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https://www.readbyqxmd.com/read/29149455/positive-effect-on-patient-experience-of-video-information-given-prior-to-cardiovascular-magnetic-resonance-imaging-a-clinical-trial
#1
Britt-Marie Ahlander, Jan Engvall, Eva Maret, Elisabeth Ericsson
AIMS: To evaluate the effect of video information given before cardiovascular magnetic resonance imaging on patient anxiety and to compare patient experiences of cardiovascular magnetic resonance imaging versus myocardial perfusion scintigraphy. To evaluate if additional information has an impact on motion artefacts. BACKGROUND: Cardiovascular magnetic resonance imaging and myocardial perfusion scintigraphy are technically advanced methods for the evaluation of heart diseases...
November 17, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/29148628/clinical-significance-of-st-depression-at-exercise-stress-testing-in-competitive-athletes-usefulness-of-coronary-ct-during-screening
#2
Fabio Sperandii, Emanuele Guerra, Eliana Tranchita, Carlo Minganti, Chiara Lanzillo, Antonia Nigro, Federico Quaranta, Attilio Parisi, Mauro DI Roma, Luciano Maresca, Federica Fagnani, Leonardo Calò
BACKGROUND: Congenital coronary anomalies (CCAs) and coronary artery disease (CAD) arouse intense scientific and clinical interest in sports medicine and sports cardiology medical communities because of their potential to trigger sudden cardiac death (SCD) in athletes. Exercise stress testing represent the first instrumental assessment to evaluate electrocardiographic changes during effort. Coronary computed tomography angiography (CCTA) is an advanced accurate noninvasive imaging modality for excluding CAD and abnormalities of origin and course of coronary vessels...
November 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29148586/a-dynamic-ultrasound-simulation-of-a-pulsating-three-layered-cca-for-validation-of-2d-wall-motion-and-blood-velocity-estimation-algorithms
#3
Xiao Hu, Yufeng Zhang, Guanghui Cai, Kexin Zhang, Li Deng, Lian Gao, Suya Han, Jianhua Chen
PURPOSE: A dynamic ultrasound simulation model for the common carotid artery (CCA) with three arterial layers for validation of 2D wall motion and blood velocity estimation algorithms is proposed in present study. This model describes layers with not only characteristics of echo distributions conforming to clinical ones, but also varying thicknesses, axial and radial displacements with pulsatile blood pressure during a cardiac cycle. METHODS: The modeling process is as follows: first, a geometrical model according with the clinical structure size of a CCA is built based on the preset layer thicknesses and the diameter of lumen...
November 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/29148430/low-dose-4d-cardiac-imaging-in-small-animals-using-dual-source-micro-ct
#4
Matthew Holbrook, Darin P Clark, Cristian T Badea
Micro-CT is widely used in preclinical studies, generating substantial interest in extending its capabilities in functional imaging applications such as blood perfusion and cardiac function. However, imaging cardiac structure and function in mice is challenging due to their small size and rapid heart rate. To overcome these challenges, we propose and compare improvements on two strategies for cardiac gating in dual-source, preclinical micro-CT: fast prospective gating (PG) and uncorrelated retrospective gating (RG)...
November 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29147835/automatic-localization-of-the-left-ventricular-blood-pool-centroid-in-short-axis-cardiac-cine-mr-images
#5
Li Kuo Tan, Yih Miin Liew, Einly Lim, Yang Faridah Abdul Aziz, Kok Han Chee, Robert A McLaughlin
In this paper, we develop and validate an open source, fully automatic algorithm to localize the left ventricular (LV) blood pool centroid in short axis cardiac cine MR images, enabling follow-on automated LV segmentation algorithms. The algorithm comprises four steps: (i) quantify motion to determine an initial region of interest surrounding the heart, (ii) identify potential 2D objects of interest using an intensity-based segmentation, (iii) assess contraction/expansion, circularity, and proximity to lung tissue to score all objects of interest in terms of their likelihood of constituting part of the LV, and (iv) aggregate the objects into connected groups and construct the final LV blood pool volume and centroid...
November 17, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29147830/asymptomatic-adult-intrapericardial-diaphragmatic-hernia-detected-on-cardiac-spect-ct
#6
Muhammad Yasir Adeel, Saad Sikanderkhel, Zartashia Shahab, Isabel Oliva, Jaime Gerber
An 83-year-old man underwent exercise stress test with single photon emission computed tomography (SPECT) myocardial perfusion imaging for new electrocardiogram (EKG) changes. The stress EKG did not show any significant changes. Myocardial perfusion imaging with SPECT demonstrated an inferior wall defect and extracardiac uptake of nuclear tracer. Simultaneous cardiac computed tomography performed for attenuation correction showed presence of intrapericardial hepatic tissue in an anterior diaphragmatic hernia...
November 16, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29147768/non-invasive-methods-for-estimating-mpap-in-copd-using-cardiovascular-magnetic-resonance-imaging
#7
C S Johns, S Rajaram, D A Capener, C Oram, C Elliot, R Condliffe, D G Kiely, J M Wild, A J Swift
PURPOSE: Pulmonary hypertension (PH) is associated with a poor outcome in chronic obstructive pulmonary disease (COPD) and is diagnosed invasively. We aimed to assess the diagnostic accuracy and prognostic value of non-invasive cardiovascular magnetic resonance (CMR) models. METHODS: Patients with COPD and suspected PH, who underwent CMR and right heart catheter (RHC) were identified. Three candidate models were assessed: 1, CMR-RV model, based on right ventricular (RV) mass and interventricular septal angle; 2, CMR PA/RV includes RV mass, septal angle and pulmonary artery (PA) measurements; 3, the Alpha index, based on RV ejection fraction and PA size...
November 16, 2017: European Radiology
https://www.readbyqxmd.com/read/29146749/statins-promote-cardiac-infarct-healing-by-modulating-endothelial-barrier-function-revealed-by-contrast-enhanced-magnetic-resonance-imaging
#8
Geert J Leenders, Mirjam B Smeets, Maaike van den Boomen, Monique Berben, Miranda Nabben, Dianne van Strijp, Gustav J Strijkers, Jeanine J Prompers, Fatih Arslan, Klaas Nicolay, Katrien Vandoorne
OBJECTIVE: The endothelium has a crucial role in wound healing, acting as a barrier to control transit of leukocytes. Endothelial barrier function is impaired in atherosclerosis preceding myocardial infarction (MI). Besides lowering lipids, statins modulate endothelial function. Here, we noninvasively tested whether statins affect permeability at the inflammatory (day 3) and the reparative (day 7) phase of infarct healing post-MI using contrast-enhanced cardiac magnetic resonance imaging...
November 16, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29146416/fulminant-adrenergic-myocarditis-complicated-by-pulmonary-edema-cardiogenic-shock-and-cardiac-arrest
#9
Pawel Rostoff, Bohdan Nessler, Patrycja Pikul, Karolina Golinska-Grzybala, Tomasz Miszalski-Jamka, Jadwiga Nessler
Adrenergic myocarditis is an uncommon presentation of pheochromocytoma and extremely rare cause of de novo acute heart failure (AHF). We present a case of a 31-year-old Caucasian woman with a history of hypertension and recurrent occipital headaches who was admitted to the emergency department due to severe de novo AHF presenting as pulmonary edema and cardiogenic shock. During the hospital admission the patient experienced asystolic cardiac arrest and was successfully resuscitated, intubated, and mechanically ventilated...
November 10, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29145950/a-combination-of-allogeneic-stem-cells-promotes-cardiac-regeneration
#10
Makoto Natsumeda, Victoria Florea, Angela C Rieger, Bryon A Tompkins, Monisha N Banerjee, Samuel Golpanian, Julia Fritsch, Ana Marie Landin, Nilesh D Kashikar, Vasileios Karantalis, Viky Y Loescher, Kostas E Hatzistergos, Luiza Bagno, Cristina Sanina, Muzammil Mushtaq, Jose Rodriguez, Marcos Rosado, Ariel Wolf, Kevin Collon, Louis Vincent, Anthony J Kanelidis, Ivonne H Schulman, Raul Mitrani, Alan W Heldman, Wayne Balkan, Joshua M Hare
BACKGROUND: The combination of autologous mesenchymal stem cells (MSCs) and cardiac stem cells (CSCs) synergistically reduces scar size and improves cardiac function in ischemic cardiomyopathy. Whereas allogeneic (allo-)MSCs are immunoevasive, the capacity of CSCs to similarly elude the immune system remains controversial, potentially limiting the success of allogeneic cell combination therapy (ACCT). OBJECTIVES: This study sought to test the hypothesis that ACCT synergistically promotes cardiac regeneration without provoking immunologic reactions...
November 14, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29145895/comparative-analysis-of-high-sensitivity-cardiac-troponin-i-and-t-for-their-association-with-coronary-computed-tomography-assessed-calcium-scoring-represented-by-the-agatston-score
#11
Jonas Rusnak, Michael Behnes, Thomas Henzler, Nadine Reckord, Nils Vogler, Mathias Meyer, Ursula Hoffmann, Michele Natale, Julia Hoffmann, Sonja Hamed, Kathrin Weidner, Siegfried Lang, Agnibh Mukherji, Holger Haubenreisser, Stefan O Schoenberg, Martin Borggrefe, Thomas Bertsch, Ibrahim Akin
BACKGROUND: This study evaluates the association between high-sensitivity cardiac troponin I (hs-cTnI) and T (hs-cTnT) and coronary calcium concentration (CAC) detected by coronary computed tomography (CCT) and evaluated with the Agatston score in patients with suspected coronary artery disease (CAD). METHODS: Patients undergoing CCT during routine clinical care were enrolled prospectively. CCT was indicated for patients with a low to intermediate pretest probability for CAD...
November 16, 2017: European Journal of Medical Research
https://www.readbyqxmd.com/read/29145881/multiple-small-hemorrhagic-infarcts-in-cerebral-air-embolism-a-case-report
#12
Masaya Togo, Taku Hoshi, Ryosuke Matsuoka, Yukihiro Imai, Nobuo Kohara
BACKGROUND: Cerebral air embolism is a rare cause of cerebral infarction. In cerebral air embolism, T2 star-weighted imaging shows numerous spotty hypointense signals. Previous reports have suggested that these signals represent air in the brain and are gradually diminished and absorbed. We experienced two cases of cerebral air embolism, and in one of them, we conducted an autopsy. CASE PRESENTATION: Case 1 was a 76-year-old Japanese man with lung cancer and emphysema...
November 16, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29145478/electrical-impedance-tomography-amplitudes-of-cardiac-related-impedance-changes-in-the-lung-are-highly-position-dependent
#13
Michael Graf, Thomas Riedel
BACKGROUND: Electrical impedance tomography (EIT) is used on the thorax to measure impedance changes due to the presence of air and blood in the lung. This experimental study was performed to investigate the effect of posture on cardiac and respiratory related impedance changes. METHODS: EIT measurements were performed on 14 healthy subjects in left-, right lateral, prone, supine and upright positions. Simultaneously, tidal volume was recorded with an ultrasonic flowmeter...
2017: PloS One
https://www.readbyqxmd.com/read/29145264/influences-of-cardiac-motion-on-computed-tomography-guided-biopsy-of-lung-nodules-located-near-the-heart
#14
Li-Sheng Hsu, Chien-Wei Chen, Chia-Hao Chang, Chien-Han Liao, Sheng-Lung Hsu, Wei-Ming Lin
Computed tomography (CT)-guided lung biopsy of nodules located near the heart may be associated with potential complications. To understand the influences of cardiac motion on lung parenchyma during biopsy, we processed the cardiac phase images of coronary CT angiography (CCTA) and noticed shifts in mediastinum lung margin (MLM) at different zones.Thirty eight CCTA (27 men and 11 women) were retrospectively evaluated. Image processing was done with Fiji (an open source Java image processing program by Fiji contributors) using 10% to 90% phase images of CCTA; and tissue displacement (MLM shift) was shown on the resulting images...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29143170/circumferential-strain-acquired-by-cmr-early-after-acute-myocardial-infarction-adds-incremental-predictive-value-to-late-gadolinium-enhancement-imaging-to-predict-late-myocardial-remodeling-and-subsequent-risk-of-sudden-cardiac-death
#15
Anthony A Holmes, Jorge Romero, Jeffrey M Levsky, Linda B Haramati, Newton Phuong, Leila Rezai-Gharai, Stuart Cohen, Lina Restrepo, Luis Ruiz-Guerrero, John D Fisher, Cynthia C Taub, Luigi Di Biase, Mario J Garcia
PURPOSE: Late adverse myocardial remodeling after acute myocardial infarction (AMI) is strongly associated with sudden cardiac death (SCD). Cardiac magnetic resonance (CMR) performed early after AMI can predict late remodeling and SCD risk with moderate accuracy. This study assessed the ability of CMR-measured circumferential strain (CS) to add incremental predictive information to late gadolinium enhancement (LGE). METHODS: Patients with an AMI and LVEF < 50% were screened for inclusion...
November 15, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29142818/shortness-of-breath-on-exertion-a-cardiac-magnetic-resonance-picture-is-worth-a-thousand-words
#16
Chrysanthos Grigoratos, Andrea Barison, Giancarlo Todiere, Giovanni Donato Aquaro
This is the case of a 78-year-old male patient that underwent a cardiac magnetic resonance (CMR) due to shortness of breath. An unanticipated diagnosis of a giant pseudoaneurysm with a "guitar-like" appearance was made and patient was sent for urgent ventriculoplasty. CMR offered striking illustrative images allowing for previously unsuspected diagnosis to be made and patient's therapeutic management modified. Moreover, in this case, we emphasize the paramount importance of differentiating between true aneurysms, pseudoaneurysms, clefts, and diverticuli since each pathology has completely different management and prognosis that vary from benign to potentially fatal if not immediately treated...
October 2017: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/29142812/left-ventricle-relative-apical-sparing-in-cardiac-amyloidosis
#17
Marianna Nardozza, Elisabetta Chiodi, Donato Mele
Amyloidosis is a disease characterized by the extracellular deposition of the protein amyloid. It is a multiorgan disease, and cardiac involvement is not uncommon, generally in the form of a restrictive cardiomyopathy. Typical aspects of cardiac amyloidosis have been described at echocardiography and magnetic resonance imaging (MRI). In particular, the relative apical sparing at two-dimensional speckle-tracking echocardiography has been reported to be specific for cardiac amyloidosis. In our case, we report for the first time that this echocardiographic sign is related to lack of hyperenhancement at late gadolinium enhancement imaging in cardiac MRI...
October 2017: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/29142369/utility-of-18-f-fluorodeoxyglucose-positron-emission-tomography-magnetic-resonance-imaging-in-the-diagnosis-of-cardiac-paraganglioma
#18
Nicholas Bhojwani, Jennifer Huang, Vasant Garg, Michael Yang, Guilherme H Oliveira, Prabhakar Rajiah
Cardiac paragangliomas are rare tumors of neural crest origin, most frequently seen in the left atrium. There are mixed opinions regarding the most appropriate imaging study for diagnosis and evaluation. We describe the novel utility of 18-F-Fluorodeoxyglucose positron emission tomography/magnetic resonance imaging in the case of a 42-year-old male with cardiac paraganglioma.
October 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/29140981/wavelet-brain-angiography-suggests-arteriovenous-pulse-wave-phase-locking
#19
William E Butler
When a stroke volume of arterial blood arrives to the brain, the total blood volume in the bony cranium must remain constant as the proportions of arterial and venous blood vary, and by the end of the cardiac cycle an equivalent volume of venous blood must have been ejected. I hypothesize the brain to support this process by an extraluminally mediated exchange of information between its arterial and venous circulations. To test this I introduce wavelet angiography methods to resolve single moving vascular pulse waves (PWs) in the brain while simultaneously measuring brain pulse motion...
2017: PloS One
https://www.readbyqxmd.com/read/29139034/vessel-centerline-reconstruction-from-non-isocentric-and-non-orthogonal-paired-monoplane-angiographic-images
#20
Mie Kunio, Caroline C O'Brien, Augusto C Lopes, Lynn Bailey, Pedro A Lemos, Guillermo J Tearney, Elazer R Edelman
PURPOSE: Three-dimensional reconstruction of a vessel centerline from paired planar coronary angiographic images is critical to reconstruct the complex three-dimensional structure of the coronary artery lumen and the relative positioning of implanted devices. In this study, a new vessel centerline reconstruction method that can utilize non-isocentric and non-orthogonal pairs of angiographic images was developed and tested. METHODS: Our new method was developed in in vitro phantom models of bifurcated coronary artery with and without stent, and then tested in in vivo swine models (twelve coronary arteries)...
November 14, 2017: International Journal of Cardiovascular Imaging
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