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Coronary microcirculation

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https://www.readbyqxmd.com/read/29147131/transcriptional-activity-of-tumor-necrosis-factor-alpha-gene-in-peripheral-blood-mononuclear-cells-in-patients-with-coronary-slow-flow
#1
Yousef Rasmi, Morteza Bagheri, Sanaz Faramarz-Gaznagh, Mohadeseh Nemati, Mohammad Hasan Khadem-Ansari, Ehsan Saboory, Mir Hossein Seyed-Mohamadzad, Alireza Shirpoor
BACKGROUND: Coronary slow flow (CSF), an angiographic phenomenon that is characterized by a delayed coronary blood flow in the absence of obstructive coronary artery stenosis, is known as a disorder of the coronary microcirculation. Inflammation has an important role in the vascular hemostasis and endothelial dysfunction especially regarding monocyte adhesion and infiltration. Pro-inflammatory cytokines released by inflammatory cells result in endothelial cell dysfunction and cardiovascular diseases...
July 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29108788/peri-procedural-st-segment-resolution-during-primary-percutaneous-coronary-intervention-ppci-for-acute-myocardial-infarction-predictors-and-clinical-consequences
#2
Grigoris V Karamasis, Paul Russhard, Firas Al Janabi, Michael Parker, John R Davies, Thomas R Keeble, Gerald J Clesham
OBJECTIVE: ECG ST segment resolution (STR) has been used to assess myocardial perfusion in STEMI patients undergoing PPCI. However, in most of the studies ECGs recorded at different time points after the actual procedure have been used, limiting the options of therapeutic interventions while the patient is still in the catheterisation laboratory. The aim of this study was to investigate the presence and clinical consequences of intra-procedural STR during PPCI. METHODS: We analysed 12 lead ECGs recorded at the onset and the end of the PPCI procedure, measuring STR in the lead with maximum ST elevation on the initial recording...
October 5, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29105473/-effect-of-electroacupuncture-at-neiguan-pc-6-on-skin-microcirculation-blood-perfusion-volume-of-heart-related-acupoints-and-heart-irrelevant-acupoints-in-myocardial-ischemia-rats
#3
Jian Dai, Bo Ji, Ya-Wen Lu, Guo-Zhen Zhao, Dan Wang, Ming-Na Yan, Hong-Xin Bai, Xiao-Min Sun, Min You, Jiao-Juan Wu, Meng-Wei Guo, Zhi-Gang Li, Kai Cheng
OBJECTIVE: To observe the effect of low-frequency or high-frequency electroacupuncture (EA) stimulation of "Neiguan" (PC 6) on changes of skin blood perfusion volume of heart-related and heart-irrelevant acupoints in rats with normal or ischemic myocardium. METHODS: Wistar rats were randomly divided into the control, sham-operation, model, low-frequency EA and high-frequency EA groups (n=8 in each group). The myocardial ischemic (MI) model was established by occlusion of the anterior descending branch of the left coronary artery...
October 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29096829/ldl-apheresis-improves-coronary-flow-reserve-on-the-left-anterior-descending-artery-in-patients-with-familial-hypercholesterolemia-and-chronic-ischemic-heart-disease
#4
Tiziana Sampietro, Francesco Sbrana, Emilio Maria Pasanisi, Federico Bigazzi, Christina Petersen, Michele Coceani, Beatrice Dal Pino, Andrea Ripoli, Mascia Pianelli, Roberta Luciani
BACKGROUND: LDL apheresis (LA) influences the microcirculation, endothelial function and cardiovascular homeostasis. The aim of our study was to analyze temporal variations of coronary flow reserve (CFR) on the left anterior descending artery, obtained during dipyridamole stress echocardiography (DSE), in patients with severe familial hypercholesterolemia on LA (LA group) or not (not LA group) and ischemic heart disease (IHD). METHODS: The LA group consisted in 10 patients (mean age 65 ± 7 years, male 70%) with Familial Hypercholesterolemia and chronic IHD on maximally tolerated lipid lowering therapy and chronic LA treatment (median 7 years, interquartile range 6-14 years)...
November 2017: Atherosclerosis. Supplements
https://www.readbyqxmd.com/read/29095792/important-role-of-endothelial-caveolin-1-in-the-protective-role-of-edh-against-no-mediated-nitrative-stress-in-microcirculation-in-mice
#5
Hiroki Saito, Shigeo Godo, Saori Sato, Akiyo Ito, Yosuke Ikumi, Shuhei Tanaka, Tomoaki Ida, Shigemoto Fujii, Takaaki Akaike, Hiroaki Shimokawa
AIMS: Nitric oxide (NO) and endothelium-dependent hyperpolarization (EDH) play important roles in maintaining cardiovascular homeostasis. We have previously demonstrated that endothelial NO synthase (eNOS) plays diverse roles depending on vessel size, as a NO generating system in conduit arteries and an EDH-mediated system in resistance arteries, for which caveolin-1(Cav-1) is involved. However, the physiological role of endothelial Cav-1 in microvessels remains to be elucidated. METHODS AND RESULTS: We newly generated endothelium-specific Cav-1-knockout (eCav-1-KO) mice...
October 27, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/29073930/functional-evaluation-of-sublingual-microcirculation-indicates-successful-weaning-from-va-ecmo-in-cardiogenic-shock
#6
Sakir Akin, Dinis Dos Reis Miranda, Kadir Caliskan, Osama I Soliman, Goksel Guven, Ard Struijs, Robert J van Thiel, Lucia S Jewbali, Alexandre Lima, Diederik Gommers, Felix Zijlstra, Can Ince
BACKGROUND: Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is increasingly adopted for the treatment of cardiogenic shock (CS). However, a marker of successful weaning remains largely unknown. Our hypothesis was that successful weaning is associated with sustained microcirculatory function during ECMO flow reduction. Therefore, we sought to test the usefulness of microcirculatory imaging in the same sublingual spot, using incident dark field (IDF) imaging in assessing successful weaning from VA-ECMO and compare IDF imaging with echocardiographic parameters...
October 26, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29059651/-the-features-of-a-functional-state-of-the-coronary-circulation-in-women-smokers-with-non-st-elevation-acute-coronary-syndrome
#7
Тетяна М Соломенчук, Артем О Бедзай, Василь В Процько
INTRODUCTION: Acute coronary syndrome is one of the most adverse prognostic clinical forms of ischemic heart disease. In recent years, attention of researchers and cardiologists practical attract female patients due to a substantial increase in the prevalence including acute coronary syndrome, differences in the causes and features of its course. Women often diagnosed myocardial infarction without ST elevation and nonobstructive coronary heart disease associated with coronary spasm or stratification of coronary artery...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29051126/resistance-to-flow-in-the-coronary-microcirculation-we-can-measure-it-but-what-does-it-mean
#8
Amrit Bajrangee, Damien Collison, Keith G Oldroyd
No abstract text is available yet for this article.
October 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/29024896/identification-of-a-soluble-guanylate-cyclase-in-rbcs-preserved-activity-in-patients-with-coronary-artery-disease
#9
Miriam M Cortese-Krott, Evanthia Mergia, Christian M Kramer, Wiebke Lückstädt, Jiangning Yang, Georg Wolff, Christina Panknin, Thilo Bracht, Barbara Sitek, John Pernow, Johannes-Peter Stasch, Martin Feelisch, Doris Koesling, Malte Kelm
Endothelial dysfunction is associated with decreased NO bioavailability and impaired activation of the NO receptor soluble guanylate cyclase (sGC) in the vasculature and in platelets. Red blood cells (RBCs) are known to produce NO under hypoxic and normoxic conditions; however evidence of expression and/or activity of sGC and downstream signaling pathway including phopshodiesterase (PDE)-5 and protein kinase G (PKG) in RBCs is still controversial. In the present study, we aimed to investigate whether RBCs carry a functional sGC signaling pathway and to address whether this pathway is compromised in coronary artery disease (CAD)...
September 8, 2017: Redox Biology
https://www.readbyqxmd.com/read/28974326/relationships-between-periventricular-epicardial-adipose-tissue-accumulation-coronary-microcirculation-and-left-ventricular-diastolic-dysfunction
#10
Koki Nakanishi, Shota Fukuda, Atsushi Tanaka, Kenichiro Otsuka, Haruyuki Taguchi, Kenei Shimada
BACKGROUND: Obesity is related to left ventricular (LV) diastolic dysfunction, although its pathophysiological mechanism remains unclear. Epicardial adipose tissue (EAT) is an ectopic fat with paracrine effects on coronary circulation and myocardium. We hypothesized that left ventricle-specific (periventricular) EAT may deteriorate diastolic function by impairing coronary microcirculation. METHODS: In protocol 1, 74 patients without obstructive narrowing of the left anterior descending artery on multidetector computed tomography (MDCT) underwent coronary flow reserve (CFR) examination to evaluate the relationship between EAT and coronary microcirculation...
November 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28966326/bevacizumab-related-microvascular-angina-and-its-management-with-nicorandil
#11
Manami Katoh, Norihiko Takeda, Takahide Arimoto, Hajime Abe, Katsutoshi Oda, Yutaka Osuga, Tomoyuki Fujii, Issei Komuro
Bevacizumab, an inhibitor of vascular endothelial growth factor (VEGF)-A, is currently used to treat patients with ovarian or colon cancer. While several cardiovascular toxicities related to bevacizumab-containing regimens have been reported, the effect of bevacizumab on the coronary microcirculation has not been fully elucidated. Here we report a case of 54-year-old female patient who developed microvascular angina after a series of bevacizumab-containing chemotherapeutic regimen. The discontinuation of bevacizumab and nicorandil administration was effective in alleviating her chest discomfort and the ischemic changes on her ECG...
October 21, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28950375/interconnection-of-coronary-macro-and-microcirculation-to-each-other-each-component-has-relations-that-express-all-the-others
#12
Ornella Rimoldi
No abstract text is available yet for this article.
November 1, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28873951/position-paper-of-the-european-society-of-cardiology-working-group-of-coronary-pathophysiology-and-microcirculation-obesity-and-heart-disease
#13
Lina Badimon, Raffaele Bugiardini, Edina Cenko, Judit Cubedo, Maria Dorobantu, Dirk J Duncker, Ramón Estruch, Davor Milicic, Dimitris Tousoulis, Zorana Vasiljevic, Gemma Vilahur, Cor de Wit, Akos Koller
No abstract text is available yet for this article.
July 1, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28870422/quantitative-evaluation-of-capillaroscopic-microvascular-changes-in-patients-with-established-coronary-heart-disease
#14
M Esther Sanchez-Garcia, Irene Ramirez-Lara, Francisco Gomez-Delgado, Elena M Yubero-Serrano, Ana Leon-Acuña, Carmen Marin, Juan F Alcala-Diaz, Antonio Camargo, Javier Lopez-Moreno, Pablo Perez-Martinez, Francisco José Tinahones, Jose M Ordovas, Javier Caballero, Angeles Blanco-Molina, Jose Lopez-Miranda, Javier Delgado-Lista
INTRODUCTION AND OBJECTIVES: Microcirculation disturbances have been associated to most of the cardiovascular risk factors as well as to multiple inflammatory diseases. However, whether these abnormalities are specifically augmented in patients with coronary heart disease is still unknown. We aimed to evaluate if there is a relationship between the presence of coronary heart disease and the existence of functional and structural capillary abnormalities evaluated in the cutaneous microcirculation by videocapillaroscopy...
September 1, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28844029/state-of-the-art-pressure-wire-and-coronary-functional-assessment
#15
Mauro Echavarría-Pinto, Carlos Collet, Javier Escaned, Jan J Piek, Patrick W Serruys
The pressure wire has revolutionised cardiology by moving the focus of revascularisation from anatomy to physiology. This review provides a comprehensive viewpoint on the foundations of the field of intracoronary physiology, with emphasis on the development and clinical evidence of fractional flow reserve (FFR). Additionally, we critically appraise clinical decision making based on the evolving area of resting coronary physiology. The emerging role of coronary flow reserve and its complementariness with FFR is also discussed, and the importance of the invasive assessment of the coronary microcirculation in outlining prognosis is put into perspective...
August 25, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28834795/microvascular-reactivity-monitored-with-near-infrared-spectroscopy-is-impaired-after-induction-of-anaesthesia-in-cardiac-surgery-patients-an-observational-study
#16
Lien Vandenbulcke, Koen G Lapage, Katrien V Vanderstraeten, Filip M De Somer, Stefan G De Hert, Annelies T Moerman
BACKGROUND: Induction of anaesthesia causes significant macrohaemodynamic changes, but little is known about its effects on the microcirculation. However, alterations in microvascular perfusion are known to be associated with impaired tissue oxygenation and organ dysfunction. Microvascular reactivity can be assessed with vascular occlusion testing, which evaluates the response of tissue oxygen saturation to transient ischaemia and reperfusion. OBJECTIVE: The aim of the current study was to evaluate the effects of an opioid-based anaesthesia induction on microvascular reactivity...
October 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28794138/quantitative-assessment-of-coronary-microvascular-function-dynamic-single-photon-emission-computed-tomography-positron-emission-tomography-ultrasound-computed-tomography-and-magnetic-resonance-imaging
#17
REVIEW
Attila Feher, Albert J Sinusas
A healthy, functional microcirculation in combination with nonobstructed epicardial coronary arteries is the prerequisite of normal myocardial perfusion. Quantitative assessment in myocardial perfusion and determination of absolute myocardial blood flow can be achieved noninvasively using dynamic imaging with multiple imaging modalities. Extensive evidence supports the clinical value of noninvasively assessing indices of coronary flow for diagnosing coronary microvascular dysfunction; in certain diseases, the degree of coronary microvascular impairment carries important prognostic relevance...
August 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28762749/thrombospondin-1-free-radicals-and-the-coronary-microcirculation-the-aging-conundrum
#18
Amanda J LeBlanc, Natia Q Kelm
SIGNIFICANCE: Successful matching of cardiac metabolism to perfusion is accomplished primarily through vasodilation of the coronary resistance arterioles, but the mechanism that achieves this effect changes significantly as aging progresses and involves the contribution of reactive oxygen species (ROS). Recent Advances: A matricellular protein, thrombospondin-1 (Thbs-1), has been shown to be a prolific contributor to the production and modulation of ROS in large conductance vessels and in the peripheral circulation...
October 20, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28758150/diabetes-and-cardioplegia
#19
Brittany A Potz, Laura A Scrimgeour, Jun Feng, Frank W Sellke
Cardiac surgery with cardiopulmonary bypass and cardioplegic arrest is associated with injury to the vasculature and microcirculation leading to coronary microvascular dysfunction, permeability changes and cardiac dysfunction. In the setting of cardiopulmonary bypass with cardioplegia, poorly-controlled diabetes is associated with significant changes in endothelium-dependent and independent vascular dysfunction, vascular reactivity, vascular permeability, protein expression, cell death, coronary/peripheral microcirculation and reduced vasomotor tone leading to hypotension and impaired endothelial function...
June 2017: Journal of Nature and Science
https://www.readbyqxmd.com/read/28755080/erratum-to-non-invasive-measures-of-coronary-microcirculation-taking-the-long-road-to-the-clinic
#20
Kieran S Chung, Patricia K Nguyen
No abstract text is available yet for this article.
July 28, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
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