Microcirculation最新文献

{"title":"Impaired peripheral microvascular reactivity in patients with nonobstructive coronary artery disease","authors":"Zulkefli Sanip,&nbsp;Nurnajwa Pahimi,&nbsp;Nur Adilah Bokti,&nbsp;Zurkurnai Yusof,&nbsp;Mohd Sapawi Mohamed,&nbsp;W. Yus Haniff W. Isa,&nbsp;Aida Hanum Rasool","doi":"10.1111/micc.12807","DOIUrl":"10.1111/micc.12807","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This study aimed to determine whether peripheral microvascular reactivity is impaired in patients with nonobstructive coronary artery disease (NOCAD).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Stable patients presenting with angina were recruited and, based on results from coronary angiography, were categorized into OCAD (coronary stenosis of ≥50%) and NOCAD (stenosis &lt;50%) groups. A control group with no history of angina was also recruited. Forearm skin microvascular reactivity was measured using the laser Doppler blood perfusion monitor and the process of postocclusive skin reactive hyperemia (PORH).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Patients were categorized into OCAD (<i>n</i> = 42), NOCAD (<i>n</i> = 40), and control (<i>n</i> = 39) groups. Compared with the control group, the PORH perfusion percent change (PORH% change) was significantly lower in the OCAD and NOCAD groups. No significant differences were noted between the OCAD and NOCAD groups. Additionally, the NOCAD group without any coronary obstruction takes a longer time to reach peak perfusion and had lower PORH% change compared with the nonangina control group.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Angina patients with NOCAD have microvascular dysfunction as demonstrated by reduced magnitude of reperfusion with an ischemic stimulus. NOCAD patients without coronary obstruction also displayed a slower response to reperfusion.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9511850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lymphatic Pathophysiology","authors":"Sanjukta Chakraborty,&nbsp;Brandon J. Dixon,&nbsp;Joseph M. Rutkowski,&nbsp;Jorge A. Castorena-Gonzalez,&nbsp;Jerome W. Breslin","doi":"10.1111/micc.12806","DOIUrl":"10.1111/micc.12806","url":null,"abstract":"Lymphatic research has rapidly accelerated and evolved over the last few decades with more clinicians and basic scientists appreciating the huge impact of this vasculature.1 The lymphatic system, with its network of vessels and interconnected nodes, returns interstitial fluid to the blood circulation and is central in the maintenance of fluid homeostasis, immune surveillance, and uptake of dietary lipids.2,3 The development of cuttingedge genetic models and imaging tools to manipulate and visualize lymphatic vessels, coupled with bioengineering approaches applied to the fundamental physiology of lymphatic vessel function, has significantly impacted our current understanding of the critical roles played by lymphatics both during development and in pathophysiological conditions across a plethora of disease states. This Special Topic Issue showcases a collection of primary research and review articles that highlight the diverse roles of lymphatics in disease pathogenesis that could potentially be leveraged to develop novel targeted approaches for therapeutic interventions. The primary research articles in the issue take various approaches to manipulate or target lymphatic vessel growth and function in disease. For example, the study by Michalaki et al.4 describes the therapeutic potential of engineered human mesenchymal stem cells overexpressing vascular endothelial growth factor C (VEGFC), as an autologous cellbased therapeutic treatment, for alleviation of lymphatic dysfunction associated with secondary injury mediated lymphedema. The study by Mahamud et al.5 shows that transcription factor GATA2 promotes blood/lymph separation through platelets and that while lymphovenous valves are the only known sites of interaction between blood and lymphatic vessels, more unidentified sites of interaction possibly exist between blood and lymphatic vessels. Steinskog et al.6 used a rat model mimicking acute myeloid leukemia (AML) with cannulation of efferent lymphatic vessels from the spleen and liver and subsequent proteomic profiling. Their findings revealed a differential response in AMLcell infiltrated spleen and liver, indicating that interstitial fluid and efferent lymph can provide unique information about the specific microenvironment responses that are variable in target organs during AML progression. In the work by Jo et al.,7 the effects of five different components which comprise Goreisan, a traditional herbal formulation (used as a therapeutic in Japan to alleviate lymphedema symptoms), were investigated for their effects on mesenteric lymphatic pumping in rats. They showed that that acute exposure of two components of Goreisan decreased lymphatic pumping in isolated rat mesenteric collecting lymphatics while oral administration of Goreisan induced vascular endothelial growth factor receptor 3 (VEGFR3), in these lymphatic vessels. Jablon et al.8 describe the development of an innovative technique for routine isolation, culture and characterization","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 2-3","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9442087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enlargement of opisthenar microcirculatory area predicts impaired heart function in severe acute coronary syndrome patients","authors":"Chen Chen,&nbsp;Bai Lin Zhu,&nbsp;Wei Da Zheng,&nbsp;Zhen Yi Guo,&nbsp;Xin Jin,&nbsp;Zai Hao Zhao,&nbsp;Mei Hua Lin,&nbsp;Lan Cui,&nbsp;Yin Hua Zhang","doi":"10.1111/micc.12803","DOIUrl":"10.1111/micc.12803","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Impaired microcirculation in acute coronary syndrome (ACS) patients manifests inadequate recovery and adverse clinical outcome. Here, we analyzed correlations between peripheral microcirculation and heart function in ACS patients.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Opisthenar microvessel area (OMA) were measured with optical coherence tomography angiography (OCTA), cardiac functional indexes (echocardiograph) were assessed 48–72 h after therapeutic interventions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Results showed that OMA normalized with heart rate (OMA-HR) were significantly greater in ACS patients with percutaneous intervention (ACS-PCI, <i>n</i> = 25, stenosis &gt;80%) compared to those with pharmacological intervention (ACS-PI, <i>n</i> = 23, stenosis &lt;50%, <i>p</i> = .02). Ejection fraction (EF) and fractional shortening (FS), which were not different between two groups, showed negative correlations with OMA-HR in ACS-PCI (EF: <i>r</i> = −0.512, <i>p</i> = .009; FS: <i>r</i> = −0.594, <i>p</i> = .002). Cardiac output (CO) inversely correlated with OMA-HR in both groups (<i>r</i> = −0.697, <i>p</i> &lt; .0001; <i>r</i> = −0.527, <i>p</i> = .01). Neutrophil to lymphocyte ratio (NLR) on admission was greater in ACS-PCI group. NLR, which was negatively associated with EF or FS, was positively associated with OMA-HR in all patients. The area under the curve (AUC) for OMA-HR was 0.683 (specificity 0.696 and sensitivity 0.72, <i>p</i> = .02). OMA-HR at &gt;376.5 μm² predicts reduced FS and CO (<i>p</i> = .002, <i>p</i> = .005, respectively). Summary OMA-HR predicts inadequate recovery of the heart in severe ACS patients post-PCI.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9449213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fixing skeletal muscle PO2 eliminates hyperinsulinemic microvascular blood flow response","authors":"Brenda N. Wells,&nbsp;Gaylene M. Russell McEvoy,&nbsp;Hamza Shogan,&nbsp;Meghan E. Kiley,&nbsp;Graham M. Fraser","doi":"10.1111/micc.12805","DOIUrl":"https://doi.org/10.1111/micc.12805","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>To determine if insulin-mediated hyperemia is partially dependent on local muscle oxygen concentration.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Sprague–Dawley rats were anesthetized, and the extensor digitorum longus (EDL) was reflected onto an inverted microscope. Intravital video microscopy sequences were recorded during baseline and hyperinsulinemic euglycemia. The muscle was reflected over a glass stage insert (Experiment 1a and 1b), or over a gas exchange chamber (Experiment 2), and microvascular capillary blood flow was recorded during sequential changes (7%–12%–2%–7%) of oxygen (O₂) concentration. Blood flow was measured by the red blood cell supply rate (SR) in number of cells per second. All animal protocols were approved by Memorial University's Institutional Animal Care Committee.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>In Experiment 1a, SR increased from 8.0 to 14.0 cells/s at baseline to euglycemia (<i>p</i> = .01), while no significant SR variation was detected after performing a sham hyperinsulinemic euglycemic clamp (Experiment 1b). In Experiment 2, SR decreased at 12% O₂ and increased at 2% O₂, compared to 7% O₂, under both experimental conditions. Magnitude of SR responses to oxygen oscillations during euglycemia were not different to those at baseline at each O₂ concentration (<i>p</i> &gt; .9).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Our results suggest that increased blood flow observed in response to insulin is eliminated if tissue oxygen microenvironment is fixed at a given oxygen concentration.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50132922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between mean arterial pressure and sublingual microcirculation during major non-cardiac surgery: Post hoc analysis of a prospective cohort","authors":"Eleni Laou,&nbsp;Nikolaos Papagiannakis,&nbsp;Anastasia Michou,&nbsp;Nicoleta Ntalarizou,&nbsp;Dimitrios Ragias,&nbsp;Zacharoula Angelopoulou,&nbsp;Daniel I. Sessler,&nbsp;Athanasios Chalkias","doi":"10.1111/micc.12804","DOIUrl":"10.1111/micc.12804","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>To test the hypothesis that there is an association between mean arterial pressure (MAP) and sublingual perfusion during major surgery, and perhaps an identifiable harm threshold.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>This post hoc analysis of a prospective cohort included patients who had elective major non-cardiac surgery with a duration of ≥2 h under general anesthesia. We assessed sublingual microcirculation every 30 min using SDF+ imaging and determined the De Backer score, Consensus Proportion of Perfused Vessels (Consensus PPV), and the Consensus PPV (small). Our primary outcome was the relationship between MAP and sublingual perfusion which was evaluated with linear mixed effects modeling.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A total of 100 patients were included, with MAP ranging between 65 mmHg and 120 mmHg during anesthesia and surgery. Over a range of intraoperative MAPs between 65 and 120 mmHg, there were no meaningful associations between blood pressure and various measures of sublingual perfusion. There were also no meaningful changes in microcirculatory flow over 4.5 h of surgery.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>In patients having elective major non-cardiac surgery with general anesthesia, sublingual microcirculation is well maintained when MAP ranges between 65 and 120 mmHg. It remains possible that sublingual perfusion will be a useful marker of tissue perfusion when MAP is lower than 65 mmHg.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/micc.12804","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9510848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling lymphangiogenesis: Pairing in vitro and in vivo metrics","authors":"Aileen C. Suarez,&nbsp;Jennifer H. Hammel,&nbsp;Jennifer M. Munson","doi":"10.1111/micc.12802","DOIUrl":"10.1111/micc.12802","url":null,"abstract":"<p>Lymphangiogenesis is the mechanism by which the lymphatic system develops and expands new vessels facilitating fluid drainage and immune cell trafficking. Models to study lymphangiogenesis are necessary for a better understanding of the underlying mechanisms and to identify or test new therapeutic agents that target lymphangiogenesis. Across the lymphatic literature, multiple models have been developed to study lymphangiogenesis in vitro and in vivo. In vitro, lymphangiogenesis can be modeled with varying complexity, from monolayers to hydrogels to explants, with common metrics for characterizing proliferation, migration, and sprouting of lymphatic endothelial cells (LECs) and vessels. In comparison, in vivo models of lymphangiogenesis often use genetically modified zebrafish and mice, with in situ mouse models in the ear, cornea, hind leg, and tail. In vivo metrics, such as activation of LECs, number of new lymphatic vessels, and sprouting, mirror those most used in vitro, with the addition of lymphatic vessel hyperplasia and drainage. The impacts of lymphangiogenesis vary by context of tissue and pathology. Therapeutic targeting of lymphangiogenesis can have paradoxical effects depending on the pathology including lymphedema, cancer, organ transplant, and inflammation. In this review, we describe and compare lymphangiogenic outcomes and metrics between in vitro and in vivo studies, specifically reviewing only those publications in which both testing formats are used. We find that in vitro studies correlate well with in vivo in wound healing and development, but not in the reproductive tract or the complex tumor microenvironment. Considerations for improving in vitro models are to increase complexity with perfusable microfluidic devices, co-cultures with tissue-specific support cells, the inclusion of fluid flow, and pairing in vitro models of differing complexities. We believe that these changes would strengthen the correlation between in vitro and in vivo outcomes, giving more insight into lymphangiogenesis in healthy and pathological states.</p>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 2-3","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/micc.12802","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9436613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sublingual microcirculation and internal environment changes as early indications of sepsis: A prospective observational study","authors":"Yi Lu,&nbsp;Jun Yang,&nbsp;Peng Li,&nbsp;Fei Teng,&nbsp;Shubin Guo","doi":"10.1111/micc.12801","DOIUrl":"10.1111/micc.12801","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This study aims to investigate the changes in microcirculation and internal environment before sepsis in patients with infectious diseases.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>In this single-center prospective observational study, all patients did not meet the diagnostic criteria of sepsis 3.0 at admission. Blood samples and sublingual microcirculation were collected at admission, 24 and 48 h after admission.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A total of 101 patients completed this study. In total, 46 patients met the diagnostic criteria of sepsis 3.0 within 5 days after admission, while the remaining 55 patients did not. The platelet (PLT) was significantly lower in the sepsis patients (195.17 ± 63.89 vs. 242.02 ± 68.59, <i>p</i> = .01), Microvascular Flow Index (MFI) (2.45 ± 0.33 vs. 2.70 ± 0.18, <i>p</i> = .00) and Proportion of Perfused Vessels (PPV) (92.44 ± 4.45 vs. 95.88 ± 3.20, <i>p</i> = .00) were significantly lower, while Flow Heterogeneity Index (FHI) (0.32 ± 0.13 vs. 0.22 ± 0.10, <i>p</i> = .00) was significantly higher in the in the sepsis patients at admission. Decreased levels of MFI (<i>p</i> = .00, OR 0.02, 95% CI: 0.00, 0.15) and PLT (<i>p</i> = .00, OR 0.99, 95% CI: 0.98, 1.00) were independent risk factors for sepsis. Additionally, the 24 h PLT change rate (AUC 0.85, Cutoff −0.17, sensitivity 0.70, specificity 0.93, and Youden index 0.63) suggested a potential early warning effect for sepsis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Changes in microcirculation disturbance and the internal environment occurred before sepsis. The MFI and PLT are independent risk factors for sepsis. Sublingual microcirculation and PLT deterioration can be used as early warning indicators before sepsis.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/micc.12801","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9455440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isolation of lymph shows dysregulation of STAT3 and CREB pathways in the spleen and liver during leukemia development in a rat model","authors":"Eli Sihn Samdal Steinskog,&nbsp;Kenneth Finne,&nbsp;Marianne Enger,&nbsp;Lars Helgeland,&nbsp;Per Ole Iversen,&nbsp;Emmet McCormack,&nbsp;Helge Wiig,&nbsp;Olav Tenstad","doi":"10.1111/micc.12800","DOIUrl":"10.1111/micc.12800","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background and aims</h3>\u0000 \u0000 <p>Acute myeloid leukemia (AML) is a heterogeneous malignant condition characterized by massive infiltration of poorly differentiated white blood cells in the blood stream, bone marrow, and extramedullary sites. During leukemic development, hepatosplenomegaly is expected to occur because large blood volumes are continuously filtered through these organs. We asked whether infiltration of leukemic blasts initiated a response that could be detected in the interstitial fluid phase of the spleen and liver.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Material and Methods</h3>\u0000 \u0000 <p>We used a rat model known to mimic human AML in growth characteristics and behavior. By cannulating efferent lymphatic vessels from the spleen and liver, we were able to monitor the response of the microenvironment during AML development.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results and Discussion</h3>\u0000 \u0000 <p>Flow cytometric analysis of lymphocytes showed increased STAT3 and CREB signaling in spleen and depressed signaling in liver, and proteins related to these pathways were identified with a different profile in lymph and plasma in AML compared with control. Additionally, several proteins were differently regulated in the microenvironment of spleen and liver in AML when compared with control.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Interstitial fluid, and its surrogate efferent lymph, can be used to provide unique information about responses in AML-infiltered organs and substances released to the general circulation during leukemia development.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 2-3","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/micc.12800","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9434910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anxiety is associated with coronary microvascular dysfunction: Results from the CAMADA study","authors":"Ying Li,&nbsp;Weixian Xu,&nbsp;Lijun Guo","doi":"10.1111/micc.12798","DOIUrl":"10.1111/micc.12798","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>Coronary microvascular dysfunction (CMD) is an important component of ischemic heart disease. Here, we assessed the associations between anxiety/depression and CMD using coronary microvascular function indicators.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>The study included 81 patients (26 males and 55 females) with nonobstructive coronary artery disease. The symptoms of anxiety and depression were measured with Self-rating Anxiety Scale and Self-rating Depression Scale. Coronary microvascular function was assessed using coronary flow reserve (CFR) measured by transthoracic Doppler echocardiography.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The anxiety group had significantly lower CFR than that in the no-anxiety group (2.97 ± 0.63 vs. 3.40 ± 0.61, <i>p</i> = .029). In bivariate correlation analysis, anxiety was negatively associated with CFR (<i>r</i> = −.333, <i>p</i> = .002). In the multiple linear regression model, after adjusting for age, sex, BMI, hypertension, dyslipidemia, smoking status, and family history of premature coronary heart disease, anxiety was negatively associated with CFR (<i>β</i> = −.314, <i>p</i> = .008). When both anxiety and depression were included in the multiple linear regression model, anxiety was also negatively associated with CFR (<i>β</i> = −.345, <i>p</i> = .012).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Anxiety patients had lower CFR, anxiety was independently associated with CFR. Psychological disorders may play an important role in coronary microvascular dysfunction.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9448678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Statistical and topological summaries aid disease detection for segmented retinal vascular images","authors":"John T. Nardini,&nbsp;Charles W. J. Pugh,&nbsp;Helen M. Byrne","doi":"10.1111/micc.12799","DOIUrl":"10.1111/micc.12799","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>Disease complications can alter vascular network morphology and disrupt tissue functioning. Microvascular diseases of the retina are assessed by visual inspection of retinal images, but this can be challenging when diseases exhibit silent symptoms or patients cannot attend in-person meetings. We examine the performance of machine learning algorithms in detecting microvascular disease when trained on statistical and topological summaries of segmented retinal vascular images.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We compute 13 separate descriptor vectors (5 statistical, 8 topological) to summarize the morphology of retinal vessel segmentation images and train support vector machines to predict each image's disease classification from the summary vectors. We assess the performance of each descriptor vector, using five-fold cross validation to estimate their accuracy. We apply these methods to four datasets that were assembled from four existing data repositories; three datasets contain segmented retinal vascular images from one of the repositories, whereas the fourth “All” dataset combines images from four repositories.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Among the 13 total descriptor vectors considered, either a statistical Box-counting descriptor vector or a topological Flooding descriptor vector achieves the highest accuracy levels. On the combined “All” dataset, the Box-counting vector outperforms all other descriptors, including the topological Flooding vector which is sensitive to differences in the annotation styles between the different datasets.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Our work represents a first step to establishing which computational methods are most suitable for identifying microvascular disease and assessing their current limitations. These methods could be incorporated into automated disease assessment tools.</p>\u0000 </section>\u0000 </div>","PeriodicalId":18459,"journal":{"name":"Microcirculation","volume":"30 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9825606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}