keyword
MENU ▼
Read by QxMD icon Read
search

Cardiac magnetic resonance

keyword
https://www.readbyqxmd.com/read/28921669/respiratory-variation-in-left-ventricular-cardiac-function-with-3d-double-golden-angle-whole-heart-cine-imaging
#1
Karen Holst, Martin Ugander, Andreas Sigfridsson
PURPOSE: To develop a 3-dimensional free-breathing cardiovascular MR technique for quantifying the variation in left ventricular end-diastolic volume (LVEDV) during the respiratory cycle. METHODS: A 3-dimensional radial trajectory with double golden-angle ordering was used for free-running data acquisition during free breathing in healthy volunteers (N = 8). A respiratory self-gating signal was extracted from the center of k-space, and data were retrospectively binned into eight respiratory phases in end-diastole...
September 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28921631/validation-of-highly-accelerated-real-time-cardiac-cine-mri-with-radial-k-space-sampling-and-compressed-sensing-in-patients-at-1-5t-and-3t
#2
Hassan Haji-Valizadeh, Amir A Rahsepar, Jeremy D Collins, Elwin Bassett, Tamara Isakova, Tobias Block, Ganesh Adluru, Edward V R DiBella, Daniel C Lee, James C Carr, Daniel Kim
PURPOSE: To validate an optimal 12-fold accelerated real-time cine MRI pulse sequence with radial k-space sampling and compressed sensing (CS) in patients at 1.5T and 3T. METHODS: We used two strategies to reduce image artifacts arising from gradient delays and eddy currents in radial k-space sampling with balanced steady-state free precession readout. We validated this pulse sequence against a standard breath-hold cine sequence in two patient cohorts: a myocardial infarction (n = 16) group at 1...
September 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28920862/enhanced-endothelium-epithelial-sodium-channel-signaling-prompts-left-ventricular-diastolic-dysfunction-in-obese-female-mice
#3
Guanghong Jia, Javad Habibi, Annayya R Aroor, Michael A Hill, Vincent G DeMarco, Li E Lee, Lixin Ma, Brady J Barron, Adam Whaley-Connell, James R Sowers
OBJECTIVE: Enhanced activation of cell specific mineralocorticoid receptors (MRs) in obesity plays a key role in the development of cardiovascular disease including cardiac diastolic dysfunction as a critical prognosticator. Our previous investigations demonstrated that selective endothelium MR activation promotes a maladaptive inflammatory response and fibrosis in cardiovascular tissue in female mice fed a western diet (WD), and this was associated with expression and activation of the epithelial sodium channel on the surface of endothelial cells (EnNaC)...
September 8, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28919800/renal-sympathetic-denervation-increases-renal-blood-volume-per-cardiac-cycle-a-serial-magnetic-resonance-imaging-study-in-resistant-hypertension
#4
Sinny Delacroix, Ramesh G Chokka, Adam J Nelson, Dennis T Wong, Samuel Sidharta, Stephen M Pederson, Adil Rajwani, Joanne Nimmo, Karen S Teo, Stephen G Worthley
AIM: Preclinical studies have demonstrated improvements in renal blood flow after renal sympathetic denervation (RSDN); however, such effects are yet to be confirmed in patients with resistant hypertension. Herein, we assessed the effects of RSDN on renal artery blood flow and diameter at multiple time points post-RSDN. METHODS AND RESULTS: Patients (n=11) with systolic blood pressures ≥160 mmHg despite taking three or more antihypertensive medications at maximum tolerated dose were recruited into this single-center, prospective, non-blinded study...
2017: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/28918213/myocardium-at-risk-assessed-by-electrocardiographic-scores-and-cardiovascular-magnetic-resonance-a-mitocare-substudy
#5
Maria Sejersten, Yama Fakhri, Marianne Pape, Svend Eggert Jensen, Einar Heiberg, Henrik Engblom, Trygve S Hall, Dan Atar, Peter Clemmensen
INTRODUCTION: The myocardium at risk (MaR) represents the quantitative ischemic area destined to myocardial infarction (MI) if no reperfusion therapy is initiated. Different ECG scores for MaR have been developed, but there is no consensus as to which should be preferred. OBJECTIVE: Comparisons of ECG scores and Cardiac Magnetic Resonance (CMR) for determining MaR. METHODS: MaR was determined by 3 different ECG scores, and by CMR in ST-segment elevation MI (STEMI) patients from the MITOCARE cardioprotection trial...
August 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28918207/the-association-between-cardiac-physiology-acquired-brain-injury-and-postnatal-brain-growth-in-critical-congenital-heart-disease
#6
Shabnam Peyvandi, Hosung Kim, Joanne Lau, A James Barkovich, Andrew Campbell, Steven Miller, Duan Xu, Patrick McQuillen
OBJECTIVE: To assess the trajectory of perioperative brain growth in relationship to cardiac diagnosis and acquired brain injuries. METHODS: This was a cohort study of term neonates with hypoplastic left heart syndrome (HLHS) and transposition of the great arteries (TGA). Subjects underwent magnetic resonance imaging of the brain pre- and postoperatively to determine the severity of brain injury and total and regional brain volumes by the use of automated morphometry...
August 24, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28916243/feasibility-and-accuracy-of-automated-software-for-transthoracic-three-dimensional-left-ventricular-volume-and-function-analysis-comparisons-with-two-dimensional-echocardiography-three-dimensional-transthoracic-manual-method-and-cardiac-magnetic-resonance-imaging
#7
Gloria Tamborini, Concetta Piazzese, Roberto M Lang, Manuela Muratori, Elisa Chiorino, Massimo Mapelli, Laura Fusini, Sarah Ghulam Ali, Paola Gripari, Gianluca Pontone, Daniele Andreini, Mauro Pepi
BACKGROUND: Recently, a new automated software package (HeartModel) was developed to obtain three-dimensional (3D) left ventricular (LV) volumes using a model-based algorithm (MBA) with a "one-button" simple system and user-adjustable slider. The aims of this study were to verify the feasibility and accuracy of the MBA in comparison with other commonly used imaging techniques in a large unselected population, to evaluate possible accuracy improvements of free operator border adjustments or changes of the slider's default position, and to identify differences in method accuracy related to specific pathologies...
September 12, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28915139/left-and-right-ventricular-morphology-function-and-late-gadolinium-enhancement-extent-and-localization-change-with-different-clinical-presentation-of-acute-myocarditis-data-from-the-italian-multicenter-study-on-myocarditis-itamy
#8
Gianluca Di Bella, Giovanni Camastra, Lorenzo Monti, Santo Dellegrottaglie, Paolo Piaggi, Claudio Moro, Alessia Pepe, Chiara Lanzillo, Gianluca Pontone, Martina Perazzolo Marra, Mauro Di Roma, Alessandra Scatteia, Giovanni D Aquaro
AIMS: Poor data exist about cardiac magnetic resonance (CMR) findings in a large sample of acute myocarditis with different clinical presentations (heart failure, arrhythmias, and infarct-like presentation). METHODS: Five hundred and forty-three in-patients with a clinical suspected of acute myocarditis confirmed by CMR were enrolled. The clinical indications to perform CMR were chest pain and/or dyspnea and/or palpitations, or effort intolerance/malaise in the last month; elevated troponin and/or new ventricular dysfunction, and/or new ECG abnormalities; and suspected inflammatory cause...
September 14, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28914601/left-ventricular-long-axis-function-assessed-with-cardiac-cine-mr-imaging-is-an-independent-predictor-of-all-cause-mortality-in-patients-with-reduced-ejection-fraction-a-multicenter-study
#9
Simone Romano, Robert M Judd, Raymond J Kim, Han W Kim, Igor Klem, John F Heitner, Dipan J Shah, Jennifer Jue, Afshin Farzaneh-Far
Purpose To evaluate the prognostic value of a simple index of left ventricular (LV) long-axis function-lateral mitral annular plane systolic excursion (MAPSE)-in a large multicenter population of patients with reduced ejection fraction (EF) who were undergoing cardiac magnetic resonance (MR) imaging. Materials and Methods This retrospective study included 1040 consecutive patients (mean age, 59.5 years ± 15.8) at four U.S. medical centers who were undergoing cardiac MR imaging for assessment of LV dysfunction with EF less than 50%...
September 14, 2017: Radiology
https://www.readbyqxmd.com/read/28912188/modern-imaging-techniques-in-cardiomyopathies
#10
REVIEW
M Fuad Jan, A Jamil Tajik
Modern advanced imaging techniques have allowed increasingly more rigorous assessment of the cardiac structure and function of several types of cardiomyopathies. In contemporary cardiology practice, echocardiography and cardiac magnetic resonance imaging are widely used to provide a basic framework in the evaluation and management of cardiomyopathies. Echocardiography is the quintessential imaging technique owing to its unique ability to provide real-time images of the beating heart with good temporal resolution, combined with its noninvasive nature, cost-effectiveness, availability, and portability...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28910586/global-and-regional-cardiac-function-in-lifelong-endurance-athletes-with-and-without-myocardial-fibrosis
#11
Thijs M H Eijsvogels, David L Oxborough, Rory O'Hanlon, Sanjay Sharma, Sanjay Prasad, Greg Whyte, Keith P George, Mathew G Wilson
The aim of the present study was to compare cardiac structure as well as global and regional cardiac function in athletes with and without myocardial fibrosis (MF). Cardiac magnetic resonance imaging with late gadolinium enhancement was used to detect MF and global cardiac structure in nine lifelong veteran endurance athletes (58 ± 5 years, 43 ± 5 years of training). Transthoracic echocardiography using tissue-Doppler and myocardial strain imaging assessed global and regional (18 segments) longitudinal left ventricular function...
September 14, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28905655/inverted-takotsubo-syndrome-in-androctonus-australis-scorpion-envenomation
#12
Fekri Abroug, Islem Ouanes, Mezri Maatouk, Mondher Golli, Lamia Ouanes-Besbes
CONTEXT: The nature of scorpion-related cardiomyopathy is still a matter of debate where specific toxin-induced cardiomyopathy, ischemic, or catecholaminergic cardiomyopathy is advocated as well. We report two cases of Takotsubo syndrome following envenomation by Androctonus australis, bringing new evidence for the fundamental role of catecholamines in the pathogenesis of this cardiomyopathy. Case 1: A woman aged 36 presented with pulmonary edema and shock following scorpion envenomation...
September 14, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28905233/gated-thoracic-magnetic-resonance-angiography-at-3t-noncontrast-versus-blood-pool-contrast
#13
Chengcheng Zhu, Henrik Haraldsson, Kimberly Kallianos, Liang Ge, Elaine Tseng, Travis Henry, David Saloner, Michael D Hope
Both noncontrast and contrast-enhanced approaches to gated thoracic magnetic resonance angiography (MRA) for aortic root evaluation have been reported at 3T. We compare qualitative and quantitative image quality measures for the two approaches, and assess the reproducibility of standard aortic measurements. Respiratory and cardiac gated MRA of the chest was performed at 3T in 45 patients: 23 after administration of iron-based blood pool contrast, and 22 without contrast. Image quality was assessed with a 5-point Likert scale, vessel lumen-to-muscle contrast ratios, and vessel wall sharpness...
September 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28903760/feasibility-of-detecting-myocardial-infarction-in-the-sheep-fetus-using-late-gadolinium-enhancement-cmr-imaging
#14
An Qi Duan, Mitchell C Lock, Sunthara Rajan Perumal, Jack R Darby, Jia Yin Soo, Joseph B Selvanayagam, Christopher K Macgowan, Mike Seed, Janna L Morrison
BACKGROUND: Late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) imaging has enabled the accurate assessment of myocardial infarction (MI). However, LGE CMR has not been performed successfully in the fetus, where it could be useful for animal studies of interventions to promote cardiac regeneration. We believe that LGE imaging could allow us to document the presence, extent and effect of MI in utero and would thereby expand our capacity for conducting fetal sheep MI research...
September 13, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28900462/comparison-of-the-therapeutic-effects-of-acupuncture-at-pc6-and-st36-for-chronic-myocardial-ischemia
#15
Li Shi, Jiliang Fang, Jiping Zhao, Guiyong Liu, Qing Zhao, Jinling Zhang, Jinzhao Zhang, Bing Zhu, Fanrong Liang, Peijing Rong
We aimed to compare the differences of the effects on chronic myocardial ischemia (MI) of acupuncture at PC6 and ST36. The chronic MI model of minipigs was created by implanting an Ameroid constrictor on the left anterior descending coronary artery (LAD) and then two weeks' acupuncture was stimulated at PC6 or ST36, respectively. The results showed that both acupoints' stimulation decreased the serous cardiac troponin T (cTnT) and ischemia modified albumin (IMA) significantly and improved the ischemic ECG changes...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28899950/prevalence-and-prognostic-significance-of-left-ventricular-noncompaction-in-patients-referred-for-cardiac-magnetic-resonance-imaging
#16
Alexander Ivanov, Devindra S Dabiesingh, Geetha P Bhumireddy, Ambreen Mohamed, Ahmed Asfour, William M Briggs, Jean Ho, Saadat A Khan, Alexandra Grossman, Igor Klem, Terrence J Sacchi, John F Heitner
BACKGROUND: Presence of prominent left ventricular trabeculation satisfying criteria for left ventricular noncompaction (LVNC) on routine cardiac magnetic resonance examination is frequently encountered; however, the clinical and prognostic significance of these findings remain elusive. This registry aimed to assess LVNC prevalence by 4 current criteria and to prospectively evaluate an association between diagnosis of LVNC by these criteria and adverse events. METHODS AND RESULTS: There were 700 patients referred for cardiac magnetic resonance: 42% were women, median age was 70 years (range, 45-71 years), mean left ventricular ejection fraction was 51% (±17%), and 32% had late gadolinium enhancement on cardiac magnetic resonance...
September 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28894592/changes-in-delta-adc-reflect-intracranial-pressure-changes-in-craniosynostosis
#17
Yuko Takahashi, Masaaki Hori, Kazuaki Shimoji, Masakazu Miyajima, Osamu Akiyama, Hajime Arai, Shigeki Aoki
BACKGROUND: In patients with craniosynostosis, intracranial pressure (ICP) has been reported to increase even in the absence of overt symptoms. The early and non-invasive detection of intracranial hypertension is important for reducing the risk of abnormal brain development in pediatric patients. PURPOSE: To assess whether the apparent diffusion coefficient (ADC) of white matter during the cardiac cycle (ΔADC) would change after surgery to relieve ICP in children with craniosynostosis...
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28894472/effective-heart-disease-detection-based-on-quantitative-computerized-traditional-chinese-medicine-using-representation-based-classifiers
#18
Ting Shu, Bob Zhang, Yuan Yan Tang
At present, heart disease is the number one cause of death worldwide. Traditionally, heart disease is commonly detected using blood tests, electrocardiogram, cardiac computerized tomography scan, cardiac magnetic resonance imaging, and so on. However, these traditional diagnostic methods are time consuming and/or invasive. In this paper, we propose an effective noninvasive computerized method based on facial images to quantitatively detect heart disease. Specifically, facial key block color features are extracted from facial images and analyzed using the Probabilistic Collaborative Representation Based Classifier...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28892806/a-novel-missense-gla-mutation-p-g35v-detected-in-hemodialysis-screening-leads-to-severe-systemic-manifestations-of-fabry-disease-in-men-and-women
#19
Valeria Soares Pigozzi Veloso, Thiago Lacerda Ataides, Maria Eugênia Fernandes Canziani, Mariana Pigozzi Veloso, Nilzio Antônio da Silva, Daniela Veit Barreto, Edna Regina Silva Pereira, Luiz Antonio Ribeiro de Moura, Fellype Carvalho Barreto
BACKGROUND/AIMS: Fabry disease (FD), an X-linked lysosomal storage disorder, leads to accumulation of globotriaosylceramide. Screening in dialysis patients may identify genetic variants of unknown clinical significance. We aimed to characterize the pathogenicity of a novel GLA gene mutation identified during hemodialysis screening and the histologic findings of early Fabry nephropathy. METHODS: One out of 108 male hemodialysis patients screened for FD presented low α-galactosidase A activity...
September 12, 2017: Nephron
https://www.readbyqxmd.com/read/28888275/mean-arterial-pressure-of-65-mm-hg-versus-85-100-mm-hg-in-comatose-survivors-after-cardiac-arrest-rationale-and-study-design-of-the-neuroprotect-post-cardiac-arrest-trial
#20
Koen Ameloot, Cathy De Deyne, Bert Ferdinande, Matthias Dupont, Pieter-Jan Palmers, Thibault Petit, Ward Eertmans, Clara Moonen, Ann Belmans, Robin Lemmens, Joseph Dens, Stefan Janssens
BACKGROUND: Post-cardiac arrest (CA) patients admitted to the intensive care unit (ICU) have a poor prognosis, with estimated survival rates of around 30%-50%. On admission, these patients have a large cerebral penumbra at risk for additional damage in case of suboptimal brain oxygenation during their stay in the ICU. The aim of the Neuroprotect post-CA trial is to investigate whether forcing mean arterial blood pressure (MAP) and mixed venous oxygen saturation (SVO2) in a specific range (MAP 85-100 mm Hg, SVO2 65%-75%) with additional pharmacological support (goal-directed hemodynamic optimization) may better salvage the penumbra, reduce cerebral ischemia, and improve functional outcome when compared with current standard of care (MAP 65 mm Hg)...
September 2017: American Heart Journal
keyword
keyword
1615
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"