keyword
MENU ▼
Read by QxMD icon Read
search

Stress Echo contrast

keyword
https://www.readbyqxmd.com/read/27726743/mr-imaging-of-pediatric-bone-marrow
#1
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
#2
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...
September 29, 2016: 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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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...
July 4, 2015: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/25809387/multi-modality-imaging-for-the-assessment-of-myocardial-perfusion-with-emphasis-on-stress-perfusion-ct-and-mr-imaging
#10
REVIEW
Sung Min Ko, Hweung Kon Hwang, Sung Mok Kim, Ihn Ho Cho
High-quality and non-invasive diagnostic tools for assessing myocardial ischemia are necessary for therapeutic decisions regarding coronary artery disease. Myocardial perfusion has been studied using myocardial contrast echo perfusion, single-photon emission computed tomography, positron emission tomography, cardiovascular magnetic resonance, and, more recently, computed tomography. The addition of coronary computed tomography angiography to myocardial perfusion imaging improves the specificity and overall diagnostic accuracy of detecting the hemodynamic significance of coronary artery stenosis...
June 2015: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/25678485/evaluation-of-18f-fluoride-pet-mr-and-pet-ct-in-patients-with-foot-pain-of-unclear-cause
#11
Isabel Rauscher, Ambros J Beer, Christoph Schaeffeler, Michael Souvatzoglou, Moritz Crönlein, Chlodwig Kirchhoff, Gunther Sandmann, Sebastian Fürst, Robert Kilger, Michael Herz, Sybille Ziegler, Markus Schwaiger, Matthias Eiber
UNLABELLED: Our objective was to compare the quality and diagnostic performance of (18)F-fluoride PET/MR imaging with that of (18)F-fluoride PET/CT imaging in patients with foot pain of unclear cause. METHODS: Twenty-two patients (9 men, 13 women; mean age, 48 ± 18 y; range, 20-78 y) were prospectively included in this study and underwent a single-injection dual-imaging protocol with (18)F-fluoride PET/CT and PET/MR. At a minimum, the PET/MR protocol included T1-weighted spin echo and proton-density fat-saturated sequences in 2 planes each with simultaneous acquisition of PET over 20 min...
March 2015: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/25515841/high-reproducibility-of-adenosine-stress-cardiac-mr-myocardial-perfusion-imaging-in-patients-with-non-ischaemic-dilated-cardiomyopathy
#12
Mark A Lawson, Susan P Bell, Douglas W Adkisson, Li Wang, Henry Ooi, Douglas B Sawyer, Marvin W Kronenberg
OBJECTIVE: To evaluate the reproducibility of first-pass contrast-enhanced cardiac MR (CMR) myocardial perfusion imaging in patients with non-ischaemic dilated cardiomyopathy (NIDCM). DESIGN: Prospective observational study. SETTING: Single centre, tertiary care hospital. PARTICIPANTS: 6 outpatient participants with NIDCM. OUTCOME: Reproducibility of semiquantitative myocardial perfusion analysis by CMR...
2014: BMJ Open
https://www.readbyqxmd.com/read/25270741/two-dimensional-global-longitudinal-strain-rate-is-a-preload-independent-index-of-systemic-right-ventricular-contractility-in-hypoplastic-left-heart-syndrome-patients-after-fontan-operation
#13
COMPARATIVE STUDY
Jana Schlangen, Colin Petko, Jan H Hansen, Miriam Michel, Christopher Hart, Anselm Uebing, Gunther Fischer, Kolja Becker, Hans-Heiner Kramer
BACKGROUND: Assessment of systemic right ventricular (RV) function in patients with hypoplastic left heart syndrome is important during long-term follow-up after Fontan repair. Traditional echocardiographic parameters to evaluate systolic ventricular function are affected by loading conditions. The only generally accepted load-independent parameter of systolic function, end systolic elastance (Ees), requires invasive catheterization. Therefore, we sought to determine if parameters obtained by 2-dimensional speckle tracking (2DST) were affected by acute changes in preload and correlated with catheterization-derived indices of RV contractility in hypoplastic left heart syndrome patients after Fontan palliation...
November 2014: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/24817644/three-dimensional-inversion-recovery-manganese-enhanced-mri-of-mouse-brain-using-super-resolution-reconstruction-to-visualize-nuclei-involved-in-higher-brain-function
#14
Dana S Poole, Esben Plenge, Dirk H J Poot, Egbert A J F Lakke, Wiro J Niessen, Erik Meijering, Louise van der Weerd
The visualization of activity in mouse brain using inversion recovery spin echo (IR-SE) manganese-enhanced MRI (MEMRI) provides unique contrast, but suffers from poor resolution in the slice-encoding direction. Super-resolution reconstruction (SRR) is a resolution-enhancing post-processing technique in which multiple low-resolution slice stacks are combined into a single volume of high isotropic resolution using computational methods. In this study, we investigated, first, whether SRR can improve the three-dimensional resolution of IR-SE MEMRI in the slice selection direction, whilst maintaining or improving the contrast-to-noise ratio of the two-dimensional slice stacks...
July 2014: NMR in Biomedicine
https://www.readbyqxmd.com/read/24523361/is-the-diagnostic-yield-of-myocardial-stress-perfusion-mri-impaired-by-three-vessel-coronary-artery-disease
#15
Bernhard Klumpp, S Miller, A Seeger, A E May, M P Gawaz, C D Claussen, U Kramer
BACKGROUND: Three-vessel coronary artery disease (CAD) comes along with globally reduced myocardial perfusion potentially restricting the demarcation of regional hypoperfusion in stress perfusion cardiac magnetic resonance imaging (MRI). PURPOSE: To evaluate whether stress perfusion cardiac MRI is capable of detecting myocardial hypoperfusion in patients with 3-vessel CAD reliably. MATERIAL AND METHODS: Two hundred and five patients with symptoms of CAD were included...
February 2015: Acta Radiologica
https://www.readbyqxmd.com/read/24516342/echocardiography-practice-insights-into-appropriate-clinical-use-technical-competence-and-quality-improvement-program
#16
REVIEW
Antoine Kossaify, Gilles Grollier
Echocardiography accounts for nearly half of all cardiac imaging techniques. It is a widely available and adaptable tool, as well as being a cost-effective and mainly a non-invasive test. In addition, echocardiography provides extensive clinical data, which is related to the presence or advent of different modalities (tissue Doppler imaging, speckle tracking imaging, three-dimensional mode, contrast echo, etc.), different approaches (transesophageal, intravascular, etc.), and different applications (ie, heart failure/resynchronization studies, ischemia/stress echo, etc...
2014: Clinical Medicine Insights. Cardiology
https://www.readbyqxmd.com/read/24380567/obesity-reduces-left-ventricular-strains-torsion-and-synchrony-in-mouse-models-a-cine-displacement-encoding-with-stimulated-echoes-dense-cardiovascular-magnetic-resonance-study
#17
Sage P Kramer, David K Powell, Christopher M Haggerty, Cassi M Binkley, Andrea C Mattingly, Lisa A Cassis, Frederick H Epstein, Brandon K Fornwalt
BACKGROUND: Obesity affects a third of adults in the US and results in an increased risk of cardiovascular mortality. While the mechanisms underlying this increased risk are not well understood, animal models of obesity have shown direct effects on the heart such as steatosis and fibrosis, which may affect cardiac function. However, the effect of obesity on cardiac function in animal models is not well-defined. We hypothesized that diet-induced obesity in mice reduces strain, torsion, and synchrony in the left ventricle (LV)...
2013: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/24126880/stress-echo-applications-beyond-coronary-artery-disease
#18
Eugenio Picano, Patricia A Pellikka
Stress echocardiography is an established method for the diagnosis and prognostic stratification of coronary artery disease. In the last few years, the tremendous technological and conceptual versatility of this technique has been increasingly applied in challenging diagnostic fields. Today, in the echocardiography laboratory we can detect not only ischaemia from coronary artery stenosis, but can also recognize abnormalities of the coronary microvessels, myocardium, heart valves, pulmonary circulation, alveolar-capillary barrier, and right ventricle...
April 2014: European Heart Journal
https://www.readbyqxmd.com/read/24072774/cardiac-mr-imaging-to-measure-myocardial-blood-flow-response-to-the-cold-pressor-test-in-healthy-smokers-and-nonsmokers
#19
Timothy A Fairbairn, Manish Motwani, Adam N Mather, John D Biglands, Abdulghani M Larghat, Aleksandra Radjenovic, John P Greenwood, Sven Plein
PURPOSE: To determine if myocardial perfusion cardiac magnetic resonance (MR) imaging can show changes in myocardial blood flow (MBF) during the cold pressor test (CPT) and can allow identification of the differing endothelial function of smokers and nonsmokers when compared during adenosine stress. MATERIALS AND METHODS: The study was approved by the institutional ethics review board and all participants gave informed written consent. Twenty-nine healthy volunteers (19 nonsmokers, 10 smokers; mean age ± standard deviation, 22 years ± 4) underwent 1...
January 2014: Radiology
https://www.readbyqxmd.com/read/24014387/left-ventricular-contractile-reserve-in-asymptomatic-primary-mitral-regurgitation
#20
Julien Magne, Haifa Mahjoub, Raluca Dulgheru, Philippe Pibarot, Luc A Pierard, Patrizio Lancellotti
AIMS: There are very few data regarding the assessment and prognostic value of left ventricular contractile reserve (LVCR) in asymptomatic patients with primary mitral regurgitation (MR). We aimed to quantify LVCR and to evaluate its usefulness for risk stratification in asymptomatic patients with primary MR. METHODS AND RESULTS: Comprehensive resting and exercise (EX) transthoracic echocardiography, including two-dimensional speckle tracking quantification, were performed in 115 consecutive asymptomatic patients with ≥ moderate degenerative MR and no LV dysfunction/dilatation...
June 21, 2014: European Heart Journal
keyword
keyword
83247
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"