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Cardiovascular perfusion

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https://www.readbyqxmd.com/read/29214611/coronary-risk-equivalence-of-diabetes-assessed-by-spect-mpi
#1
Donna Chelle V Morales, Sanjeev P Bhavnani, Alan W Ahlberg, Raja C Pullatt, Deborah M Katten, Donna M Polk, Gary V Heller
BACKGROUND: Several publications and guidelines designate diabetes mellitus (DM) as a coronary artery disease (CAD) risk equivalent. The aim of this investigation was to examine DM cardiac risk equivalence from the perspective of stress SPECT myocardial perfusion imaging (MPI). METHODS AND RESULTS: We examined cardiovascular outcomes (cardiac death or nonfatal MI) of 17,499 patients referred for stress SPECT-MPI. Patients were stratified into four categories: non-DM without CAD, non-DM with CAD, DM without CAD, and DM with CAD, and normal or abnormal perfusion...
December 6, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29214191/vascular-mechanotransduction-data-in-a-rodent-model-of-diabetes-pressure-induced-regulation-of-shp2-and-associated-signaling-in-the-rat-inferior-vena-cava
#2
Kevin M Rice, Nandini D P K Manne, Ravikumar Arvapalli, Gautam K Ginjupalli, Eric R Blough
The effect of diabetes on vascular mechano-transductive response is of great concern. Given the higher rate of vein graft failures associated with diabetes, understanding the multiple cellular and molecular events associated with vascular remodeling is of vital importance. This article represents data related to a study published in Cardiovascular Diabetology [1] (Rice et al., 2006) and Open Journal of Endocrine and Metabolic Diseases [2] (Rice et al., 2015) evaluating the effect of pressurization on rat inferior venae cavae (IVC)...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29212846/associations-of-del-301-303-alpha2b-adrenoceptor-gene-polymorphism-with-central-hemodynamic-parameters-in-the-northern-russian-population
#3
Vladimir N Melnikov, Victor Baranov, Irina Suvorova, Sergey Krivoschekov
The ADRA2B gene 301-303 I/D polymorphism is associated with various cardiovascular phenotypes. However, an association of genotypes with the timing structure of cardiac cycle remains unclear. The central hemodynamic parameters were assessed by pulse wave analysis in 63 healthy residents of Kola Peninsula (68 N) aged 27-65 years. The genotypes were determined by PCR. The multiple regression analysis adjusted for age, BMI, heart rate, and blood pressure revealed that II genotype carriers had higher values of augmentation index, ejection duration and lower SEVR than DD homozygotes...
December 6, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/29212807/the-independent-and-interactive-effects-of-incremental-heat-strain-orthostatic-stress-and-mild-hypohydration-on-cerebral-perfusion
#4
Rebekah A I Lucas, Luke C Wilson, Philip N Ainslie, Jui-Lin Fan, Kate N Thomas, James D Cotter
The purpose of this study was to identify the dose-dependent effects of heat strain and orthostasis (via lower-body negative pressure; LBNP), with and without mild hypohydration, on systemic function and cerebral perfusion. Eleven males (Mean ±SD: 27 ±7 y; body mass 77 ±6 kg), resting supine in a water-perfused suit, underwent progressive passive heating [0.5°C increments in core temperature (Tc, oesophageal to +2.0°C)] whilst euhydrated (EUH) or hypohydrated (HYPO, 1.5-2% body mass deficit). At each thermal state, mean cerebral artery blood velocity (MCAvmean, Transcranial Doppler), partial pressure of end-tidal carbon dioxide (PETCO2), heart rate (HR) and mean arterial blood pressure (MAP, photoplethysmography) were measured continuously during LBNP (0, -15, -30, -45 mm Hg)...
December 6, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29211841/perioperative-benefit-and-outcome-of-thoracic-epidural-in-esophageal-surgery-a-clinical-review
#5
P Feltracco, A Bortolato, S Barbieri, E Michieletto, E Serra, A Ruol, S Merigliano, C Ori
Surgery for esophageal cancer is a highly stressful and painful procedure, and a significant amount of analgesics may be required to eliminate perioperative pain and blunt the stress response to surgery. Proper management of postoperative pain has invariably been shown to reduce the incidence of postoperative complications and accelerate recovery. Neuraxial analgesic techniques after major thoracic and upper abdominal surgery have long been established to reduce respiratory, cardiovascular, metabolic, inflammatory, and neurohormonal complications...
December 2, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/29203235/sensibility-and-specificity-of-laser-speckle-contrast-imaging-according-to-endo-pat-index-in-type-1-diabetes
#6
Alessandra S de M Matheus, Maria de Fátima Bevilacqua da Matta, Eliete Leão Silva Clemente, Maria de Lourdes Guimarães Rodrigues, Débora Cristina Torres Valença, Marília B Gomes
OBJECTIVES: To find out an normality value for microvascular response (physiological and pharmacological) assessed through laser speckle contrast imaging (LSCI) based on Endo-PAT, which identifies the ones with Endothelial Dysfunction (ED) in patients with Type 1 Diabetes (T1D). METHODS: Patients with T1D, aged ≥12years underwent a clinical-epidemiological questionnaire. Fasting blood samples were obtained (lipid profile, glycemic control and levels of C-reactive protein)...
December 1, 2017: Microvascular Research
https://www.readbyqxmd.com/read/29202817/use-of-cardiovascular-magnetic-resonance-in-the-evaluation-of-a-giant-right-atrial-appendage-aneurysm-a-case-report-and-review-of-the-literature
#7
Lojan Sivakumaran, Karl Sayegh, Emile Mehanna, Frank W Sanchez, Jonathan Fields, Ricardo Cury
BACKGROUND: Right atrial appendage aneurysms are rare entities that may have significant clinical consequences. When co-existing with atrial fibrillation, patients are at risk of developing pulmonary or paradoxical systemic emboli. CASE PRESENTATION: An elderly patient presented to medical attention with symptoms of acute diverticulitis. On abdominal computed tomography, a massively enlarged right atrial appendage aneurysm was discovered incidentally. The aneurysm caused marked compression of the right ventricle and contained an area of hypoenhancement concerning for an intraluminal thrombus...
December 4, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29200864/efficacy-of-noninvasive-cardiac-imaging-tests-in-diagnosis-and-management-of-stable-coronary-artery-disease
#8
REVIEW
Ify R Mordi, Athar A Badar, R John Irving, Jonathan R Weir-McCall, J Graeme Houston, Chim C Lang
The aim of this review was to discuss the current literature regarding the utility of noninvasive imaging in diagnosis and management of stable coronary artery disease (CAD) including recent data from large randomized trials assessing diagnosis and prognosis. Current guidelines recommend revascularization in patients with refractory angina and in those with potential prognostic benefit. Appropriate risk stratification through noninvasive assessment is important in ensuring patients are not exposed to unnecessary invasive coronary angiograms...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/29199228/progression-of-time-dependent-changes-to-the-mechanisms-of-vasodilation-by-protease-activated-receptor-2-in-metabolic-syndrome
#9
Kana Maruyama, John J McGuire, Satomi Kagota
Protease-activated receptor 2 (PAR2) is a G protein-coupled receptor activated by serine proteases released from tissues or by synthetic peptide ligands administered pharmacologically. Its wide expression in the cardiovascular system, particularly within the endothelium, vasodilation activity, and link to increased expression of inflammatory cytokines positions PAR2 as a potentially important regulator of vascular pathology under conditions of tissue inflammation, and injury; and thus, a pharmaceutical target for new therapeutics...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29198637/-current-status-of-noninvasive-hemodynamics-in-hypertension
#10
G Waisman
Hypertension is a haemodynamic disorder resulting from a persistent mismatch between cardiac output and peripheral resistance. Hypertension undergoes haemodynamic progression during its natural history. Impedance cardiography is a method of evaluating the cardiovascular system that obtains haemodynamic information from beat to beat through the analysis of variations in the impedance of the thorax on the passage of an electric current. Impedance cardiography unmasks the haemodynamic deterioration underlying the increase in blood pressure as age and systolic blood pressure increases...
November 29, 2017: Hipertensión y Riesgo Vascular
https://www.readbyqxmd.com/read/29198595/-influence-of-the-professional-experience-of-the-clinical-cardiologist-on-the-adequacy-of-the-clinical-indications-of-myocardial-perfusion-gated-spect
#11
Alberto Dominguez-Rodriguez, Pablo Avanzas, Pedro Abreu-Gonzalez, Alejandro Sanchez Grande-Flecha, María Del Carmen García-Baute, María Ángeles Gómez
OBJECTIVE: During cardiology training, the cardiology fellow has to be trained in all things related to the indication, interpretation, and performing of nuclear cardiology studies using single photon emission computed tomography (SPECT). The aim of the present study was to analyse the relationship between the adequacy of indications of myocardial perfusion gated-SPECT and the years of experience since the completion of cardiology training. METHOD: A descriptive, retrospective analysis was performed on a single-centre register, in which the indications (adequate or inadequate use) were recorded according to myocardial perfusion gated-SPECT guidelines, prescribed by cardiologists of a university hospital...
November 30, 2017: Archivos de Cardiología de México
https://www.readbyqxmd.com/read/29197997/class-effects-of-sglt2-inhibitors-in-mouse-cardiomyocytes-and-hearts-inhibition-of-na-h-exchanger-lowering-of-cytosolic-na-and-vasodilation
#12
Laween Uthman, Antonius Baartscheer, Boris Bleijlevens, Cees A Schumacher, Jan W T Fiolet, Anneke Koeman, Milena Jancev, Markus W Hollmann, Nina C Weber, Ruben Coronel, Coert J Zuurbier
AIMS/HYPOTHESIS: Sodium-glucose cotransporter 2 (SGLT2) inhibitors (SGLT2i) constitute a novel class of glucose-lowering (type 2) kidney-targeted agents. We recently reported that the SGLT2i empagliflozin (EMPA) reduced cardiac cytosolic Na+ ([Na+]c) and cytosolic Ca2+ ([Ca2+]c) concentrations through inhibition of Na+/H+ exchanger (NHE). Here, we examine (1) whether the SGLT2i dapagliflozin (DAPA) and canagliflozin (CANA) also inhibit NHE and reduce [Na+]c; (2) a structural model for the interaction of SGLT2i to NHE; (3) to what extent SGLT2i affect the haemodynamic and metabolic performance of isolated hearts of healthy mice...
December 2, 2017: Diabetologia
https://www.readbyqxmd.com/read/29196995/epigenetics-and-preeclampsia-programming-of-future-outcomes
#13
Alberto Borges Peixoto, Liliam Cristine Rolo, Luciano Marcondes Machado Nardozza, Edward Araujo Júnior
Pregnancy is known to induce rapid, progressive, and substantial changes to the cardiovascular system, ultimately facilitating successful pregnancy outcomes. Women who develop hypertensive disorders during pregnancy are considered to have "failed" the cardiovascular stress test of pregnancy and likely represent a subpopulation with inadequate cardiovascular accommodation. Preeclampsia is a serious complication with a myriad of manifestations in both mother and offspring. This pregnancy syndrome is a polygenic disease and has now been linked to a greater incidence of cardiovascular disease...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29196910/radiopharmaceutical-tracers-for-cardiac-imaging
#14
Osamu Manabe, Tatsuya Kikuchi, Arthur J H A Scholte, Mohammed El Mahdiui, Ryuichi Nishii, Ming-Rong Zhang, Eriko Suzuki, Keiichiro Yoshinaga
Cardiovascular disease (CVD) is the leading cause of death and disease burden worldwide. Nuclear myocardial perfusion imaging with either single-photon emission computed tomography or positron emission tomography has been used extensively to perform diagnosis, monitor therapies, and predict cardiovascular events. Several radiopharmaceutical tracers have recently been developed to evaluate CVD by targeting myocardial perfusion, metabolism, innervation, and inflammation. This article reviews old and newer used in nuclear cardiac imaging...
December 1, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29191926/molecular-ultrasound-imaging-of-junctional-adhesion-molecule-a-depicts-acute-alterations-in-blood-flow-and-early-endothelial-dysregulation
#15
Adelina Curaj, Zhuojun Wu, Anne Rix, Oliver Gresch, Marieke Sternkopf, Setareh Alampour-Rajabi, Twan Lammers, Marc van Zandvoort, Christian Weber, Rory R Koenen, Elisa A Liehn, Fabian Kiessling
OBJECTIVE: The junctional adhesion molecule A (JAM-A) is physiologically located in interendothelial tight junctions and focally redistributes to the luminal surface of blood vessels under abnormal shear and flow conditions accompanying atherosclerotic lesion development. Therefore, JAM-A was evaluated as a target for molecularly targeted ultrasound imaging of transient endothelial dysfunction under acute blood flow variations. APPROACH AND RESULTS: Flow-dependent endothelial dysfunction was induced in apolipoprotein E-deficient mice (n=43) by carotid partial ligation...
November 30, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29189539/effect-of-continuous-systemic-administration-of-esmolol-on-intraocular-pressure-during-surgery-in-a-sustained-steep-trendelenburg-position
#16
Jin Joo, Jiyoung Kim, Jaemin Lee
PURPOSE: To investigate the effects of continuous systemic administration of esmolol on intraocular pressure (IOP) during laparoscopic and robotic surgeries for recto-sigmoid cancer in a steep Trendelenburg position. MATERIALS AND METHODS: A total of 50 patients undergoing laparoscopic surgery in a steep Trendelenburg position were included. Patients in the esmolol (E) group received a 0.25 mg/kg IV loading dose of esmolol before anesthesia, followed by an infusion of 15 μg/kg/min throughout the operation...
November 17, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29188429/spike-in-glucose-levels-after-reperfusion-during-aortic-surgery-assessment-by-continuous-blood-glucose-monitoring-using-artificial-endocrine-pancreas
#17
Koji Kawahito, Hirotaka Sato, Mamoru Kadosaki, Atsushi Egawa, Yoshio Misawa
OBJECTIVES: Although strict blood glucose control during cardiovascular surgery is essential to avoid postoperative complications, the various changes in glucose levels that occur during surgery have not been investigated in detail. In this study, we continuously monitored blood glucose changes during aortic surgery using the STG-55Ⓡ artificial endocrine pancreas (Nikkiso Inc., Tokyo). METHODS: Between December 2015 and 2016, we performed continuous blood glucose monitoring in 22 patients (14 men and 8 women, 72 ± 11 years old), who required hypothermic circulatory arrest during an ascending/aortic arch surgery, at the Jichi Medical University Hospital...
November 29, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29185370/effect-of-nicotine-on-placental-ischemia-induced-complement-activation-and-hypertension-in-the-rat
#18
Connor F Laule, Cameron R Wing, Evan J Odean, Jacob A Wilcox, Jeffrey S Gilbert, Jean F Regal
Preeclampsia is a pregnancy-specific condition manifested by new-onset maternal hypertension with systemic inflammation, including increased innate immune system complement activation. While exact pathophysiology is unknown, evidence suggests that inadequate spiral artery invasion and resulting utero-placental insufficiency is the initiating event. Cigarette smoking during pregnancy decreases the risk of preeclampsia. Nicotine, a major component of cigarettes, stimulates the efferent cholinergic anti-inflammatory pathway through peripherally expressed nicotinic acetylcholine receptors (nAChR) and is known to attenuate ischemia-reperfusion injury in kidney and liver...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/29183415/the-pre-participation-screening-in-young-athletes-which-protocol-do-we-need-exactly
#19
İbrahim I Çetin, Filiz Ekici, Ayşe E Kibar, Murat Sürücü, Ali Orgun
The aim was to assess the utility and feasibility of a comprehensive cardiac screening protocol in young athletes before participation in sports. A total of 380 athletes referring before participation in sports, between April, 2014 and April, 2015, were included in this study. The mean age was 12.4 years. A screening protocol has been applied to all, including personal and family history, physical examination, 12-lead electrocardiography, transthoracic echocardiography, 24-hour rhythm Holter analysis, and treadmill exercise test...
November 29, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/29178905/diagnostic-performance-of-semi-quantitative-and-quantitative-stress-cmr-perfusion-analysis-a-meta-analysis
#20
REVIEW
R van Dijk, M van Assen, R Vliegenthart, G H de Bock, P van der Harst, M Oudkerk
BACKGROUND: Stress cardiovascular magnetic resonance (CMR) perfusion imaging is a promising modality for the evaluation of coronary artery disease (CAD) due to high spatial resolution and absence of radiation. Semi-quantitative and quantitative analysis of CMR perfusion are based on signal-intensity curves produced during the first-pass of gadolinium contrast. Multiple semi-quantitative and quantitative parameters have been introduced. Diagnostic performance of these parameters varies extensively among studies and standardized protocols are lacking...
November 27, 2017: Journal of Cardiovascular Magnetic Resonance
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