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Stress Echo contrast

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https://www.readbyqxmd.com/read/28762934/-diagnostic-value-of-biochemical-markers-in-patients-with-chronic-heart-failure-with-reduced-borderline-and-preserved-left-ventricular-ejection-fraction
#1
E V Bazaeva, R P Myasnikov, V A Metelskaya, S A Boytsov
PURPOSE OF THE STUDY: The study of the diagnostic value of biochemical markers of myocardial stress and inflammation in chronic heart failure (CHF) with different values of the ejection fraction (EF) of the left ventricle (LV). MATERIAL AND METHODS: The cross-sectional study included 105 patients aged 24 to 84 years (mean 58+/-14 years) with stable chronic heart failure I-II NYHA functional class classification. The causes of CHF were ischemic heart disease (IHD) in 33% of patients and arterial hypertension (AH) - 67%...
March 2017: Kardiologiia
https://www.readbyqxmd.com/read/28751436/a-striking-image-of-spontaneous-echo-contrast-in-severe-mitral-stenosis-in-a-patient-with-good-international-normalised-ratio-inr-control
#2
Daniel A Jeffery, Guy Lloyd, Arjun K Ghosh
No abstract text is available yet for this article.
September 2017: Echo Research and Practice
https://www.readbyqxmd.com/read/28708228/clinical-and-subclinical-cardiac-late-effects-in-pediatric-hodgkin-s-lymphoma-survivors
#3
Carlo Materazzo, Maura Massimino, Elisabetta Schiavello, Marta Podda, Lorenza Gandola, Graziella Cefalo, Serena Catania, Cristina Meazza, Ivan Moschetti, Monica Terenziani
PURPOSE: Cardiac late effects are responsible for a significant burden of mortality and morbidity among pediatric Hodgkin's lymphoma (HL) survivors (HLS). The aim of our study was to assess clinical and subclinical cardiac sequelae in a cohort of childhood HLS treated in the 1980s with doxorubicin, bleomycin, vinblastine, and dacarbazine (the ABVD regimen) and limited-field radiotherapy (RT). METHODS: We retrospectively examined a series of HLS treated from 1979 to 1989...
July 8, 2017: Tumori
https://www.readbyqxmd.com/read/28637508/hyperpolarized-13-c-urea-myocardial-first-pass-perfusion-imaging-using-velocity-selective-excitation
#4
Maximilian Fuetterer, Julia Busch, Sophie M Peereboom, Constantin von Deuster, Lukas Wissmann, Miriam Lipiski, Thea Fleischmann, Nikola Cesarovic, Christian T Stoeck, Sebastian Kozerke
BACKGROUND: A velocity-selective binomial excitation scheme for myocardial first-pass perfusion measurements with hyperpolarized (13)C substrates, which preserves bolus magnetization inside the blood pool, is presented. The proposed method is evaluated against gadolinium-enhanced (1)H measurements in-vivo. METHODS: The proposed excitation with an echo-planar imaging readout was implemented on a clinical CMR system. Dynamic myocardial stress perfusion images were acquired in six healthy pigs after bolus injection of hyperpolarized (13)C urea with the velocity-selective vs...
June 21, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28600985/nox2-contributes-to-hyperinsulinemia-induced-redox-imbalance-and-impaired-vascular-function
#5
Abeer M Mahmoud, Mohamed M Ali, Edwin R Miranda, Jacob T Mey, Brian K Blackburn, Jacob M Haus, Shane A Phillips
Insulin resistance promotes vascular endothelial dysfunction and subsequent development of cardiovascular disease. Previously we found that skeletal muscle arteriolar flow-induced dilation (FID) was reduced following a hyperinsulinemic clamp in healthy adults. Therefore, we hypothesized that hyperinsulinemia, a hallmark of insulin resistance, contributes to microvascular endothelial cell dysfunction via inducing oxidative stress that is mediated by NADPH oxidase (Nox) system. We examined the effect of insulin, at levels that are comparable with human hyperinsulinemia on 1) FID of isolated arterioles from human skeletal muscle tissue in the presence and absence of Nox inhibitors and 2) human adipose microvascular endothelial cell (HAMECs) expression of nitric oxide (NO), endothelial NO synthase (eNOS), and Nox-mediated oxidative stress...
June 3, 2017: Redox Biology
https://www.readbyqxmd.com/read/28501327/echo-particle-image-velocimetry-for-estimation-of-carotid-artery-wall-shear-stress-repeatability-reproducibility-and-comparison-with-phase-contrast-magnetic-resonance-imaging
#6
Arati Gurung, Phillip E Gates, Luciano Mazzaro, Jonathan Fulford, Fuxing Zhang, Alex J Barker, Jean Hertzberg, Kunihiko Aizawa, William D Strain, Salim Elyas, Angela C Shore, Robin Shandas
Measurement of hemodynamic wall shear stress (WSS) is important in investigating the role of WSS in the initiation and progression of atherosclerosis. Echo particle image velocimetry (echo PIV) is a novel ultrasound-based technique for measuring WSS in vivo that has previously been validated in vitro using the standard optical PIV technique. We evaluated the repeatability and reproducibility of echo PIV for measuring WSS in the human common carotid artery. We measured WSS in 28 healthy participants (18 males and 10 females, mean age: 56 ± 12 y)...
May 10, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28442292/the-impact-of-gender-on-the-prognostic-value-of-dobutamine-stress-myocardial-contrast-echocardiography
#7
Constantina Aggeli, Kali Polytarchou, Ioannis Felekos, Kostas Zisimos, Erifili Venieri, Athanasios Verveniotis, Dimitrios Varvarousis, Kostantinos Toutouzas, Eleutherios Tsiamis, Dimitrios Tousoulis
BACKGROUND: Dobutamine stress contrast echo (DSCE) has a well-established prognostic value in the context of coronary artery disease (CAD). However, data regarding its prognostic capability separately in men and women are scarce. The aim of the current study was to assess gender-related differences in the prognostic performance of DSCE. METHODS: DSCE was performed in 2645 consecutive patients, who were classified in two groups depending on gender. Follow-up lasted 57...
April 22, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28320412/high-resolution-hemodynamic-profiling-of-murine-arteriovenous-fistula-using-magnetic-resonance-imaging-and-computational-fluid-dynamics
#8
Daniel Pike, Yan-Ting Shiu, Maheshika Somarathna, Lingling Guo, Tatyana Isayeva, John Totenhagen, Timmy Lee
BACKGROUND: Arteriovenous fistula (AVF) maturation failure remains a major cause of morbidity and mortality in hemodialysis patients. The two major etiologies of AVF maturation failure are early neointimal hyperplasia development and persistent inadequate outward remodeling. Although hemodynamic changes following AVF creation may impact AVF remodeling and contribute to neointimal hyperplasia development and impaired outward remodeling, detailed AVF hemodynamics are not yet fully known...
March 20, 2017: Theoretical Biology & Medical Modelling
https://www.readbyqxmd.com/read/28273720/recurrence-of-glioblastoma-is-associated-with-elevated-microvascular-transit-time-heterogeneity-and-increased-hypoxia
#9
Andreas Stadlbauer, Kim Mouridsen, Arnd Doerfler, Mikkel Bo Hansen, Stefan Oberndorfer, Max Zimmermann, Michael Buchfelder, Gertraud Heinz, Karl Roessler
Dynamic susceptibility contrast (DSC) perfusion MRI provide information about differences in macro- and microvasculature when executed with gradient-echo (GE; sensitive to macrovasculature) and spin-echo (SE; sensitive to microvasculature) contrast. This study investigated whether there are differences between macro- and microvascular transit time heterogeneity (MVTH and µVTH) and tissue oxygen tension (PO2mit) in newly-diagnosed and recurrent glioblastoma. Fifty-seven patients with glioblastoma (25 newly-diagnosed/32 recurrent) were examined with GE- and SE-DSC perfusion sequences, and a quantitative blood-oxygen-level-dependent (qBOLD) approach...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28130566/-stress-echocardiography-and-its-central-role-in-cardiac-diagnostics
#10
R Leischik, B Dworrak, T Cremer, S Amirie, H Littwitz
Stress echocardiography (SE) has an established central role as a diagnostic tool in cardiology. It is not only an established method for the diagnostic and prognostic stratification of patients with coronary artery disease but also shows an emerging value for assessment of cardiac function beyond coronary artery disease. The enormous conceptual technological development of ultrasound technology (Doppler, digitizing, tissue Doppler imaging, strain technology, 3‑D-echo and new ultrasound contrast agents) has led to applications of SE in almost all diagnostic fields of cardiology...
May 2017: Herz
https://www.readbyqxmd.com/read/28072472/sonographic-findings-of-chondral-avulsion-fractures-of-the-lateral-ankle-ligaments-in-children
#11
Manabu Maeda, Nana Maeda, Takanori Takaoka, Yasuhito Tanaka
In this series, we aimed to describe the sonographic findings of chondral avulsion fractures that develop concomitant with lateral ankle ligament injury in children. We performed stress sonography during a manual anterior drawer stress procedure of the ankle in 9 skeletally immature patients who had recently had a lateral ankle sprain. Echo videos were obtained through the course of treatment, and all videos were reviewed. We elucidated the common features of chondral avulsion fractures of the lateral ankle ligaments in the children...
February 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27726743/mr-imaging-of-pediatric-bone-marrow
#12
REVIEW
Brian Y Chan, Kara G Gill, Susan L Rebsamen, Jie C Nguyen
The bone marrow is one of the largest organs in the body and is visible in every magnetic resonance (MR) imaging study. It is composed of a combination of hematopoietic red marrow and fatty yellow marrow, and its composition changes throughout life in response to normal maturation (red to yellow conversion) and stress (yellow to red reconversion). MR imaging is highly sensitive for detection of altered marrow signal intensity, and the T1-weighted spin-echo sequence provides the most robust contrast between yellow marrow and disease...
October 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27687024/complementary-role-of-cardiovascular-imaging-and-laboratory-indices-in-early-detection-of-cardiovascular-disease-in-systemic-lupus-erythematosus
#13
REVIEW
S Mavrogeni, L Koutsogeorgopoulou, T Dimitroulas, G Markousis-Mavrogenis, G Kolovou
Background Cardiovascular disease (CVD) has been documented in >50% of systemic lupus erythematosus (SLE) patients, due to a complex interplay between traditional risk factors and SLE-related factors. Various processes, such as coronary artery disease, myocarditis, dilated cardiomyopathy, vasculitis, valvular heart disease, pulmonary hypertension and heart failure, account for CVD complications in SLE. Methods Electrocardiogram (ECG), echocardiography (echo), nuclear techniques, cardiac computed tomography (CT), cardiovascular magnetic resonance (CMR) and cardiac catheterization (CCa) can detect CVD in SLE at an early stage...
March 2017: Lupus
https://www.readbyqxmd.com/read/27648995/presence-and-site-matching-of-ischemia-at-stress-scintigraphy-or-contrast-stress-echo-in-individuals-developing-myocardial-infarction-within-3-months-does-stenosis-severity-matter
#14
Carmine Siniscalchi, Claudio Reverberi, Nicola Gaibazzi
BACKGROUND AND AIM: Individuals with ischemia during cardiac stress-test (cST) have a high risk of developing myocardial infarction (MI), but the pathophysiologic mechanism has never been clarified. It is thought that non flow-limiting coronary plaques (FLP) cause more often MI than FLP, but this is in contradiction with the predictive value of cST. We investigated the correspondence between reversible ischemia and location of subsequent MI, since functional assessment shortly before MI could clarify whether the culprit plaque is a FLP or not...
September 13, 2016: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/27511973/myocardial-contrast-stress-echo-versus-fractional-flow-reserve-a-fair-fight-among-ischemic-tests
#15
EDITORIAL
Morton J Kern, Arnold H Seto
No abstract text is available yet for this article.
August 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27076352/probe-oscillation-shear-elastography-prose-a-high-frame-rate-method-for-two-dimensional-ultrasound-shear-wave-elastography
#16
Daniel C Mellema, Pengfei Song, Randall R Kinnick, Matthew W Urban, James F Greenleaf, Armando Manduca, Shigao Chen
Ultrasound shear wave elastography (SWE) utilizes the propagation of induced shear waves to characterize the shear modulus of soft tissue. Many methods rely on an acoustic radiation force (ARF) "push beam" to generate shear waves. However, specialized hardware is required to generate the push beams, and the thermal stress that is placed upon the ultrasound system, transducer, and tissue by the push beams currently limits the frame-rate to about 1 Hz. These constraints have limited the implementation of ARF to high-end clinical systems...
September 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/26869634/ultrasound-contrast-during-stress-echo-for-obese-patients-but-not-only
#17
EDITORIAL
Nicola Gaibazzi
No abstract text is available yet for this article.
March 2016: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/26633671/age-and-aortic-diameters-in-pilots
#18
Ahmet Akın, Cengiz Ozturk, Mustafa Aparci, Tolga Cakmak, Suleyman Metin, Sevket Balta, Ahmet Sen
BACKGROUND: Pilots are exposed to various physical and hemodynamic stresses during flight. Aortic dilatation may be one of the important consequences of flight-related stress. In this study, we evaluated whether or not variation in aortic diameter was associated with the type of aircraft and the age of pilots. MATERIALS AND METHODS: Medical records of 87 jet aircraft pilots (JP) (mean age = 30.0 ± 7.0 years) and 65 non-jet aircraft pilots (NJP) (mean age = 32.63 ± 5...
December 2015: Military Medicine
https://www.readbyqxmd.com/read/26162465/stress-echocardiography-is-underused-in-clinical-practice-a-nationwide-survey-in-austria
#19
David Weidenauer, Philipp Bartko, Heidemarie Zach, Manfred Zehetgruber, Hans Domanovits, Senta Graf, Gerald Mundigler
BACKGROUND: The wide area of application, including coronary artery disease, valvular heart disease, or pulmonary hypertension makes stress echocardiography (SE) a powerful, cost-effective imaging modality in cardiology. The role of this technique in clinical practice in Austria is unknown. METHODS: A nationwide survey included all departments for cardiology and/or internal medicine in the years 2008 and 2013. By electronic questionnaire demographics, indication for the test, the numbers of examined cases per year, operators, and various applied techniques of SE were interrogated and completed by telephone interviews...
July 2015: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/26147785/an-echo-planar-imaging-sequence-is-superior-to-a-steady-state-free-precession-sequence-for-visual-as-well-as-quantitative-assessment-of-cardiac-magnetic-resonance-stress-perfusion
#20
COMPARATIVE STUDY
Britt-Marie Ahlander, Eva Maret, Lars Brudin, Sven-Ake Starck, Jan Engvall
BACKGROUND: To assess myocardial perfusion, steady-state free precession cardiac magnetic resonance (SSFP, CMR) was compared with gradient-echo-echo-planar imaging (GRE-EPI) using myocardial perfusion scintigraphy (MPS) as reference. METHODS: Cardiac magnetic resonance perfusion was recorded in 30 patients with SSFP and in another 30 patients with GRE-EPI. Timing and extent of inflow delay to the myocardium was visually assessed. Signal-to-noise (SNR) and contrast-to-noise (CNR) ratios were calculated...
January 2017: Clinical Physiology and Functional Imaging
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