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https://www.readbyqxmd.com/read/28339131/tissue-deformation-index-as-a-reliable-measure-of-lateral-abdominal-muscle-activation-on-m-mode-sonography
#1
Maciej Biały, Wacław Adamczyk, Rafael Gnat, Tomasz Stranc
The aim of this article is to present a novel method of evaluating the activity of lateral abdominal muscles using M-mode sonography. The method leads to calculation of the tissue deformation index, representing the percent change in lateral abdominal muscle thickness over time. The objectives of this study were as follows: (1) to establish the mean tissue deformation index values for individual lateral abdominal muscles; and (2) to establish the reliability of the tissue deformation index. In a group of 34 healthy young volunteers (mean age, 24...
March 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28320997/prognostic-impact-of-diastolic-wall-strain-in-patients-at-risk-for-heart-failure
#2
Masatoshi Minamisawa, Takashi Miura, Hirohiko Motoki, Yasushi Ueki, Kunihiko Shimizu, Wataru Shoin, Mikiko Harada, Tomoaki Mochidome, Koji Yoshie, Yasutaka Oguchi, Naoto Hashizume, Hitoshi Nishimura, Naoyuki Abe, Soichiro Ebisawa, Atsushi Izawa, Jun Koyama, Uichi Ikeda
Diastolic wall strain (DWS) is based on the linear elastic theory, according to which decreased wall thinning during diastole reflects reduced left ventricular compliance and thus increased diastolic stiffness. Increased diastolic stiffness as assessed by DWS is associated with a worse prognosis in patients who have heart failure (HF) with preserved ejection fraction. However, there are no data about the prognostic value of DWS derived by M-mode echocardiography in patients at risk for HF. We retrospectively enrolled 1829 consecutive patients without prior HF who were hospitalized for cardiovascular (CV) diseases in our hospital between 2005 and 2012...
March 21, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28299305/the-role-of-inflammatory-processes-in-occurrence-of-left-ventricular-failure-in-patients-with-chronic-kidney-disease
#3
Hassan Shemirani, Sara Tavakol, Abdolamir Atapoor, Jafar Golshahi
BACKGROUND: Recently, the relationship between increased level of inflammatory mediators and occurrence of left ventricular failure in patients with kidney disease has been suggested. The present study attempted to assess relationship between inflammatory mediators and occurrence of left ventricular failure in patients with chronic kidney disease. MATERIALS AND METHODS: This cross-sectional study was performed at Noor and Hazrat Aliasghar hospital in Isfahan between September 2012 to September 2013 on patients aged >19 years that referred for following their chronic kidney disease...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28288761/pulmonary-hypertension-in-dogs-with-heartworm-before-and-after-the-adulticide-protocol-recommended-by-the-american-heartworm-society
#4
B Serrano-Parreño, E Carretón, A Caro-Vadillo, S Falcón-Cordón, Y Falcón-Cordón, J A Montoya-Alonso
Pulmonary hypertension (pH) is a frequent and severe phenomenon in heartworm disease (Dirofilaria immitis). There is a lack of studies assessing the evolution of the proliferative endarteritis and pH caused by D. immitis after the death of the parasites, so this study evaluated the influence that the elimination of the worms exerts over the pulmonary pressure and therefore evolution of the endarteritis, through the evaluation of the Right Pulmonary Artery Distensibility (RPAD) Index and other echocardiographic measurements in 2D mode, M-mode and Doppler echocardiography in 34 dogs naturally infected by D...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28285896/perinatal-changes-in-fetal-ventricular-geometry-myocardial-performance-and-cardiac-function-in-normal-term-pregnancies
#5
Olga Patey, Michael A Gatzoulis, Basky Thilaganathan, Julene S Carvalho
BACKGROUND: The fetal heart at term is exposed to an increase in hemodynamic work as a consequence of fetal growth, increased circulating volume, and alteration in loading patterns due to maturational changes in fetoplacental circulation. The extent to which these cardiovascular changes influence human fetal and neonatal cardiac adaptation has not been fully elucidated. The aim of this study was to evaluate perinatal cardiovascular changes in ventricular geometry and myocardial performance in normal term fetuses...
March 9, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28264227/comparison-of-thoracic-ultrasonography-and-radiography-for-the-detection-of-induced-small-volume-pneumothorax-in-the-horse
#6
Jessica Partlow, Florent David, Luanne Michelle Hunt, Fabien Relave, Laurent Blond, Manuel Pinilla, Jean-Pierre Lavoie
Small volume pneumothorax can be challenging to diagnose in horses. The current standard method for diagnosis is standing thoracic radiography. We hypothesized that thoracic ultrasonography would be more sensitive. Objectives of this prospective, experimental study were to describe a thoracic ultrasound method for detection of small volume pneumothorax in horses and to compare results of radiography and ultrasound in a sample of horses with induced small volume pneumothorax. Six mature healthy horses were recruited for this study...
March 6, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28246444/m-mode-echocardiographic-reference-values-in-pantja-goats
#7
Parul Singh, Narendra Singh Jadon, Deepti Bodh, Manjul Kandpal
AIM: The aim of this study was to establish M-mode echocardiographic reference values in Pantja goats and to study the effect of gender and body weight (BW) on these parameters. MATERIALS AND METHODS: A total of 18, clinically healthy, adult Pantja goats of either sex, aged 2-4 years and weighing 10-44 kg were included in the study. Echocardiographic examination was performed in the standing unsedated animal. All measurements were made from the right parasternal long-axis left ventricular outflow tract view of the heart...
January 2017: Veterinary World
https://www.readbyqxmd.com/read/28244588/investigation-of-opg-rank-rankl-genes-as-a-genetic-marker-for-cardiac-abnormalities-in-thalassemia-major-patients
#8
Mable Misha Singh, Ravindra Kumar, Satyendra Tewari, Sarita Agarwal
OBJECTIVE: The aim of the study was to investigate the role of osteoprotegerin (OPG)/RANK/RANKL variants in left ventricular hypertrophy (LVH) and diastolic dysfunction in thalassemia major patients MATERIALS AND METHOD: One hundred and five beta-thalassemia patients who were older than 10 years of age were enrolled for the study. Two-dimensional and M-mode echocardiography analysis was done in all patients. Genotyping for OPG [rs2073617 (950 T>C), rs2073618 (1181G>C)], RANK [(rs1805034(+34694 C>T), rs12458117 (+34901 G>A) and rs75404003 (+35966insdelC)], and RANKL (rs2277438, rs9594782) variants was done using the PCR-RFLP method...
February 28, 2017: Annals of Human Genetics
https://www.readbyqxmd.com/read/28236534/computer-based-algorithmic-determination-of-muscle-movement-onset-using-m-mode-ultrasonography
#9
Andrew J Tweedell, Courtney A Haynes, Matthew S Tenan
The study purpose was to evaluate the use of computer-automated algorithms as a replacement for subjective, visual determination of muscle contraction onset using M-mode ultrasonography. Biceps and quadriceps contraction images were analyzed visually and with three different classes of algorithms: pixel standard deviation (SD), high-pass filter and Teager Kaiser energy operator transformation. Algorithmic parameters and muscle onset threshold criteria were systematically varied within each class of algorithm...
February 21, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28229480/echocardiographic-evaluation-of-right-ventricular-function-in-preterm-infants-with-bronchopulmonary-dysplasia
#10
Renata Bokiniec, Paweł Własienko, Maria Borszewska-Kornacka, Joanna Szymkiewicz-Dangel
AIM: To evaluate right ventricular function in preterm infants with and without bronchopulmonary dysplasia. METHODS: Eighty-nine preterm infants (<32 weeks) were divided into three groups: (1) no-bronchopulmonary dysplasia (n=32); (2) mild-bronchopulmonary dysplasia (n=35); (3) severe-bronchopulmonary dysplasia (n=15). Right ventricular echocardiographic parameters included the following: (1) pulsed-wave Doppler through the tricuspid valve (E/A ratio), pulmonary artery acceleration time, right ventricular ejection time, right ventricular velocity-time integral; (2) tissue Doppler measurements of myocardial velocities and atrioventricular conduction times; (3) pulsed-wave Doppler and tissue Doppler evaluation of myocardial performance index and E/E' ratio; and (4) M-mode detection of right ventricular end-diastolic wall diameter...
February 23, 2017: Echocardiography
https://www.readbyqxmd.com/read/28176821/spatial-variation-and-inconsistency-between-estimates-of-onset-of-muscle-activation-from-emg-and-ultrasound
#11
Angela V Dieterich, Alberto Botter, Taian Martins Vieira, Anneli Peolsson, Frank Petzke, Paul Davey, Deborah Falla
Delayed onset of muscle activation can be a descriptor of impaired motor control. Activation onset can be estimated from electromyography (EMG)-registered muscle excitation and from ultrasound-registered muscle motion, which enables non-invasive measurements in deep muscles. However, in voluntary activation, EMG- and ultrasound-detected activation onsets may not correspond. To evaluate this, ten healthy men performed isometric elbow flexion at 20% to 70% of their maximal force. Utilising a multi-channel electrode transparent to ultrasound, EMG and M(otion)-mode ultrasound were recorded simultaneously over the biceps brachii muscle...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28163426/a-pediatric-echocardiographic-z-score-nomogram-for-a-developing-country-indian-pediatric-echocardiography-study-the-z-score
#12
Rajendra Kumar Gokhroo, Avinash Anantharaj, Devendra Bisht, Kamal Kishor, Nishad Plakkal, Rajeswari Aghoram, Nivedita Mondal, Shashi K Pandey, Ramsagar Roy
BACKGROUND: Almost all presently available pediatric echocardiography Z-score nomograms are based on Western data. They may not be a suitable reference standard for assessing the sizes of cardiac structures of children from developing countries. OBJECTIVE: This study's objective was to collect normative data of 21 commonly measured cardiovascular structures using M-mode and two-dimensional echocardiography in Indian children aged between 4 and 15 years and to derive Z-score nomograms for each...
January 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28148963/photodynamic-therapy-monitoring-with-optical-coherence-angiography
#13
M A Sirotkina, L A Matveev, M V Shirmanova, V Y Zaitsev, N L Buyanova, V V Elagin, G V Gelikonov, S S Kuznetsov, E B Kiseleva, A A Moiseev, S V Gamayunov, E V Zagaynova, F I Feldchtein, A Vitkin, N D Gladkova
Photodynamic therapy (PDT) is a promising modern approach for cancer therapy with low normal tissue toxicity. This study was focused on a vascular-targeting Chlorine E6 mediated PDT. A new angiographic imaging approach known as M-mode-like optical coherence angiography (MML-OCA) was able to sensitively detect PDT-induced microvascular alterations in the mouse ear tumour model CT26. Histological analysis showed that the main mechanisms of vascular PDT was thrombosis of blood vessels and hemorrhage, which agrees with angiographic imaging by MML-OCA...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28140649/effects-of-a-combination-of-acepromazine-maleate-and-butorphanol-tartrate-on-conventional-and-two-dimensional-speckle-tracking-echocardiography-in-healthy-dogs
#14
Giorgia Santarelli, Jesús Talavera López, Josefa Fernández Del Palacio
OBJECTIVE To determine effects of a combination of acepromazine maleate and butorphanol tartrate on conventional echocardiographic variables and on strain values obtained by use of 2-D speckle tracking echocardiography (STE) in healthy dogs. ANIMALS 18 healthy medium- and large-size adult dogs. PROCEDURES Transthoracic echocardiographic examination (2-D, M-mode, color flow, spectral Doppler, and tissue Doppler ultrasonography) and high-definition oscillometric blood pressure measurement were performed before and after dogs were sedated by IM administration of a combination of acepromazine (0...
February 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28121016/regression-equations-for-calculation-of-z-scores-for-echocardiographic-measurements-of-right-heart-structures-in-healthy-han-chinese-children
#15
Shan-Shan Wang, Yu-Qi Zhang, Shu-Bao Chen, Guo-Ying Huang, Hong-Yan Zhang, Zhi-Fang Zhang, Lan-Ping Wu, Wen-Jing Hong, Rong Shen, Yi-Qing Liu, Jun-Xue Zhu
OBJECTIVE: Clinical decision making in children with congenital and acquired heart disease relies on measurements of cardiac structures using two-dimensional echocardiography. We aimed to establish z-score regression equations for right heart structures in healthy Chinese Han children. METHODS: Two-dimensional and M-mode echocardiography was performed in 515 patients. We measured the dimensions of the pulmonary valve annulus (PVA), main pulmonary artery (MPA), left pulmonary artery (LPA), right pulmonary artery (RPA), right ventricular outflow tract at end-diastole (RVOTd) and at end-systole (RVOTs), tricuspid valve annulus (TVA), right ventricular inflow tract at end-diastole (RVIDd) and at end-systole (RVIDs), and right atrium (RA)...
January 25, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/28120210/renin-angiotensin-system-gene-polymorphisms-as-potential-modifiers-of-hypertrophic-and-dilated-cardiomyopathy-phenotypes
#16
Bindu Rani, Amit Kumar, Ajay Bahl, Rajni Sharma, Rishikesh Prasad, Madhu Khullar
The renin-angiotensin (RAS) pathway has an important role in the etiology of heart failure and given the importance of RAS as a therapeutic target in various cardiomyopathies, genetic polymorphisms in the RAS genes may modulate the risk and severity of disease in cardiomyopathy patients. In the present study, we examined the association of RAS pathway gene polymorphisms, angiotensin converting enzyme (ACE), angiotensinogen (AGT), and angiotensin receptor type 1 (AGTR1) with risk and disease severity in Asian Indian idiopathic cardiomyopathy patients...
March 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28115808/the-effects-of-ivabradine-on-left-ventricular-synchronization-and-tei-index-in-patients-with-systolic-heart-failure
#17
Fatma Hizal Erdem, Serkan Ozturk, Selçuk Öztürk, Alim Erdem, Selim Ayhan, Mustafa Öztürk, İbrahim Dönmez, Davut Baltacı, Mehmet Yazıcı
BACKGROUND: The aim of our study was to evaluate in stable outpatients with systolic heart failure (HF) the 3 months effect of ivabradine on LV synchronization and Tei index in stable outpatients with systolic HF. METHODS: We evaluated prospectively 40 (30 males, 10 females) patients with HF. All patients were evaluated before and after treatment by transthoracic M mode, two dimensional (2D), pulsed-wave (PW), continuous wave (CW), color flow and tissue Doppler imaging (TDI) and tissue synchronization imaging (TSI)...
January 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/28110433/a-comprehensive-analysis-of-cardiac-valve-plane-displacement-in-healthy-adults-age-stratified-normal-values-by-cardiac-magnetic-resonance
#18
Marco M Ochs, Thomas Fritz, Florian André, Johannes Riffel, Derliz Mereles, Matthias Müller-Hennessen, Evangelos Giannitsis, Hugo A Katus, Matthias G Friedrich, Sebastian J Buss
Cardiac valve plane displacement (CVPD) reflects longitudinal LV function. The purpose of the present study was to determine regional heterogeneity of CVPD in healthy adults to provide normal values by cardiac magnetic resonance (CMR). We measured the anterior aortic plane systolic excursion (AAPSE); the anterior, anterolateral, inferolateral, inferior, and inferoseptal mitral annular plane systolic excursion (MAPSE); and the lateral tricuspid annulus plane systolic excursion (TAPSE). Systolic excursion was measured as the distance from peak end-diastolic to peak end-sysstolic annular position (peak-to-peak) in cine images acquired in 2-, 3- and 4-chamber views...
January 21, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28107368/multi-channel-optical-coherence-elastography-using-relative-and-absolute-shear-wave-time-of-flight
#19
Eli Elyas, Alex Grimwood, Janine T Erler, Simon P Robinson, Thomas R Cox, Daniel Woods, Peter Clowes, Ramona De Luca, Franco Marinozzi, Jérémie Fromageau, Jeffrey C Bamber
Elastography, the imaging of elastic properties of soft tissues, is well developed for macroscopic clinical imaging of soft tissues and can provide useful information about various pathological processes which is complementary to that provided by the original modality. Scaling down of this technique should ply the field of cellular biology with valuable information with regard to elastic properties of cells and their environment. This paper evaluates the potential to develop such a tool by modifying a commercial optical coherence tomography (OCT) device to measure the speed of shear waves propagating in a three-dimensional (3D) medium...
2017: PloS One
https://www.readbyqxmd.com/read/28090255/clinical-utility-of-echocardiography-for-the-diagnosis-and-prognosis-in-children-with-bronchopulmonary-dsyplasia
#20
Young Earl Choi, Hwa Jin Cho, Eun Song Song, In Seok Jeong, Namsik Yoon, Young Youn Choi, Jae Sook Ma, Young Kuk Cho
BACKGROUND: Bronchopulmonary dysplasia (BPD) may result in chronic pulmonary artery hypertension and right ventricular (RV) dysfunction. Various echocardiographic assessments of RV dysfunction have been used to determine whether echocardiographic measurements of premature infants with BPD could provide sensitive measures of RV function that correlates with BPD severity. METHODS: Twenty-eight control subjects without BPD (non BPD group), 28 patients with mild BPD, 11 patients with moderate BPD, and six patients with severe BPD underwent echocardiograms with standard measurement such as ejection fraction by M-mode, tricuspid regurgitation pressure gradient, myocardial performance index (MPI) derived from pulse Doppler, and tissue Doppler imaging (TDI) measurements...
December 2016: Journal of Cardiovascular Ultrasound
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