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Tissue doppler imaging

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https://www.readbyqxmd.com/read/28638827/cardiovascular-autonomic-neuropathy-is-an-independent-risk-factor-for-left-ventricular-diastolic-dysfunction-in-patients-with-type-2-diabetes
#1
Jiewen Jin, Weimin Wang, Liangying Zhu, Tianwei Gu, Qing Niu, Ping Li, Yan Bi, Dalong Zhu
AIM: This study aimed to evaluate the association between cardiovascular autonomic neuropathy (CAN) and left ventricular diastolic dysfunction (LVDD) in type 2 diabetes patients. METHODS: 315 type 2 diabetes patients from inpatients of Drum Tower Hospital were included and classified into no CAN (NCAN), possible CAN (PCAN), and definite CAN (DCAN) based on cardiovascular autonomic reflex tests. The left ventricular diastolic function was assessed by tissue Doppler imaging echocardiography...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28638676/utilization-of-longitudinal-ultrasound-to-quantify-joint-soft-tissue-changes-in-a-mouse-model-of-posttraumatic-osteoarthritis
#2
Hao Xu, Echoe M Bouta, Ronald W Wood, Edward M Schwarz, Yongjun Wang, Lianping Xing
To assess the utility of longitudinal ultrasound (US) to quantify volumetric changes in joint soft tissues during the progression of posttraumatic osteoarthritis (PTOA) in mice, and validate the US results with histological findings. A longitudinal cohort of 3-month-old wild-type C57BL/6 male mice received the Hulth-Telhag surgical procedure on right knee to induce PTOA, and sham surgery on their left knee as control. US scans were performed on both knees before, 2, 4, 6, and 8 weeks post-surgery. Joint space volume and Power-Doppler (PD) volume were obtained from US images via Amira software...
2017: Bone Research
https://www.readbyqxmd.com/read/28636515/a-brief-period-of-intensive-cardiac-rehabilitation-improves-global-longitudinal-strain-and-diastolic-function-after-a-first-uncomplicated-myocardial-infarction
#3
Gabriella Malfatto, Miriam Revera, Giovanna Branzi, Francesca Ciambellotti, Alessia Giglio, Simonetta Blengino, Matteo Oldani, Camilla Facchini, Gianfranco Parati, Mario Facchini
Objectives In patients with abnormal left ventricular ejection fraction (LVEF) after acute myocardial infarction (AMI), cardiac rehabilitation with physical training prevents cardiac remodelling. To define the role of rehabilitation in the recovery of ventricular function in less severe cases, we studied its effects on more refined indexes of left ventricular function in uncomplicated, low-risk patients. Methods and results Fifty-five patients underwent percutaneous coronary revascularization after uncomplicated first AMI...
March 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28634807/differential-diagnosis-between-benign-and-malignant-soft-tissue-tumors-utilizing-ultrasound-parameters
#4
Takeshi Morii, Tomonori Kishino, Naoko Shimamori, Mitsue Motohashi, Hiroaki Ohnishi, Keita Honya, Takayuki Aoyagi, Takashi Tajima, Shoichi Ichimura
PURPOSE: Preoperative discrimination between benign and malignant soft tissue tumors is critical for the prevention of excess application of magnetic resonance imaging and biopsy as well as unplanned resection. Although ultrasound, including power Doppler imaging, is an easy, noninvasive, and cost-effective modality for screening soft tissue tumors, few studies have investigated reliable discrimination between benign and malignant soft tissue tumors. METHODS: To establish a modality for discrimination between benign and malignant soft tissue tumors using ultrasound, we extracted the significant risk factors for malignancy based on ultrasound information from 40 malignant and 56 benign pathologically diagnosed soft tissue tumors and established a scoring system based on these risk factors...
June 20, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28634733/dynamic-properties-of-human-tympanic-membrane-after-exposure-to-blast-waves
#5
Warren G Engles, Xuelin Wang, Rong Z Gan
Blast overpressure causes dynamic damage to middle ear components, and tympanic membrane (TM) rupture is the most frequent middle ear injury. However, it is unclear how the blast waves change mechanical properties of the TM and affect sound transmission through the ear. This paper reports the current study on dynamic properties of the TM after exposure to blast waves by using acoustic loading and laser Doppler vibrometry (LDV). The TM specimens were prepared from human temporal bones following exposures to blast overpressure...
June 20, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28622670/adaptive-clutter-demodulation-for-non-contrast-ultrasound-perfusion-imaging
#6
Jaime Tierney, Crystal Coolbaugh, Theodore Towse, Brett Byram
Conventional Doppler ultrasound is useful for visualizing fast blood flow in large resolvable vessels. However, frame rate and tissue clutter caused by movement of the patient or sonographer make visualizing slow flow with ultrasound difficult. Patient and sonographer motion causes spectral broadening of the clutter signal, which limits ultrasound's sensitivity to velocities greater than 5-10mm/s for typical clinical imaging frequencies. To address this, we propose a clutter filtering technique that may increase the sensitivity of Doppler measurements to at least as low as 0...
June 13, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28619691/a-mouse-model-of-antepartum-stillbirth
#7
Anum Rahman, Lindsay S Cahill, Yu-Qing Zhou, Johnathan Hoggarth, Monique Y Rennie, Mike Seed, Christopher K Macgowan, John C Kingdom, S Lee Adamson, John G Sled
BACKGROUND: Many stillbirths of normally-formed fetuses in the third trimester could be prevented via delivery if reliable means to anticipate this outcome existed. However, since the etiology of these stillbirths is often unexplained and, although the underlying mechanism is presumed to be hypoxia from "placental insufficiency", the placentas often appear normal on histopathologic examination. Gestational age is a risk factor for antepartum stillbirth, with a rapid rise in stillbirth rates after 40 weeks gestation...
June 12, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28616561/left-atrial-appendage-function-assessment-and-thrombus-identification
#8
Jacek Kurzawski, Agnieszka Janion-Sadowska, Marcin Sadowski
BACKGROUND: The diagnosis of thrombus in the left atrium in patients with persistent atrial fibrillation (AF) and may be inconsistent because of variability in thrombus morphology. In some cases it is challenging and requires unusual approach. New Doppler-derived methods might be helpful to identify such thrombi. We evaluated quantitative differences in mechanical function of the left atrial appendage (LAA) basal segments using tissue Doppler imaging (TDI)and speckle tracking echocardiography (STE) in patients with non-valvular AF with and without LAA thrombus and compared them with SR patients...
March 2017: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/28616541/accuracy-of-quantitative-echocardiographic-measures-of-right-ventricular-function-as-compared-to-cardiovascular-magnetic-resonance
#9
Christian R Hamilton-Craig, Kathy Stedman, Ryan Maxwell, Bonita Anderson, Tony Stanton, Jonathan Chan, Akira Yamada, Gregory M Scalia, Darryl J Burstow
BACKGROUND: Many echocardiographic parameters have been proposed to evaluate right ventricular (RV) systolic function. We comprehensively assessed a wide range of quantitative echocardiographic parameters in a single cohort compared with same-day cardiovascular magnetic resonance (CMR). METHODS AND RESULTS: 92 subjects were examined prospectively: Group 1 consisted of 46 healthy controls (21 males, 33.4 ± 11.4 years), Group 2 consisted of 46 patients (20 males, 38...
September 2016: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/28616089/severe-pulmonary-arterial-hypertension-associated-with-congenital-cardiac-shunts-evolution-under-specific-treatment
#10
R I Negoi, I Ghiorghiu, F Filipoiu, M Hostiuc, I Negoi, C Ginghina
Objective: The aim of this study was to compare the effects of Sildenafil, Bosentan and combined therapy in patients with congenital cardiac shunts associated pulmonary artery hypertension (CCS-PAH). Design: Prospective observational study (February 2011 - January 2014) with a historical control group (January 2009 - January 2011). Setting: "CC Iliescu" Institute for Emergency Cardiovascular Diseases of Bucharest, a tertiary university-affiliated center. Patients: All cases with CCS-PAH. Interventions: Specific vasodilatory therapy: Sildenafil, Bosentan or combined therapy...
April 2017: Journal of Medicine and Life
https://www.readbyqxmd.com/read/28615148/echocardiographic-assessments-of%C3%A2-longitudinal-left-ventricular-function-in%C3%A2-healthy-english-springer-spaniels
#11
D Dickson, R Shave, M Rishniw, M Patteson
OBJECTIVES: To establish reference intervals for echocardiographic measures of longitudinal left ventricular function in adult English Springer spaniel (ESS) dogs. ANIMALS: This study involved 42 healthy adult ESS. METHODS: Animals were prospectively recruited from a general practice population in the United Kingdom. Dogs were examined twice, at least 12 months apart, to exclude dogs with progressive cardiac disease. Mitral annular plane systolic excursion, tissue Doppler imaging mitral annular velocities and two-dimensional speckle-tracking echocardiographic left ventricular longitudinal strain and strain rate were measured...
June 11, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/28604360/chitosan-based-hydrogels-for-developing-a-small-diameter-vascular-graft-in-vitro-and-in-vivo-evaluation
#12
Audrey Aussel, Noélie Thébaud, Xavier Berard, Vincenzo Brizzi, Samantha Delmond, Reine Bareille, Robin Siadous, Chloe James, Jean Ripoche, Marlène Durand, Alexandra Montembault, Béatrice Burdin, Didier Letourneur, Nicolas L'Heureux, Laurent David, Laurence Bordenave
Vascular grafts made of synthetic polymers perform poorly in small-diameter applications (cardiac and peripheral bypass). Chitosan is a biocompatible natural polymer that can provide a novel biological scaffold for tissue engineering development. The goal of this study was to demonstrate the biocompatibility of a novel chitosan preparation in vitro and in vivo, and to assess its potential as a scaffold for vascular applications. Methods and Results. A series of experiments of increasing complexity, ranging from in vitro biocompatibility and hemocompatibility tests to in vivo studies in small and large animals (rat and sheep), was performed to provide a comprehensive analysis of chitosan hydrogels' biological properties...
June 12, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28603855/stress-fractures-of-the-calcaneus-diagnosed-by-sonography-report-of-8-cases
#13
Stefano Bianchi, Dien Hung Luong
We present a retrospective review of 8 patients (6 women and 2 men, with an age range of 46-80 years; mean age, 60.2 years) in whom sonography was used to diagnose a calcaneal stress fracture. Sonography was performed because of a clinical suspicion of soft tissue injuries. Two patients were first assessed by standard radiography; for the remaining patients, sonography was the first imaging technique used. Patients were subsequently examined by magnetic resonance imaging, except for 1 patient in whom the diagnosis was made only on a clinical-sonographic correlation...
June 12, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28599688/usefulness-of-hemodynamically-distribution-of-intranodal-vessels-in-differentiating-metastatic-neck-lymph-nodes-value-of-color-doppler-and-spectral-wave-sonogram
#14
Uzma Mumtaz, Ahmed Farhan, Muhammad Amjad Chaudhry, Madiha Mumtaz
OBJECTIVE: To evaluate the diagnostic assessment of enlarged lymph nodes, based on its perfusion pattern by taking tissue diagnosis as gold standard. STUDY DESIGN: Analytical study. PLACE AND DURATION OF STUDY: Departments of Radiology and Pathology, PIMS Hospital, Islamabad, from February to May 2016. METHODOLOGY: Color sonography of patients with clinically, palpable cervical lymph nodes were carried by senior trainee under the supervision of senior radiologist...
May 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28595852/three-dimensional-model-based-segmentation-in-echocardiography-using-high-temporal-tissue-and-blood-flow-information
#15
Inge H Gerrits, Maartje M Nillesen, Livia Kapusta, Johan M Thijssen, Chris L de Korte
Accurate 3-D surface segmentation is a challenging task in echocardiography because of the relatively low image quality. We introduce a new method for 3-D segmentation of the endocardium involving temporal decorrelation of echo signals originating from tissue and blood using radiofrequency (RF) signals acquired in 3-D Doppler mode. Temporal features were extracted in 3-D Doppler mode, where a sequence of RF lines is recorded for each image line. Each set of RF lines is highly correlated because of the high pulse repetition frequency...
June 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28593005/real-time-elastography-in-crohn-s-disease-feasibility-in-daily-clinical-practice
#16
Andrea Giannetti, Marco Matergi, Marco Biscontri, Francesco Tedone, Lucia Falconi, Luca Franci
Ultrasound (US) is the first-line investigation in patients with abdominal symptoms and it has a role in the diagnosis and monitoring of inflammatory bowel diseases. Strain elastography (SE) is a US method for estimating tissue elasticity. This method is still not routinely used in clinical practice, although it is suggested by the EFSUMB Guidelines for the characterization of intestinal stenosis in Crohn's disease. The purpose of this Pictorial Essay is to confirm the feasibility of elastography in Crohn's disease in clinical practice by comparing elastography images with corresponding endoscopic or radiological images...
June 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28586098/diastolic-dysfunction-of-hypertrophic-cardiomyopathy-genotype-positive-subjects-without-hypertrophy-is-detected-by-tissue-doppler-imaging-a-systematic-review-and-meta-analysis
#17
Wen Liu, Dandan Sun, Jun Yang
OBJECTIVES: To evaluate whether diastolic dysfunction derived by tissue Doppler imaging (TDI) would be an earlier manifestation in genotype-positive hypertrophic cardiomyopathy (HCM) subjects without left ventricular hypertrophy (LVH). METHODS: We systematically searched Pubmed, Medline, and Web of Science with an upper date limit of June 2016 for studies evaluating the diastolic function of HCM genotype-positive subjects without hypertrophy (G+/LVH-). Based on the inclusion criteria, eligible studies were selected...
June 6, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28585568/brain-tissue-pulsatility-is-increased-in-mid-life-depression-a-comparative-study-using-ultrasound-tissue-pulsatility-imaging
#18
Thomas Desmidt, Bruno Brizard, Paul-Armand Dujardin, Redouane Ternifi, Jean-Pierre Réméniéras, Frédéric Patat, Frédéric Andersson, Jean-Philippe Cottier, Emilie Vierron, Valérie Gissot, Kang Kim, Howard Aizenstein, Wissam El-Hage, Vincent Camus
Cerebrovascular disease (CVD) is consistently associated with late-life depression but poorly documented in midlife depression. It can be hypothesized that the relatively low sensitivity of conventional neuroimaging techniques does not allow the detection of subtle CVD in midlife depression. We used Tissue Pulsatility Imaging (TPI), a novel ultrasound (US) neuroimaging technique that has demonstrated good sensitivity to detect changes in the pulsatility of small brain volumes, to identify early and subtle changes in brain vascular function in midlife depression...
June 6, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28583515/acoustic-radiation-force-impulse-imaging-of-the-transplant-kidney-correlation-between-cortical-stiffness-and-arterial-resistance-in-early-post-transplant-period
#19
H-K Wang, Y-C Lai, Y-H Lin, H-J Chiou, Y-H Chou
BACKGROUND: Acoustic radiation force impulse (ARFI) imaging is a noninvasive imaging modality for quantitative assessment of tissue stiffness. This study utilized ARFI imaging to assess the stiffness of a transplant renal cortex within the first month after renal transplantation and to explore the correlation between the cortical stiffness and arterial resistance of the transplant kidney. METHODS: Forty renal transplant recipients (male/female = 26/14; mean age: 45...
June 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28577669/diastolic-dysfunction-revisited-a-new-feasible-and-unambiguous-echocardiographic-classification-predicts-major-cardiovascular-events
#20
Niklas Dyrby Johansen, Tor Biering-Sørensen, Jan Skov Jensen, Rasmus Mogelvang
BACKGROUND: Echocardiographic classification of DDF has been widely discussed. The aim of this study was to investigate the independent prognostic value of established echocardiographic measures in a community-based population and create a new classification of DDF. METHODS: Within the Copenhagen City Heart Study, a prospective, community-based study, 1851 participants were examined by echocardiography including Tissue Doppler Imaging (TDI) in 2001 to 2003 and followed with regard to MACE (median, 10...
June 2017: American Heart Journal
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