.5 ± 1.7 mm Hg, p < 0.0001) and the time constant of LV pressure decay during isovolumic diastole (tau) (44.0 ± 6.7 ms vs. 32.1 ± 5.5 ms, p < 0.0001) were increased in HCM patients compared with controls. The peak negative MVG was negatively correlated with both LVEDP (r= −0.75, p < 0.0001) and tau (r= −0.58, p < 0.0001).ConclusionsA reduced peak negative MVG reflects both prolonged relaxation and elevated LVEDP. The peak negative MVG might thus provide a noninvasive index of diastolic function, yielding unique information about auxotonic relaxation in patients with HCM

Multimodality imaging to identify lipid-rich coronary plaques and predict periprocedural myocardial injury: Association between near-infrared spectroscopy and coronary computed tomography angiography

BackgroundThis study compares the efficacy of coronary computed tomography angiography (CCTA) and near-infrared spectroscopy intravascular ultrasound (NIRS–IVUS) in patients with significant coronary stenosis for predicting periprocedural myocardial injury during percutaneous coronary intervention (PCI).MethodsWe prospectively enrolled 107 patients who underwent CCTA before PCI and performed NIRS–IVUS during PCI. Based on the maximal lipid core burden index for any 4-mm longitudinal segments (maxLCBI4mm) in the culprit lesion, we divided the patients into two groups: lipid-rich plaque (LRP) group (maxLCBI4mm ≥ 400; n = 48) and no-LRP group (maxLCBI4mm &lt; 400; n = 59). Periprocedural myocardial injury was a postprocedural cardiac troponin T (cTnT) elevation of ≥5 times the upper limit of normal.ResultsThe LRP group had a significantly higher cTnT (p = 0.026), lower CT density (p &lt; 0.001), larger percentage atheroma volume (PAV) by NIRS–IVUS (p = 0.036), and larger remodeling index measured by both CCTA (p = 0.020) and NIRS–IVUS (p &lt; 0.001). A significant negative linear correlation was found between maxLCBI4mm and CT density (rho = −0.552, p &lt; 0.001). Multivariable logistic regression analysis identified maxLCBI4mm [odds ratio (OR): 1.006, p = 0.003] and PAV (OR: 1.125, p = 0.014) as independent predictors of periprocedural myocardial injury, while CT density was not an independent predictor (OR: 0.991, p = 0.22).ConclusionCCTA and NIRS–IVUS correlated well to identify LRP in culprit lesions. However, NIRS–IVUS was more competent in predicting the risk of periprocedural myocardial injury

Significant association of RNF213 p.R4810K, a moyamoya susceptibility variant, with coronary artery disease

Background The genetic architecture of coronary artery disease has not been fully elucidated, especially in Asian countries. Moyamoya disease is a progressive cerebrovascular disease that is reported to be complicated by coronary artery disease. Because most Japanese patients with moyamoya disease carry the p.R4810K variant of the ring finger 213 gene (RNF213), this may also be a risk factor for coronary artery disease; however, this possibility has never been tested. Methods and results We genotyped the RNF213 p.R4810K variant in 956 coronary artery disease patients and 716 controls and tested the association between p.R4810K and coronary artery disease. We also validated the association in an independent population of 311 coronary artery disease patients and 494 controls. In the replication study, the p.R4810K genotypes were imputed from genome-wide genotyping data based on the 1000 Genomes Project. We used multivariate logistic regression analyses to adjust for well-known risk factors such as dyslipidemia and smoking habits. In the primary study population, the frequency of the minor variant allele was significantly higher in patients with coronary artery disease than in controls (2.04% vs. 0.98%), with an odds ratio of 2.11 (p = 0.017). Under a dominant model, after adjustment for risk factors, the association remained significant, with an odds ratio of 2.90 (95% confidence interval: 1.37-6.61; p = 0.005). In the replication study, the association was significant after adjustment for age and sex (odds ratio = 4.99; 95% confidence interval: 1.16-21.53; p = 0.031), although it did not reach statistical significance when further adjusted for risk factors (odds ratio = 3.82; 95% confidence interval: 0.87-16.77; p = 0.076). Conclusions The RNF213 p.R4810K variant appears to be significantly associated with coronary artery disease in the Japanese population

Geriatric nutritional risk index as readmission predictor in older adults with heart failure irrespective of ejection fraction

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Clinical study on the cerebral infarction accompanied with septic disseminated intravascular coagulation

OBJECTIVES: Patients with disseminated intravascular coagulation (DIC) due to sepsis often develop cerebral infarction; but the frequency, mechanism of onset and prognosis have not been fully elucidated. We reported courses and characteristics of septic DIC cases hospitalized in our hospital in the present study. METHODS: Patients with septic DIC who underwent brain imaging were selected. Vital signs, disorders of consciousness and blood test results at the time of onset were compared between cases that developed cerebral infarction (cerebral infarction group) and those that did not (non-infarction group).In cases of cerebral infarction, the site and the size of the infarct lesion were also described. RESULTS: In 27 septic DIC patients who underwent brain imaging, eight patients had cerebral infarction. Although the percentage of patients who survived in the cerebral infarction group (2/8, 25%) was lower than that in the non-infarction group (7/17, 37%), , no significant difference was observed as both group showed poor prognoses. Those two patients who survived in the cerebral infarction group had severe consciousness disturbance and poor functional prognosis. Although the body temperature was significantly lower and the blood pressure was higher in the cerebral infarction group, no significant difference was found in general blood tests, so we thought it would be necessary to look for other markers that could be indicators for the risk of cerebral infarction. In the cerebral infarction group, two cases had a single lesion, and six cases had multiple lesions. Of the latter, two cases had massive lesions with a diameter of 1.5 cm or greater, four cases had only small lesions with a diameter of less than 1.5 cm, and two cases had a mixture of both. Most of the patients had lesions in the vertebrobasilar artery, which suggested that the pathogenesis involves not only embolism due to microthrombi, but also vasculitis and intravascular inflammation. CONCLUSIONS: Cerebral infarction was observed highly frequently; eight out of 27 cases (29.6%) when brain imaging was undergone in septic DIC patients. The prognosis of patients with cerebral infarction was poor, but no difference from the non-infarction group was observed. In addition to embolism, the presence of inflammation is considered to be important for the onset. In order to predict the prognosis and determine a suitable treatment, it would be recommended to undergo brain imaging when patients with septic DIC have consciousness disturbance or elevated blood pressure, and do not have fever

Subjective assessment of effectiveness, quality of life, and psychological status of patients receiving botulinum toxin therapy for hemifacial spasm, blepharospasm, or cervical dystonia

OBJECTIVES: Evaluations of subjective effectiveness, quality of life (QOL), and mental status of patients receiving treatment with botulinum toxin (BTX) for hemifacial spasm (FS), blepharospasm (BS), and cervical dystonia (CD) were conducted using a self-administered questionnaire. METHODS: Eighty-eight patients who received BTX treatment in the stable stage were analyzed. A numerical rating scale was used to assess treatment effectiveness, home QOL, and social QOL. Anxiety and depression were examined using the hospital anxiety and depression scale. RESULTS: In men, the treatment effectiveness was 2.1±1.0 for FS patients, 2.8±0.5 for BS patients, and 4.0±2.0 for CD patients, which indicates that FS was more effectively treated than CD. QOL scores were higher and anxiety and depression scores were lower in FS patients than BS and CD patients. Overall, social QOL scores were lower than home QOL. A high prevalence ratio of depression was found in BS and CD patients. CONCLUSIONS: CD responded less effectively to BTX compared with FS and BS. Additionally, FS and BS patients exhibited similar treatment effects. All of these disorders affect the patient’s appearance, which can reduce self-esteem and social QOL and potentially cause anxiety and depression. BS and CD patients exhibited a higher prevalence of depression than FS patients, which indicates a relationship with the underlying mechanisms of dystonia. Asking patients about subjective effectiveness, QOL, and psychiatric status can help staff respond to patient issues