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Microvascular disease of the heart

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https://www.readbyqxmd.com/read/29244159/pre-clinical-model-of-severe-glutathione-peroxidase-3-deficiency-and-chronic-kidney-disease-results-in-coronary-artery-thrombosis-and-depressed-left-ventricular-function
#1
Paul Pang, Molly Abbott, Malyun Abdi, Quynh-Anh Fucci, Nikita Chauhan, Murti Mistri, Brandon Proctor, Matthew Chin, Bin Wang, Wenqing Yin, Tzong-Shi Lu, Arvin Halim, Kenneth Lim, Diane E Handy, Joseph Loscalzo, Andrew M Siedlecki
Background: Chronic kidney disease (CKD) patients have deficient levels of glutathione peroxidase-3 (GPx3). We hypothesized that GPx3 deficiency may lead to cardiovascular disease in the presence of chronic kidney disease due to an accumulation of reactive oxygen species and decreased microvascular perfusion of the myocardium. Methods: To isolate the exclusive effect of GPx3 deficiency in kidney disease-induced cardiac disease, we studied the GPx3 knockout mouse strain (GPx3-/-) in the setting of surgery-induced CKD...
December 13, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29241208/exosomes-from-mir-126-overexpressing-adscs-are-therapeutic-in-relieving-acute-myocardial-ischaemic-injury
#2
Qiancheng Luo, Dongfeng Guo, Guorong Liu, Guo Chen, Min Hang, Mingming Jin
BACKGROUND/AIMS: Recent studies have indicated that exosomes play an important role in adipose-derived stem cell (ADSC) transplant-mediated ischaemic heart disease therapy. However, the treatment effect is not obvious. The aim of this study is to investigate whether ADSC-derived exosomes enriched with microRNA (miR)-126 have a more protective effect on acute myocardial infarction (AMI). METHODS: Exosomes were characterized by transmission electron microscopy, and the exosome particles were further examined using nanoparticle tracking analyses...
December 12, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29222822/coronary-microvascular-dysfunction-and-myocardial-contractile-reserve-in-women-with-angina-and-no-obstructive-coronary-artery-disease
#3
Marie M Michelsen, Adam Pena, Naja D Mygind, Jan Bech, Ida Gustafsson, Jens Kastrup, Henrik S Hansen, Nis Høst, Peter R Hansen, Eva Prescott
BACKGROUND: Coronary microvascular dysfunction (CMD) is a potential cause of myocardial ischemia and may affect myocardial function at rest and during stress. We investigated whether CMD was associated with left ventricular diastolic and systolic function at rest and during pharmacologically induced hyperemic stress. METHODS: In a prospective cohort study, we included 963 women with angina, left ventricular ejection fraction (LVEF) >45%, and an invasive coronary angiogram without significant stenosis (<50%)...
December 8, 2017: Echocardiography
https://www.readbyqxmd.com/read/29222132/invasive-assessment-of-the-coronary-microvasculature-the-index-of-microcirculatory-resistance
#4
REVIEW
William F Fearon, Yuhei Kobayashi
Traditionally, invasive coronary physiological assessment has focused on the epicardial coronary artery. More recently, appreciation of the importance of the coronary microvasculature in determining patient outcomes has grown. Several invasive modalities for interrogating microvascular function have been proposed. Angiographic techniques have been limited by their qualitative and subjective nature. Doppler wire-derived coronary flow reserve has been applied in research studies, but its clinical role has been limited by its lack of reproducibility, its lack of a clear normal value, and the fact that it is not specific for the microvasculature but interrogates the entire coronary circulation...
December 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29215470/invasive-assessment-of-microvascular-function-in-patients-with-valvular-heart-disease
#5
Takeshi Nishi, Hideki Kitahara, Saito Yuichi, Tomoko Nishi, Takashi Nakayama, Yoshihide Fujimoto, Goro Matsumiya, Yoshio Kobayashi
BACKGROUND: The aim of this study was to investigate microvascular function in patients with valvular heart disease (VHD), which causes chronic left ventricular volume and/or pressure overload, therefore change in coronary microvascular hemodynamics. PATIENTS AND METHODS: We prospectively enrolled 30 patients with VHD considered for surgery (10 aortic stenosis, 12 aortic regurgitation, and eight mitral regurgitation) and 30 controls. Intracoronary physiological assessments were performed in the unobstructed left anterior descending artery using a pressure-temperature sensor guidewire at rest and hyperemia...
December 5, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/29186452/gender-and-cardiovascular-disease-are-sex-biased-mirna-networks-a-driving-force-behind-heart-failure-with-preserved-ejection-fraction-in-women
#6
Barend W Florijn, Roel Bijkerk, Eric van der Veer, Anton Jan van Zonneveld
CVD is the primary cause of death among men and women worldwide. Nevertheless, our comprehension of how CVD progresses in women and elicits clinical outcomes is lacking, leading CVD to be under-diagnosed and under-treated in women. A clear example of this differential presentation of CVD pathophysiologies in females is the strikingly higher prevalence of heart failure with preserved ejection fraction (HFpEF). Women with a history of preeclampsia, or those that present co-morbidities such as obesity, hypertension and diabetes mellitus are at increased risk to develop HFpEF...
November 24, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29167183/evolution-of-subclinical-myocardial-dysfunction-detected-by-two-dimensional-and-three-dimensional-speckle-tracking-in-asymptomatic-type-1-diabetic-patients-a-long%C3%A2-term-follow-up-study
#7
Anne Ringle, Anne Dornhorst, Michaela B Rehman, Cristina Ruisanchez, Petros Nihoyannopoulos
BACKGROUND: We sought to assess the long-term evolution of left ventricular (LV) function using two-dimensional (2D) and three-dimensional (3D) speckle tracking echocardiography (STE) for the detection of preclinical diabetic cardiomyopathy, in asymptomatic type 1 diabetic patients, over a 6-year follow-up. DESIGN AND METHODS: Sixty-six asymptomatic type 1 diabetic patients with no cardiovascular risk factors were compared to 26 matched healthy controls. Conventional, 2D and 3D-STE were performed at baseline...
December 2017: Echo Research and Practice
https://www.readbyqxmd.com/read/29154426/microvascular-dysfunction-and-cardiac-fibrosis-in-heart-failure-with-preserved-ejection-fraction-a-case-report
#8
Nikhil Narang, Diego Medvedofsky, Kathryn Dryer, Sanjiv J Shah, Charles J Davidson, Amit R Patel, John E A Blair
We report the case of a 55-year-old woman with heart failure with preserved ejection fraction (HFpEF), who presented with hypertensive urgency and pulmonary oedema. The patient was medically optimized and underwent cardiac catheterization revealing pulmonary hypertension, elevated pulmonary capillary wedge pressure, normal cardiac index, and non-obstructive coronary disease. Invasive evaluation of coronary flow revealed blunted coronary flow reserve and increased index of microvascular resistance. Cardiac magnetic resonance imaging demonstrated reduced global myocardial perfusion and diffuse interstitial fibrosis...
November 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/29122140/cardiac-tissue-characterization-and-imaging-in-autoimmune-rheumatic-diseases
#9
REVIEW
Sophie I Mavrogeni, Petros P Sfikakis, Loukia Koutsogeorgopoulou, George Markousis-Mavrogenis, Theodoros Dimitroulas, Genovefa Kolovou, George D Kitas
Inflammation, microvascular and macrovascular ischemia, valvular disease, and fibrosis are the main causes of cardiovascular disease (CVD) in autoimmune rheumatic diseases (ARDs). The silent presentation and the high mortality and/or morbidity of CVD in ARDs necessitate a reliable tool for early diagnosis. Noninvasive cardiovascular imaging, including echocardiography, nuclear imaging, cardiovascular computed tomography (CT), cardiac magnetic resonance (CMR), and hybrid imaging modalities, constitutes the main tool for monitoring of CVD in ARDs...
November 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29120327/capillary-pericytes-mediate-coronary-no-reflow-after-myocardial-ischaemia
#10
Fergus M O'Farrell, Svetlana Mastitskaya, Matthew Hammond-Haley, Felipe Freitas, Wen Rui Wah, David Attwell
After cardiac ischaemia, a prolonged decrease of coronary microvascular perfusion often occurs even after flow is restored in an upstream artery. This 'no-reflow' phenomenon worsens patient prognosis. In the brain, after stroke, a similar post-ischaemic 'no-reflow' has been attributed to capillary constriction by contractile pericytes. We now show that occlusion of a rat coronary artery, followed by reperfusion, blocks 40% of cardiac capillaries and halves perfused blood volume within the affected region. Capillary blockages colocalised strongly with pericytes, where capillary diameter was reduced by 37%...
November 9, 2017: ELife
https://www.readbyqxmd.com/read/29117575/self-assembling-peptide-hydrogel-enables-instant-epicardial-coating-of-the-heart-with-mesenchymal-stromal-cells-for-the-treatment-of-heart-failure
#11
Yuki Ichihara, Masahiro Kaneko, Kenichi Yamahara, Marinos Koulouroudias, Nobuhiko Sato, Rakesh Uppal, Kenji Yamazaki, Satoshi Saito, Ken Suzuki
Transplantation of mesenchymal stromal cells (MSCs) is an emerging therapy for the treatment of heart failure. However, the delivery method of MSC is currently suboptimal. The use of self-assembling peptide hydrogels, including PuraMatrix(®) (PM; 3-D Matrix, Ltd), has been reported for clinical hemostasis and in research models. This study demonstrates the feasibility and efficacy of an advanced approach for MSC-therapy, that is coating of the epicardium with the instantly-produced PM hydrogel incorporating MSCs (epicardial PM-MSC therapy)...
October 31, 2017: Biomaterials
https://www.readbyqxmd.com/read/29114002/sdf-1%C3%AE-stromal-cell-derived-factor-1%C3%AE-induces-cardiac-fibroblasts-renal-microvascular-smooth-muscle-cells-and-glomerular-mesangial-cells-to-proliferate-cause-hypertrophy-and-produce-collagen
#12
Edwin K Jackson, Yumeng Zhang, Delbert D Gillespie, Xiao Zhu, Dongmei Cheng, Travis C Jackson
BACKGROUND: Activated cardiac fibroblasts (CFs), preglomerular vascular smooth muscle cells (PGVSMCs), and glomerular mesangial cells (GMCs) proliferate, cause hypertrophy, and produce collagen; in this way, activated CFs contribute to cardiac fibrosis, and activated PGVSMCs and GMCs promote renal fibrosis. In heart and kidney diseases, SDF-1α (stromal cell-derived factor 1α; endogenous CXCR4 [C-X-C motif chemokine receptor 4] receptor agonist) levels are often elevated; therefore, it is important to know whether and how the SDF-1α/CXCR4 axis activates CFs, PGVSMCs, or GMCs...
November 7, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29096622/tissue-engineered-smooth-muscle-cell-and-endothelial-progenitor-cell-bi-level-cell-sheets-prevent-progression-of-cardiac-dysfunction-microvascular-dysfunction-and-interstitial-fibrosis-in-a-rodent-model-of-type-1-diabetes-induced-cardiomyopathy
#13
Masashi Kawamura, Michael J Paulsen, Andrew B Goldstone, Yasuhiro Shudo, Hanjay Wang, Amanda N Steele, Lyndsay M Stapleton, Bryan B Edwards, Anahita Eskandari, Vi N Truong, Kevin J Jaatinen, Arnar B Ingason, Shigeru Miyagawa, Yoshiki Sawa, Y Joseph Woo
BACKGROUND: Diabetes mellitus is a risk factor for coronary artery disease and diabetic cardiomyopathy, and adversely impacts outcomes following coronary artery bypass grafting. Current treatments focus on macro-revascularization and neglect the microvascular disease typical of diabetes mellitus-induced cardiomyopathy (DMCM). We hypothesized that engineered smooth muscle cell (SMC)-endothelial progenitor cell (EPC) bi-level cell sheets could improve ventricular dysfunction in DMCM. METHODS: Primary mesenchymal stem cells (MSCs) and EPCs were isolated from the bone marrow of Wistar rats, and MSCs were differentiated into SMCs by culturing on a fibronectin-coated dish...
November 2, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29070069/adenosine-stress-cmr-t1-mapping-detects-early-microvascular-dysfunction-in-patients-with-type-2-diabetes-mellitus-without-obstructive-coronary-artery-disease
#14
Eylem Levelt, Stefan K Piechnik, Alexander Liu, Rohan S Wijesurendra, Masliza Mahmod, Rina Ariga, Jane M Francis, Andreas Greiser, Kieran Clarke, Stefan Neubauer, Vanessa M Ferreira, Theodoros D Karamitsos
BACKGROUND: Type 2 diabetes mellitus (T2DM) is associated with coronary microvascular dysfunction in the absence of obstructive coronary artery disease (CAD). Cardiovascular magnetic resonance (CMR) T1-mapping at rest and during adenosine stress can assess coronary vascular reactivity. We hypothesised that the non-contrast T1 response to vasodilator stress will be altered in patients with T2DM without CAD compared to controls due to coronary microvascular dysfunction. METHODS: Thirty-one patients with T2DM and sixteen matched healthy controls underwent CMR (3 T) for cine, rest and adenosine stress non-contrast T1-mapping (ShMOLLI), first-pass perfusion and late gadolinium enhancement (LGE) imaging...
October 25, 2017: Journal of Cardiovascular Magnetic Resonance
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
#15
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/29051079/reduced-myocardial-flow-reserve-is-associated-with-diastolic-dysfunction-and-decreased-left-atrial-strain-in-patients-with-normal-ejection-fraction-and-epicardial-perfusion
#16
Matthew C Konerman, Joshua C Greenberg, Theodore J Kolias, James R Corbett, Ravi V Shah, Venkatesh L Murthy, Scott L Hummel
INTRODUCTION: Coronary microvascular dysfunction (MVD) may contribute to the pathogenesis of heart failure with preserved ejection fraction (HFpEF). Speckle-tracking echocardiography is a feasible and reproducible method for identifying abnormalities in left ventricular (LV) and left atrial (LA) function among HFpEF patients. By assessing myocardial flow reserve (MFR), positron emission tomography (PET) imaging enables quantitative assessment of coronary MVD. We hypothesized that, in patients with risk factors for HFpEF and normal epicardial perfusion on cardiac PET, abnormal MFR is associated with LV diastolic dysfunction (DD) and reduced LV and LA strain...
October 16, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/29050745/a-spectrum-of-retinal-vasculature-measures-and-coronary-artery-disease
#17
Sarah B Wang, Paul Mitchell, Gerald Liew, Tien Yin Wong, Kevin Phan, Aravinda Thiagalingam, Nichole Joachim, George Burlutsky, Bamini Gopinath
BACKGROUND AND AIMS: We aimed to comprehensively describe a spectrum of retinal vessel measures including fractal dimension (Df) and their associations with indices of coronary artery disease (CAD) extent and severity, as well as hypertension and diabetes. METHODS: The Australian Heart Eye Study (AHES) is an observational study that surveyed 1680 participants presenting to a tertiary referral hospital for the evaluation of potential CAD by coronary angiography. A range of newer retinal vessel geometric measures (Df, curvature tortuosity, and branching angle) were quantified from retinal photographs using semi-automated software, the Singapore 'I' Vessel Assessment (SIVA) tool...
October 10, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29044139/diabetes-in-iran-prospective-analysis-from-first-nationwide-diabetes-report-of-national-program-for-prevention-and-control-of-diabetes-nppcd-2016
#18
Alireza Esteghamati, Bagher Larijani, Mohammad Haji Aghajani, Fatemeh Ghaemi, Jamshid Kermanchi, Ali Shahrami, Mohammad Saadat, Ensieh Nasli Esfahani, Morsaleh Ganji, Sina Noshad, Elias Khajeh, Alireza Ghajar, Behnam Heidari, Mohsen Afarideh, Jeffrey I Mechanick, Faramarz Ismail-Beigi
We estimated proportions of different types of diabetes, comorbidities, treatment (the use of oral glucose-lowering agents and insulin), control (hyperglycemia, dyslipidemia and hypertension) and chronic microvascular and macrovascular complications among people with diabetes presenting to the tertiary-care academic diabetes outpatient clinics in Iran. This study is the prospective analysis of data (n = 30,202) from the registry of university-affiliated adult outpatient diabetes clinics in the country during 2015-2016...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29038209/activation-and-inhibition-of-sodium-hydrogen-exchanger-is-a-mechanism-that-links-the-pathophysiology-and-treatment-of-diabetes-mellitus-with-that-of-heart-failure
#19
REVIEW
Milton Packer
The mechanisms underlying the progression of diabetes mellitus and heart failure are closely intertwined, such that worsening of one condition is frequently accompanied by worsening of the other; the degree of clinical acceleration is marked when the 2 coexist. Activation of the sodium-hydrogen exchanger in the heart and vasculature (NHE1 isoform) and the kidneys (NHE3 isoform) may serve as a common mechanism that links both disorders and may underlie their interplay. Insulin insensitivity and adipokine abnormalities (the hallmarks of type 2 diabetes mellitus) are characteristic features of heart failure; conversely, neurohormonal systems activated in heart failure (norepinephrine, angiotensin II, aldosterone, and neprilysin) impair insulin sensitivity and contribute to microvascular disease in diabetes mellitus...
October 17, 2017: Circulation
https://www.readbyqxmd.com/read/29027678/evaluation-of-carotid-plaque-neovascularization-in-patients-with-coronary-heart-disease-on-contrast-enhanced-ultrasonography
#20
Chuan Qin, Li Zhang, Xinfang Wang, Yilian Duan, Zhou Ye, Mingxing Xie
OBJECTIVES: To examine the repeatability of quantitative time-intensity curve analysis of neovascularization within carotid plaques with contrast-enhanced ultrasonography (US) and to investigate carotid plaque neovascularization in patients with coronary heart disease using contrast-enhanced US and the correlation between risk factors and acute coronary syndrome (ACS). METHODS: Sixty patients with ACS and 60 with stable coronary artery disease (CAD) underwent conventional carotid and contrast-enhanced US, and plaque enhancement was observed and analyzed quantitatively...
October 13, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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