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Tissue doppler imaging

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https://www.readbyqxmd.com/read/28822668/intrinsic-wave-propagation-of-myocardial-stretch-a-new-tool-to-evaluate-myocardial-stiffness-a-pilot-study-in-patients-with-aortic-stenosis-and-mitral-regurgitation
#1
Cristina Pislaru, Mahmoud M Alashry, Jeremy J Thaden, Patricia A Pellikka, Maurice Enriquez-Sarano, Sorin V Pislaru
BACKGROUND: Left ventricular (LV) filling following atrial contraction generates LV myocardial stretch that propagates from base to apex with a speed proportional to myocardial elasticity. The aim of this study was to test the hypothesis that intrinsic velocity propagation of myocardial stretch (iVP) would be altered in patients with valvular disease and chronic LV pressure overload or volume overload, which may adversely affect mechanical properties of the LV tissue. A second aim was to compare iVP with flow propagation velocity in the chamber...
August 16, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28817483/time-course-study-on-left-ventricular-function-in-a-rabbit-model-of-ischemia-reperfusion-injury-with-morphine-preconditioning
#2
Baihua Zhao, Chengxiao Liu, Darong Pu, Shi Zeng, Xi Dai, Minghui Liu
AIMS: The study aimed to analyze the left ventricular longitudinal function in a rabbit model of myocardial ischemia-reperfusion with morphine preconditioning through strain rate imaging and evaluate the effect of morphine preconditioning. METHODS: A myocardial ischemia-reperfusion model was induced by occlusion and recanalization of the coronary artery in forty male New Zealand white rabbits, which were divided into a sham group, morphine group, and vehicle control group...
August 15, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28814913/right-ventricular-remodeling-and-dysfunction-in-obstructive-sleep-apnea-a-systematic-review-of-the-literature-and-meta-analysis
#3
REVIEW
Abdirashit Maripov, Argen Mamazhakypov, Meerim Sartmyrzaeva, Almaz Akunov, Kubatbek Muratali Uulu, Melis Duishobaev, Meerim Cholponbaeva, Akylbek Sydykov, Akpay Sarybaev
BACKGROUND: Recent studies have reported that obstructive sleep apnea (OSA) patients present alterations in right ventricular (RV) structure and function. However, large randomized controlled trials evaluating the impact of OSA on the right ventricle are lacking. METHODS: A comprehensive electronic database (PubMed, Web of Science, and Google Scholar) and reference search up to October 30, 2016, was performed. A systematic review and meta-analysis were performed to assess RV structure and function in OSA patients based on conventional echocardiography and tissue Doppler imaging...
2017: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
https://www.readbyqxmd.com/read/28801279/-high-frequency-echocardiography-for-assessment-of-regional-wall-motion-abnormality-and-cardiac-function-in-mice-with-myocardial-infarction
#4
Jing Wang, Wei-Jiang Tan, Xiang Li, Gui-Ping Zhang, Jia-Yuan Huang, Xiao-Hong Chen, Qian Lei, Feng-Hua Yang, Ren Huang
OBJECTIVE: To evaluate the value of high-frequency echocardiography in assessing cardiac structure and function in a mouse model of myocardial infarction. METHODS: Twenty-five C57BL/6 mice were randomly divided into sham-operated group (n=10) and myocardial infarction model group (n=15) established by ligation of the left anterior descending artery. The cardiac structure, regional wall motion and cardiac function of mice were examined with pulsed wave Doppler (PWD), tissue Doppler imaging (TDI), EKV and M-mode echocardiography 3 days before and at 1 week after the operation...
August 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28801075/doppler-assessment-of-diastolic-function-reflect-the-severity-of-injury-in-rats-with-chronic-heart-failure
#5
Pablo Sanchez, Jordan J Lancaster, Kyle Weigand, Saffie-Alrahman Ezz-Eldin Mohran, Steven Goldman, Elizabeth Juneman
OBJECTIVE: For chronic heart failure (CHF), more emphasis has been placed on evaluation of systolic as opposed to diastolic function. Within the study of diastology, measurements of left ventricular (LV) longitudinal myocardial relaxation have the most validation. Anterior wall radial myocardial tissue relaxation velocities along with mitral valve inflow (MVI) patterns are applicable diastolic parameters in the differentiation between moderate and severe disease in the ischemic rat model of CHF...
August 8, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28800207/optically-derived-metabolic-and-hemodynamic-parameters-predict-hippocampal-neurogenesis-in-the-btbr-mouse-model-of-autism
#6
David Abookasis, Danit Lerman, Hava Roth, Mati Tfilin, Gadi Turgeman
In the present study, we made use of dual-wavelength laser speckle imaging (DW-LSI) to assess cerebral blood flow in the BTBR genetic mouse model of Autism Spectrum Disorder, as well as control (C57Bl/6J) mice. Since the deficits in social behavior demonstrated by BTBR mice are attributed to changes in neural tissue structure and function, we postulated that these changes can be detected optically using DW-LSI. BTBR mice demonstrated reductions in both cerebral blood flow (CBF) and cerebral oxygen metabolism (CMRO2 ), as suggested by studies using conventional neuroimaging technologies to reflect impaired neuronal activation and cognitive function...
August 11, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28795324/the-fgf23-klotho-axis-and-cardiac-tissue-doppler-imaging-in-pediatric-chronic-kidney-disease-a-prospective-cohort-study
#7
Ylva Tranæus Lindblad, Hannes Olauson, Georgios Vavilis, Ulf Hammar, Maria Herthelius, Jonas Axelsson, Peter Bárány
BACKGROUND: Chronic kidney disease-associated mineral bone disorder (CKD-MBD) is common in pediatric kidney disease patients and a risk factor for future cardiovascular disease (CVD). Fibroblast growth factor-23 (FGF23) and Klotho are novel key players in CKD-MBD, and has been suggested to be involved in the development of CVD. METHODS: This prospective cohort study included 74 pediatric patients; 31 with CKD (age range 0.8-18.8 years, glomerular filtration rate (GFR) range 9-68 mL/min/1...
August 9, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28791311/assessment-of-diabetic-cardiomyopathy-by-cardiovascular-magnetic-resonance-t1-mapping-correlation-with-left-ventricular-diastolic-dysfunction-and-diabetic-duration
#8
Yongning Shang, Xiaochun Zhang, Weilling Leng, Liu Chen, Xiaotian Lei, Tianjing Zhang, Andreas Greiser, Ziwen Liang, Jian Wang
PURPOSE: To quantify extracellular matrix expansion with the cardiovascular magnetic resonance (CMR) T1 mapping technique and the derived extracellular volume fraction (ECV) in diabetic cardiomyopathy (DbCM) patients and to detect the relationship among ECV, duration of diabetes, and diastolic function. MATERIALS: Thirty-eight patients with diabetic cardiomyopathy (20 males, age 54.6 ± 8.6 years) and thirty-two matched normal controls (15 males, age 51.4 ± 13...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28780920/left-ventricular-diastolic-dysfunction-without-left-ventricular-hypertrophy-in-obese-children-and-adolescents-a-tissue-doppler-imaging-and-cardiac-troponin-i-study
#9
Sonia A El Saiedi, Marwa F Mira, Sahar A Sharaf, Maysoun M Al Musaddar, Rania M H El Kaffas, Antoine F AbdelMassih, Ihab H Y Barsoum
BACKGROUND: Obesity increases the risk for various cardiovascular problems. Increase in body mass index is often an independent risk factor for the development of elevated blood pressure and clustering of various cardiovascular risk factors. OBJECTIVE: To determine early markers of left ventricular affection in obese patients before the appearance of left ventricular hypertrophy. METHODS: In this cross-sectional study, we evaluated 42 obese patients and 30 healthy controls...
August 7, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28772277/factors-to-consider-when-deciding-on-the-type-of-free-flap-reconstruction-of-head-and-neck-soft-tissue-defects
#10
Mohammed Thabet Aladimi, Bo Han, Chunjie Li, Hussein Helal, Zhenjie Gao, Longjiang Li
OBJECTIVES: The aim of the study was to evaluate the functional and aesthetic outcomes on donor and recipient sites and to determine the effects of technical factors including flap thickness and vessel diameters measured by ultrasonography as well as the size of the defect and postoperative volume reduction of the flaps measured by magnetic resonance imaging (MRI). METHODS: In patients who had undergone soft tissue reconstructive surgery between March 2013 and March 2016 using 55 anterolateral thigh flaps (ALTFs), 30 radial forearm flaps (RFFs), and 18 latissimus dorsi flaps (LDFs), color Doppler ultrasonography was performed to measure the thickness of the flap at the site of the perforator...
August 4, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28770692/effect-of-high-dose-oral-cholecalciferol-on-cardiac-mechanics-in-children-with-chronic-kidney-disease
#11
Murat Deveci, Mehmet Baha Aytaç, Gürkan Altun, Özlem Kayabey, Kadir Babaoğlu
Cardiovascular factors are an important cause of mortality in chronic kidney disease, and vitamin-D deficiency is common in this patient population. Therefore, we aimed to investigate the effect of oral cholecalciferol on cardiac mechanics in children with chronic kidney disease. A total of 41 children with chronic kidney disease - the patient group - and 24 healthy subjects - the control group - free of any underlying cardiac or renal disease with low 25-hydroxyvitamin-D3 levels were evaluated by conventional tissue Doppler imaging and two-dimensional speckle-tracking echocardiography, both at baseline and following Stoss vitamin-D supplementation...
August 3, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28766046/relationship-between-left-ventricular-diastolic-dysfunction-and-very-late-recurrences-after-multiple-procedures-for-atrial-fibrillation-ablation
#12
Naoaki Onishi, Kazuaki Kaitani, Masashi Amano, Sari Imamura, Jiro Sakamoto, Yodo Tamaki, Soichiro Enomoto, Makoto Miyake, Toshihiro Tamura, Hirokazu Kondo, Chisato Izumi, Yoshihisa Nakagawa
Although very late recurrences (VLRs) (first recurrence >12 months after the last catheter ablation) of atrial fibrillation (AF) after multiple catheter ablation procedures are rare, it remains a critical issue. The risk factors for VLRs remain largely unclear. From December 2011 to April 2014, 253 patients underwent an initial catheter ablation. Of the 253 patients, 21 had AF recurrences within 1 year after the last catheter ablation. The study was conducted in the remaining 232 patients. Left ventricular diastolic dysfunction (LVDD) was assessed by echocardiography using composite categories with tissue Doppler imaging and left atrial volume measurements, i...
August 1, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28764222/evaluation-of-myocardial-injury-using-standard-diagnostic-tools-and-tissue-doppler-imaging-in-blunt-trauma-chest
#13
Parshotam Lal Gautam, Neeru Luthra, Manpreet Kaur, Jaspal Singh, Gurpreet Singh Wander, Rohit Tandon, Namrata, Nikhil Gautam
INTRODUCTION: Myocardial contusion is an entity in chest trauma which is difficult to diagnose. Current practice relies more on cardiac-specific biochemical markers and standard echocardiography, but no gold standard test exists. The application of Tissue Doppler imaging is yet unexplored. AIM: The present study was designed to evaluate cardiac injury in patients with blunt trauma chest using conventional trans-thoracic echocardiography parameters and Tissue Doppler imaging...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28754888/gyrocardiography-a-new-non-invasive-monitoring-method-for-the-assessment-of-cardiac-mechanics-and-the-estimation-of-hemodynamic-variables
#14
Mojtaba Jafari Tadi, Eero Lehtonen, Antti Saraste, Jarno Tuominen, Juho Koskinen, Mika Teräs, Juhani Airaksinen, Mikko Pänkäälä, Tero Koivisto
Gyrocardiography (GCG) is a new non-invasive technique for assessing heart motions by using a sensor of angular motion - gyroscope - attached to the skin of the chest. In this study, we conducted simultaneous recordings of electrocardiography (ECG), GCG, and echocardiography in a group of subjects consisting of nine healthy volunteer men. Annotation of underlying fiducial points in GCG is presented and compared to opening and closing points of heart valves measured by a pulse wave Doppler. Comparison between GCG and synchronized tissue Doppler imaging (TDI) data shows that the GCG signal is also capable of providing temporal information on the systolic and early diastolic peak velocities of the myocardium...
July 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28749348/fast-simulation-of-dynamic-ultrasound-images-using-the-gpu
#15
Sigurd Storve, Hans Torp
Simulated ultrasound data is a valuable tool for development and validation of quantitative image analysis methods in echocardiography. Unfortunately, simulation time can become prohibitive for phantoms consisting of a large number of point-scatterers. The COLE algorithm by Gao et al. is a fast convolution-based simulator that trades simulation accuracy for improved speed. We present highly efficient parallelized CPU- and GPU-implementations of the COLE algorithm with an emphasis on dynamic simulations involving moving pointscatterers...
July 25, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28748877/vitamin-d-levels-and-other-biochemical-parameters-of-mineral-bone-disorders-and-their-association-with-diastolic-dysfunction-and-left-ventricular-mass-in-young-nondiabetic-adult-patients-with-chronic-kidney-disease
#16
Satyendra Kumar Sonkar, Mohit Bhutani, Gyanendra Kumar Sonkar, Sant Kumar Pandey, Sharad Chandra, Vivek Bhosale
Cardiovascular disease (CVD) is the leading cause of morbidity and mortality in patients with end-stage renal disease. Chronic kidney disease (CKD)-associated cardiovascular mortality is more prevalent in those with diastolic heart failure and is an early predictor, while increased left ventricular mass (LVM) is a strong independent risk factor. Hypovitaminosis D is extensively being studied as a nontraditional risk factor for CVD. The aim of the present study is to look at the association of Vitamin D and other parameters of mineral bone disorder (MBD) with diastolic dysfunction and LVM in nondiabetic young adult patients with CKD...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28741751/assessment-of-diastolic-function-of-normal-fetal-heart-using-the-dual-gate-doppler-method
#17
Mayumi Takano, Masahiko Nakata, Sumito Nagasaki, Rei Ueyama, Mineto Morita
OBJECTIVES: The ratio of mitral peak early diastolic filling to early diastolic mitral annular velocity (E/e') reflects diastolic cardiac function in adults. The Dual gate Doppler (DD) method enables measurements of E/e' in the same heartbeat. This study was designed to assess the utility of the DD method for measurement of fetal E/e', and to determine reference ranges for normal fetuses. METHODS: This prospective study comprised normal singleton pregnancies between 16 and 36 weeks of gestational age (GA)...
July 25, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28741295/early-segmental-relaxation-abnormalities-in-hypertrophic-cardiomyopathy-for-differential-diagnostic-of-patients-with-left-ventricular-hypertrophy
#18
Christian Voigt, Julia Münch, Maxim Avanesov, Anna Suling, Katrin Witzel, Gunnar Lund, Monica Patten
BACKGROUND: Hypertrophic cardiomyopathy (HCM) is characterized by asymmetric left ventricular hypertrophy (LVH). However, clinical signs can be subtle and differentiation from other causes of LVH is challenging. HYPOTHESIS: As diastolic dysfunction (DD) is an early sign in HCM, we aimed to find regional changes in relaxation pattern for differentiation from other entities of LVH. METHODS: In 148 patients (81 HCM, 55 arterial hypertension (AHT), 12 Fabry disease) and 63 healthy controls, relaxation patterns were assessed using regional tissue Doppler imaging...
July 24, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28740835/severe-pulmonary-hypertension-due-to-combined-pulmonary-fibrosis-and-emphysema-another-cause-of-death-among-smokers
#19
REVIEW
André Carramenha de Góes Hirano, Eduardo Pelegrineti Targueta, Fernando Peixoto Ferraz de Campos, João Augusto Dos Santos Martines, Dafne Andrade, Silvana Maria Lovisolo, Aloisio Felipe-Silva
In 2005, the combined pulmonary fibrosis and emphysema (CPFE) was first defined as a distinct entity, which comprised centrilobular or paraseptal emphysema in the upper pulmonary lobes, and fibrosis in the lower lobes accompanied by reduced diffused capacity of the lungs for carbon monoxide (DLCO). Recently, the fibrosis associated with the connective tissue disease was also included in the diagnosis of CPFE, although the exposure to tobacco, coal, welding, agrochemical compounds, and tire manufacturing are the most frequent causative agents...
April 2017: Autopsy & case reports
https://www.readbyqxmd.com/read/28736982/understanding-the-influence-of-flow-velocity-wall-motion-filter-pulse-repetition-frequency-and-aliasing-on-power-doppler-image-quantification
#20
Maricy R Martins, Wellington P Martins, Carlos A M Soares, Andre H Miyague, Marek J Kudla, Theo Z Pavan
OBJECTIVES: Although power Doppler imaging has been used to quantify tissue and organ vascularity, many studies showed that limitations in defining adequate ultrasound machine settings and attenuation make such measurements complex to be achieved. However, most of these studies were conducted by using the output of proprietary software, such as Virtual Organ computer-aided analysis (GE Healthcare, Kretz, Zipf, Austria); therefore, many conclusions may not be generalizable because of unknown settings and parameters used by the software...
July 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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