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Cardiac ultrasound

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https://www.readbyqxmd.com/read/28109936/precision-phenotyping-in-heart-failure-and-pattern-clustering-of-ultrasound-data-for-the-assessment-of-diastolic-dysfunction
#1
Alaa Mabrouk Salem Omar, Sukrit Narula, Mohamed Ahmed Abdel Rahman, Gianni Pedrizzetti, Hala Raslan, Osama Rifaie, Jagat Narula, Partho P Sengupta
OBJECTIVES: The aim of this study was to investigate whether cluster analysis of left atrial and left ventricular (LV) mechanical deformation parameters provide sufficient information for Doppler-independent assessment of LV diastolic function. BACKGROUND: Medical imaging produces substantial phenotyping data, and superior computational analyses could allow automated classification of repetitive patterns into patient groups with similar behavior. METHODS: The authors performed a cluster analysis and developed a model of LV diastolic function from an initial exploratory cohort of 130 patients that was subsequently tested in a prospective cohort of 44 patients undergoing cardiac catheterization...
January 11, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28104551/a-framework-for-analysis-of-linear-ultrasound-videos-to-detect-fetal-presentation-and-heartbeat
#2
M A Maraci, C P Bridge, R Napolitano, A Papageorghiou, J A Noble
Confirmation of pregnancy viability (presence of fetal cardiac activity) and diagnosis of fetal presentation (head or buttock in the maternal pelvis) are the first essential components of ultrasound assessment in obstetrics. The former is useful in assessing the presence of an on-going pregnancy and the latter is essential for labour management. We propose an automated framework for detection of fetal presentation and heartbeat from a predefined free-hand ultrasound sweep of the maternal abdomen. Our method exploits the presence of key anatomical sonographic image patterns in carefully designed scanning protocols to develop, for the first time, an automated framework allowing novice sonographers to detect fetal breech presentation and heartbeat from an ultrasound sweep...
January 10, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28097523/intravascular-ultrasound-characterization-of-a-tissue-engineered-vascular-graft-in-an-ovine-model
#3
Victoria K Pepper, Elizabeth S Clark, Cameron A Best, Ekene A Onwuka, Tadahisa Sugiura, Eric D Heuer, Lilamarie E Moko, Shinka Miyamoto, Hideki Miyachi, Darren P Berman, Sharon L Cheatham, Joanne L Chisolm, Toshiharu Shinoka, Christopher K Breuer, John P Cheatham
Patients who undergo implantation of a tissue-engineered vascular graft (TEVG) for congenital cardiac anomalies are monitored with echocardiography, followed by magnetic resonance imaging or angiography when indicated. While these methods provide data regarding the lumen, minimal information regarding neotissue formation is obtained. Intravascular ultrasound (IVUS) has previously been used in a variety of conditions to evaluate the vessel wall. The purpose of this study was to evaluate the utility of IVUS for evaluation of TEVGs in our ovine model...
January 17, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/28097187/intraoperative-epiaortic-ultrasound-for-traumatic-pseudoaneurysm-of-the-ascending-aorta
#4
Michelle Eddins, Marco Aguirre, Jonathan Price, Michael Wait, Pietro Bajona
Epiaortic ultrasound is an imaging modality that is commonly used to evaluate the ascending aorta for atheroma and other mural lesions during elective cardiac surgery. Its use in contained aortic rupture has not been established. We present a case of thoracic trauma with contained pseudoaneurysm of the ascending aorta. At operation, the precise location of the aortic tear could not be identified by visual inspection, manual palpation, or transesophageal echocardiography. Epiaortic ultrasound was employed and the aortic defect was identified and successfully repaired...
June 2016: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/28092783/pulmonary-emboli-cardiac-arrest-with-cpr-complication-liver-laceration-and-massive-abdominal-bleed-a-case-report
#5
John Lundqvist, Jan G Jakobsson
INTRODUCTION: Massive pulmonary emboli may cause right ventricular failure and backward stasis with parenchymal organ swelling thus increasing the risk for laceration, e.g. if CPR is needed. PRESENTATION OF CASE: A 28-year-old Colombian female with no medical history but taking contraceptive pills and having had a recent longer flight was admitted to Danderyds hospital Emergency Department because of respiratory failure. She developed cardiac arrest in the emergence department following the emergent diagnosis of pulmonary emboli...
January 3, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28092530/feasibility-of-multi-plane-transmit-beamforming-for-real-time-volumetric-cardiac-imaging-a-simulation-study
#6
Yinran Chen, Ling Tong, Alejandra Ortega, Jianwen Luo, Jan D'hooge
Today's three-dimensional (3-D) cardiac ultrasound imaging systems suffer from relatively low spatial and temporal resolution, limiting their applicability in daily clinical practice. To address this problem, 3-D diverging wave imaging with spatial coherent compounding (DWC) as well as 3-D multi-line-transmit (MLT) imaging have recently been proposed. Currently, the former improves the temporal resolution significantly at the expense of image quality and the risk of introducing motion artifacts whereas the latter only provides a moderate gain in volume rate but mostly preserves quality...
January 10, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28079767/primary-gastric-choriocarcinoma-presenting-as-a-pregnancy-of-unknown-location
#7
Alyssa Larish, Amanika Kumar, Sarah Kerr, Carrie Langstraat
BACKGROUND: Pregnancy of unknown location presents a diagnostic challenge, in rare occasions leading to the diagnosis of malignancy. We describe a case of β-hCG-secreting nongestational primary gastric choriocarcinoma presenting as a pregnancy of unknown location. CASE: A 37-year-old woman, gravida 4 para 3013, presented with several days of vaginal bleeding and rising β-hCG level without ultrasound localization of pregnancy. The diagnosis of pregnancy of unknown location was made and methotrexate administered at a β-hCG level of 7,779 milli-international units/mL...
January 9, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28076990/outcomes-in-the-absence-of-the-ductus-venosus-diagnosed-in-the-first-trimester
#8
Hiroko Takita, Junichi Hasegawa, Tatsuya Arakaki, Shoko Hamada, Mayumi Tokunaka, Masamitsu Nakamura, Ryu Matsuoka, Akihiko Sekizawa
PURPOSE: To clarify the outcomes of the absence of the ductus venosus diagnosed in fetuses suspected to have a structural abnormality during a morphological assessment in the first trimester. METHODS: Infants in whom ultrasound fetal morphological assessments were attempted in the first trimester (11 to 13-6 weeks of gestation) and who were subsequently delivered between 2013 and 2015 at Showa University Hospital were enrolled. In cases in which the absence of the ductus venosus was diagnosed in the first trimester, the prognosis was assessed...
January 11, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28076337/coded-excitation-for-diverging-wave-cardiac-imaging-a-feasibility-study
#9
Feifei Zhao, Ling Tong, Qiong He, Jianwen Luo
Diverging wave (DW) based cardiac imaging has gained increasing interest in recent years given its capacity to achieve ultrahigh frame rate. However, the signal-to-noise ratio (SNR), contrast, and penetration depth of the resulting B-mode images are typically low as DWs spread energy over a large region. Coded excitation is known to be capable of increasing the SNR and penetration for ultrasound imaging. The aim of this study was therefore to test the feasibility of applying coded excitation in DW imaging to improve the corresponding SNR, contrast and penetration depth...
January 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28073593/integrative-cardiopulmonary-ultrasound-for-interstitial-lung-disease-assessment-correlation-between-lung-ultrasound-performance-and-cardiac-involvement
#10
Wei-Wei Zhu, Yi-Dan Li, Hong Li, Xiu-Zhang Lu, Ling-Yun Kong, Xiao-Guang Ye, Qi-Zhe Cai, Lan-Lan Sun, Wei Jiang, Li Wang
The aims of this study were to apply integrative cardiopulmonary ultrasound (thoracic ultrasound) to the evaluation of patients with interstitial lung disease (ILD) and to determine the relationship between lung ultrasound signs and echocardiographic parameters such as systolic pulmonary artery pressure (SPAP) and various right ventricular parameters. ILD patients and healthy controls underwent lung ultrasound (LUS) and echocardiographic tests. In addition to traditional echocardiographic parameters, right ventricular free wall longitudinal strain (RVLS_FW) was measured using 2-D speckle-tracking echocardiography...
January 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28072500/ultrasound-guided-intracardiac-xenotransfusion-of-canine-packed-red-blood-cells-and-epinephrine-to-the-left-ventricle-of-a-severely-anemic-cat-during-cardiopulmonary-resuscitation
#11
Liron Oron, Yaron Bruchim, Sigal Klainbart, Efrat Kelmer
OBJECTIVE: To describe the use of an ultrasound-guided intracardiac xenotransfusion of canine packed red blood cells (pRBC) to the left ventricle of a severely anemic cat during cardiopulmonary resuscitation (CPR). CASE SUMMARY: An 8-year-old previously healthy neutered female cat was presented with severe weakness after she had disappeared for 1 month. On presentation, the cat was in hypovolemic shock, laterally recumbent, and severely anemic with massive flea infestation...
January 10, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28072471/the-negative-chronotropic-effect-in-rat-heart-stimulated-by-ultrasonic-pulses-role-of-sex-and-age
#12
Olivia C Coiado, William D O'Brien
OBJECTIVES: The goal of this study is to investigate the role of sex and age of the negative chronotropic effect after exposure of 3.5-MHz pulsed ultrasound (US) to the rat heart. METHODS: Forty F344 rats were exposed transthoracically to ultrasonic pulses at a duty factor of approximately 1.0% at 2.0-MPa peak rarefactional pressure amplitude. The transthoracic ultrasonic bursts were delivered consecutively in five 10-s intervals, that is, 10 s of 6-Hz pulse repetition frequency (PRF), 10 s of 5-Hz PRF, 10 s of 4-Hz PRF, 10 s of 5-Hz PRF, and 10 s of 6-Hz, for a 50-s total exposure duration...
January 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28069611/bioresorbable-vascular-scaffolds-for-the-treatment-of-chronic-total-occlusions-an-international-multicenter-registry
#13
Satoru Mitomo, Toru Naganuma, Yusuke Fujino, Hiroyoshi Kawamoto, Sandeep Basavarajaiah, Michael Pitt, Wei-Hsian Yin, Damras Tresukosol, Antonio Colombo, Sunao Nakamura
BACKGROUND: There are only limited studies reporting clinical outcomes after bioresorbable vascular scaffold (BVS; Absorb; Abbott Vascular, Santa Clara, CA) implantation for coronary chronic total occlusions (CTO). The aim of this study was to evaluate the real-world feasibility and safety of BVS implantation for the treatment of CTO. METHODS AND RESULTS: We retrospectively evaluated CTO cases treated with BVS from a multicenter registry. The primary end point was target lesion failure defined as a composite of cardiac death, target vessel myocardial infarction, and clinically driven target lesion revascularization...
January 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28067629/standardized-echocardiographic-assessment-of-cardiac-function-in-normal-adult-zebrafish-and-heart-disease-models
#14
Louis W Wang, Inken G Huttner, Celine F Santiago, Scott H Kesteven, Ze-Yan Yu, Michael P Feneley, Diane Fatkin
The zebrafish (Danio rerio) is an increasingly popular model organism in cardiovascular research. Major insights into cardiac developmental processes have been gained by studies of embryonic zebrafish. However, the utility of zebrafish for modeling adult-onset heart disease has been limited by a lack of robust methods for in vivo evaluation of cardiac function. We established a physiological protocol for underwater zebrafish echocardiography using high frequency ultrasound, and evaluated its reliability in detecting altered cardiac function in two disease models...
January 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28066904/implementing-point-of-care-ultrasonography-of-the-heart-and-lungs-in-an-anesthesia-department
#15
M T Bøtker, M L Vang, T Grøfte, H Kirkegaard, C A Frederiksen, E Sloth
BACKGROUND: Implementation of point-of-care ultrasonography (POCUS) of the heart and lungs requires image acquisition skills among providers. We aimed to determine the effect of POCUS implementation using a systematic education program on image acquisition skills and subsequent use and barriers in a department of anesthesiology. METHODS: Twenty-five anesthesiologists underwent a systematic education program in POCUS during the fall of 2012. A POCUS expert evaluated images from baseline and evaluation examinations performed on two healthy individuals as useful or not useful for clinical interpretation...
February 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28065933/non-contact-hemodynamic-imaging-reveals-the-jugular-venous-pulse-waveform
#16
Robert Amelard, Richard L Hughson, Danielle K Greaves, Kaylen J Pfisterer, Jason Leung, David A Clausi, Alexander Wong
Cardiovascular monitoring is important to prevent diseases from progressing. The jugular venous pulse (JVP) waveform offers important clinical information about cardiac health, but is not routinely examined due to its invasive catheterisation procedure. Here, we demonstrate for the first time that the JVP can be consistently observed in a non-contact manner using a photoplethysmographic imaging system. The observed jugular waveform was strongly negatively correlated to the arterial waveform (r = -0.73 ± 0...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28065540/cardiac-shear-wave-velocity-detection-in-the-porcine-heart
#17
Hendrik J Vos, Bas M van Dalen, Ilkka Heinonen, Johan G Bosch, Oana Sorop, Dirk J Duncker, Antonius F W van der Steen, Nico de Jong
Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate echocardiography. The waves were captured with 4000 frames/s using a programmable commercial ultrasound machine. The wave pattern was extracted from the data through a local tissue velocity estimator based on one-lag autocorrelation...
January 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28063115/bedside-focused-cardiac-ultrasound-in-the-evaluation-of-systolic-dysfunction
#18
Elisa Maria Fiorelli, Francesco Casella, Daniela Torzillo, Chiara Cogliati
No abstract text is available yet for this article.
January 6, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28058788/re-lung-and-cardiac-ultrasound-for-hemodynamic-monitoring-of-patients-with-severe-pre-eclampsia-j-ambrozic-g-brzan-simenc-k-prokselj-n-tulz-m-cvijic-and-m-lucovnik-ultrasound-obstet-gynecol-2017-49-104-109
#19
https://www.readbyqxmd.com/read/28048023/tu-fg-brb-09-thermoacoustic-range-verification-with-perfect-co-registered-overlay-of-bragg-peak-onto-ultrasound-image
#20
S Patch, M Kireeff Covo, A Jackson, Y Qadadha, K Campbell, R Albright, P Bloemhard, A Donoghue, C Siero, T Gimpel, S Small, B Ninemire, M Johnson, L Phair
PURPOSE: The potential of particle therapy has not yet been fully realized due to inaccuracies in range verification. The purpose of this work was to correlate the Bragg peak location with target structure, by overlaying thermoacoustic localization of the Bragg peak onto an ultrasound image. METHODS: Pulsed delivery of 50 MeV protons was accomplished by a fast chopper installed between the ion source and the inflector of the 88″ cyclotron at Lawrence Berkeley National Lab...
June 2016: Medical Physics
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