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https://www.readbyqxmd.com/read/29341849/factors-affecting-occlusion-pressure-and-ischemic-preconditioning
#1
Henry Brown, Martyn J Binnie, Brian Dawson, Nicola Bullock, Brendan R Scott, Peter Peeling
PURPOSE: To determine the effect of limb selection (upper/lower), cuff width (small (6 cm)/medium (13 cm) upper; medium/large (18 cm) lower) and anthropometry on arterial occlusion pressure (AOP) in ischemic preconditioning (IPC). METHODS: Twenty athletes (10 females and 10 males) had surface anthropometry and dual x-ray absorptiometry (DXA) assessments before using Doppler ultrasound to confirm AOP for each limb. Subsequently, 5 min of occlusion occurred, with near-infrared spectroscopy (NIRS) measuring muscle oxygenation changes...
January 17, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29341213/detection-of-subclinical-left-ventricular-dysfunction-by-tissue-doppler-imaging-in-horses-with-aortic-regurgitation
#2
S Ven, A Decloedt, D De Clercq, L Vera, F Rademakers, G van Loon
BACKGROUND: Aortic regurgitation (AR) can have an important clinical impact and in some cases leads to left ventricular (LV) failure. Tissue Doppler imaging (TDI) is an echocardiographic technique that has been used in horses to detect LV dysfunction. OBJECTIVES: To examine whether TDI detects changes in radial myocardial wall motion in horses with AR compared to control horses. STUDY DESIGN: Case-control study. METHODS: Echocardiography was performed in 30 healthy Warmblood horses and 34 Warmblood horses with AR, subdivided in groups with mild, moderate or severe AR...
January 17, 2018: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29339568/bone-surface-enhancement-in-ultrasound-images-using-a-new-doppler-based-acquisition-processing-method
#3
Xu Yang, Songyuan Tang, Ennio Tasciotti, Raffaella Righetti
Ultrasound (US) imaging has long been considered as a potential aid in orthopedic surgeries. US technologies are safe, portable and do not use radiations. This would make them a desirable tool for real-time assessment of fractures and to monitor fracture healing. However, image quality of US imaging methods in bone applications is limited by speckle, attenuation, shadow, multiple reflections and other imaging artifacts. While bone surfaces typically appear in US images as somewhat 'brighter' than soft tissue, they are often not easily distinguishable from the surrounding tissue...
January 17, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29338840/hydrogen-sulfide-provides-intestinal-protection-during-a-murine-model-of-experimental-necrotizing-enterocolitis
#4
Natalie A Drucker, Amanda R Jensen, Michael Ferkowicz, Troy A Markel
BACKGROUND: Necrotizing enterocolitis (NEC) continues to be a morbid surgical condition among preterm infants. Novel therapies for this condition are desperately needed. Hydrogen sulfide (H2S) is an endogenous gasotransmitter that has been found to have beneficial properties. We therefore hypothesized that intraperitoneal injection of various H2S donors would improve clinical outcomes, increase intestinal perfusion, and reduce intestinal injury in an experimental mouse model of necrotizing enterocolitis...
December 24, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29338497/a-prospective-observational-study-comparing-cardiac-function-of-small-for-gestational-age-with-appropriate-for-gestational-age-babies-using-serial-echocardiographic-studies
#5
Manish Kumar, Santhanam Sridhar, Niranjan Thomas
BACKGROUND: Approximately 30% of babies born in India are low birth weight (LBW) and about 70% of LBW babies are small for gestational age (SGA). Though there are several trials that have evaluated cardiac function of intrauterine growth restricted (IUGR) babies in utero, there is limited data about postnatal cardiac function in SGA babies during early neonatal period. This study was conducted to evaluate the cardiac functions of SGA babies by serial echocardiographic measurements and compare this with appropriate for gestational age (AGA) babies during the early postnatal period...
January 16, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29332921/early-diastolic-left-ventricular-relaxation-in-normal-neonates-is-influenced-by-ventricular-stiffness-and-longitudinal-systolic-function
#6
Yukako Homma, Yasunobu Hayabuchi, Tomomasa Terada, Miki Inoue, Kazuhiro Mori
Tissue Doppler velocity during early diastole (e') is one of the most feasible and reproducible echocardiographic assessments to reflect active relaxation of the left ventricle. Although several reports have described the mechanisms of temporal diastolic dysfunction in the early neonatal period, factors influencing diastolic function have not been determined. The purpose of this study was to elucidate factors significantly influencing e' in the early neonatal period.A total of 179 consecutive normal neonates underwent echocardiographic studies performed at 0 days and 5-10 days after birth...
January 15, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29330703/association-between-atrial-ventricular-and-vascular-morphofunctional-alterations-in-rheumatoid-arthritis
#7
Alessandro Maloberti, Marta Riva, Marijana Tadic, Carlo Valena, Paolo Villa, Ilenia Boggioni, Maria Rosa Pozzi, Guido Grassi
INTRODUCTION: Rheumatoid arthritis (RA) represents a risk of non-fatal and cardiovascular events. The aim of the present study was to evaluate simultaneously left and right atrial and ventricular function, as well as arterial stiffness, in RA patients. METHODS: This cross-sectional study included 55 consecutive RA patients and 55 healthy age and gender-matched controls. Blood pressure and arterial stiffness were assessed in all participants, who also underwent a complete echocardiographic examination...
January 12, 2018: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/29330683/cardiac-function-during-weaning-failure-the-role-of-diastolic-dysfunction
#8
Ferran Roche-Campo, Alexandre Bedet, Emmanuel Vivier, Laurent Brochard, Armand Mekontso Dessap
BACKGROUND: Cardiac dysfunction is a common cause of weaning failure. Weaning shares some similarities with a cardiac stress test and may challenge active phases of the cardiac cycle-like ventricular contractility and relaxation. This study aimed at assessing systolic and diastolic function during the weaning process and scrutinizing their dynamics during weaning trials. METHODS: Echocardiography was performed during baseline ventilator settings to assess cardiac function at the initiation of the weaning process and at the start and the end of consecutive weaning trials (performed at day-1, day-2, and before extubation if applicable) to explore the evolution of left ventricle contractility and relaxation in a subset of patients...
January 9, 2018: Annals of Intensive Care
https://www.readbyqxmd.com/read/29329687/bubble-induced-color-doppler-feedback-correlates-with-histotripsy-induced-destruction-of-structural-components-in-liver-tissue
#9
Jonathan J Macoskey, Xi Zhang, Timothy L Hall, Jiaqi Shi, Shahaboddin Alahyari Beig, Eric Johnsen, Fred T Lee, Charles A Cain, Zhen Xu
Bubble-induced color Doppler (BCD) is a histotripsy-therapy monitoring technique that uses Doppler ultrasound to track the motion of residual cavitation nuclei that persist after the collapse of the histotripsy bubble cloud. In this study, BCD is used to monitor tissue fractionation during histotripsy tissue therapy, and the BCD signal is correlated with the destruction of structural and non-structural components identified histologically to further understand how BCD monitors the extent of treatment. A 500-kHz, 112-element phased histotripsy array is used to generate approximately 6- × 6- × 7-mm lesions within ex vivo bovine liver tissue by scanning more than 219 locations with 30-1000 pulses per location...
January 9, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29325064/comparison-of-right-ventricular-function-after-ministernotomy-and-full-sternotomy-aortic-valve-replacement-a-randomized-study
#10
Magnus Dalén, Cristina Oliveira Da Silva, Ulrik Sartipy, Reidar Winter, Anders Franco-Cereceda, Jasmin Barimani, Magnus Bäck, Peter Svenarud
OBJECTIVES: Right ventricular (RV) function is impaired after cardiac surgery, possibly because of the opening of the pericardium. In minimally invasive aortic valve replacement, the pericardium is only partially incised. METHODS: A randomized trial compared RV function after ministernotomy versus full sternotomy in 40 adults undergoing aortic valve replacement at the Karolinska University Hospital. Primary outcomes were tricuspid annular plane systolic excursion, RV pulsed-wave tissue Doppler velocity, RV fractional area change and basal and mid-RV transversal diameters on postoperative Days 4 and 40...
January 8, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29323660/laser-doppler-sensing-for-blood-vessel-detection-with-a-biologically-inspired-steerable-needle
#11
Vani Virdyawan, Matthew Oldfield, Ferdinando Rodriguez Y Baena
Puncturing blood vessels during percutaneous intervention in minimally invasive brain surgery can be a life threatening complication. Embedding a forward looking sensor in a rigid needle has been proposed to tackle this problem but, when using a rigid needle, the procedure needs to be interrupted and the needle extracted if a vessel is detected. As an alternative, we propose a novel optical method to detect a vessel in front of a steerable needle. The needle itself is based on a biomimetic, multi-segment design featuring four hollow working channels...
January 11, 2018: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/29321822/pursuing-meaningful-end-points-for-stem-cell-therapy-assessment-in-ischemic-cardiac-disease
#12
REVIEW
Maria Dorobantu, Nicoleta-Monica Popa-Fotea, Mihaela Popa, Iulia Rusu, Miruna Mihaela Micheu
Despite optimal interventional and medical therapy, ischemic heart disease is still an important cause of morbidity and mortality worldwide. Although not included in standard of care rehabilitation, stem cell therapy (SCT) could be a solution for prompting cardiac regeneration. Multiple studies have been published from the beginning of SCT until now, but overall no unanimous conclusion could be drawn in part due to the lack of appropriate end-points. In order to appreciate the impact of SCT, multiple markers from different categories should be considered: Structural, biological, functional, physiological, but also major adverse cardiac events or quality of life...
December 26, 2017: World Journal of Stem Cells
https://www.readbyqxmd.com/read/29320957/cardiovascular-and-metabolic-health-of-74-children-from-women-previously-diagnosed-with-polycystic-ovary-syndrome-in-comparison-with-a-population-based-reference-cohort
#13
Marlieke A de Wilde, Jacobien B Eising, Marlise N Gunning, Maria P H Koster, Annemieke M V Evelein, Geertje W Dalmeijer, Cuno S P M Uiterwaal, Marinus J C Eijkemans, Cornelis K van der Ent, Folkert J Meijboom, Bart C J M Fauser
Women with polycystic ovary syndrome (PCOS) have compromised cardiovascular health profiles and an increased risk of pregnancy complications. In order to evaluate potential consequences, we aim to compare the cardiovascular and metabolic health of the children from women with PCOS with a population-based reference cohort. We included children from women with PCOS between the age of 2.5 to 4 years (n = 42) and 6 to 8 years (n = 32). The reference groups consisted of 168 (3-4 years old) and 130 children (7-8 years old)...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29318795/isoflurane-s-effect-on-intraoperative-systolic-left-ventricular-performance-in-cardiac-valve-surgery-patients
#14
Ju Deok Kim, Ilsoon Son, Won Kyoung Kwon, Tae Yun Sung, Hanafi Sidik, Karam Kim, Hyun Kang, Jiyon Bang, Gwi Eun Yeo, Dong Kyu Lee, Tae Yop Kim
BACKGROUND: Isoflurane, a common anesthetic for cardiac surgery, reduced myocardial contractility in many experimental studies, few studies have determined isoflurane's direct impact on the left ventricular (LV) contractile function during cardiac surgery. We determined whether isoflurane dose-dependently reduces the peak systolic velocity of the lateral mitral annulus in tissue Doppler imaging (S') in patients undergoing cardiac surgery. METHODS: During isoflurane-supplemented remifentanil-based anesthesia for patients undergoing cardiac surgery with preoperative LV ejection fraction greater than 50% (n = 20), we analyzed the changes of S' at each isoflurane dose increment (1...
January 22, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29316829/effects-of-carbomer-940-hydrogel-on-burn-wounds-an-in-vitro-and-in-vivo-study
#15
Farzad Hayati, Seyed Mehdi Ghamsari, Mohammad Mehdi Dehghan, Ahmad Oryan
PURPOSE: This study was designed to investigate the applicability of carbomer 940 hydrogel on skin-burn wounds by focusing on its effects on the zone of stasis. METHOD: Fibroblast cells were used to assess the cytotoxicity of carbomer 940. Wound healing was monitored by laser Doppler flowmetry and histopathological analysis. Twenty adult male Wistar rats were randomly divided into two groups (N = 10 each). After shaving their dorsum, a "burn comb" was contacted bilaterally on each side of the spine...
January 10, 2018: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/29316158/reduced-stroke-distance-of-the-left-ventricular-outflow-tract-is-independently-associated-with-long-term-mortality-in%C3%A2-patients-hospitalized-due-to-heart-failure
#16
You Zhong, Qays Almodares, JieFu Yang, Fang Wang, Michael Fu, Magnus C Johansson
PURPOSE: Reduced blood circulation is an important feature of heart failure, and Doppler stroke distance of the left ventricular outflow tract is a measure of forward stroke volume. Several echocardiographic parameters have known prognostic implications in heart failure, but the prognostic implications of stroke distance in relation to other parameters are insufficiently known. The aim was therefore to test the hypothesis that stroke distance is associated with five-year all-cause mortality, independently of other echocardiography variables, and that stroke distance has added long-term prognostic value...
January 9, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29310958/increased-left-ventricular-filling-pressure-and-arterial-occlusion-in-stroke-related-to-atrial-fibrillation
#17
Wi-Sun Ryu, Eun-Kee Bae, Soo-Hyun Park, Sang-Wuk Jeong, Dawid Schellingerhout, Matthias Nahrendorf, Dong-Eog Kim
BACKGROUND: We investigated whether left ventricular filling pressure is associated with arterial occlusion in patients with ischemic stroke related to atrial fibrillation (AF). METHODS: Ninety-nine patients with AF-related stroke were included. Left ventricular filling pressure was assessed by E (early mitral inflow velocity)/e' (early diastolic velocity of the mitral valve annulus velocity) ratio based on tissue Doppler echocardiography. Arterial occlusion was evaluated by computed tomography or magnetic resonance angiography...
January 5, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29306852/trichosporon-asahii-septic-thrombophlebitis-following-lower-extremity-amputation-in-an-immunocompetent-host
#18
Pradeep Kumar Mada, Folusakin Ayoade, Ailing Li, John Todd
A 59-year-old man with a history of peripheral vascular disease status post femoral popliteal bypass presented with critical limb ischaemia of the left leg. An arterial Doppler ultrasound showed an occluded graft requiring an above knee amputation. Five days after surgery, the patient developed fever, leucocytosis, significant stump swelling and pain, and serosanguinous discharge from his wound. Wound swab cultures from the stump grew Trichosporon asahii A venous Doppler ultrasound revealed extensive thrombosis of the left lower extremity...
January 6, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29306590/new-definition-criteria-of-myocardial-dysfunction-in-patients-with-liver-cirrhosis-a-speckle-tracking-and-tissue-doppler-imaging-study
#19
Roxana Cristina Rimbaş, Sorina Mihăilă Baldea, Ruxandra Drăgoi Galrinho Antunes Guerra, Simona Ionela Visoiu, Mihai Rimbaş, Corina Silvia Pop, Dragoş Vinereanu
There are no clear recommendations regarding cirrhotic cardiomyopathy (CC) evaluation in patients with pre-transplant liver cirrhosis. The roles of new methods, tissue Doppler imaging (TDI) and speckle tracking echocardiography (STE) in the diagnosis and prognosis of cirrhotic cardiomyopathy remain controversial. We investigated the utility of TDI/STE parameters in cirrhotic cardiomyopathy diagnosis and also in predicting mortality in patients with liver cirrhosis. Left/right ventricular function was studied using conventional TDI (velocities) and STE (strain/strain rate)...
January 3, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29305036/right-ventricular-structure-and-function-in-the-veteran-ultramarathon-runner-is-there-evidence-for-chronic-maladaptation
#20
Oliver Rothwell, Keith George, John Somauroo, Rachel Lord, Mike Stembridge, Rob Shave, Martin D Hoffman, Mathew Wilson, Euan Ashley, Francois Haddad, Thijs M H Eijsvogels, David Oxborough
BACKGROUND: It has been proposed that chronic exposure to prolonged strenuous exercise may result in maladaptation of the right ventricle (RV). The of this study aim was to establish RV structure and function, including septal insertion points, using conventional echocardiography and myocardial strain (ε) imaging in a veteran population of ultramarathon runners (UR) and age- and sex-matched controls. METHODS: A retrospective study design provided 40 UR (>35 years old; mean ± SD training experience, 18 ± 12 years) and 24 sedentary controls who had previously undergone conventional two-dimensional, tissue Doppler and speckle-tracking echocardiography to measure RV size and function...
January 3, 2018: Journal of the American Society of Echocardiography
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