keyword
MENU ▼
Read by QxMD icon Read
search

Tissue doppler imaging

keyword
https://www.readbyqxmd.com/read/28095914/vascular-mapping-of-the-retroauricular-skin-proposal-for-a-posterior-superior-surgical-incision-for-transcutaneous-bone-conduction-hearing-implants
#1
Adam Perenyi, Zsofia Bere, Janos Jarabin, Balazs Sztano, Edit Kukla, Ziad Bikhazi, Laszlo Tiszlavicz, Ferenc Toth, Jozsef Geza Kiss, Laszlo Rovo
BACKGROUND: Passive transcutaneous osseointegrated hearing implant systems have become increasingly popular more recently. The area over the implant is vulnerable due to vibration and pressure from the externally worn sound processor. Good perfusion and neural integrity has the potential to reduce complications. The authors' objective was to determine the ideal surgical exposure to maintain perfusion and neural integrity and decrease surgical time as a result of reduced bleeding. METHODS: The vascular anatomy of the temporal-parietal soft tissue was examined in a total of 50 subjects...
January 17, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28090794/novel-sluggish-speed-signs-on-ultrasound-is-indicative-of-hemangiomas
#2
Taisuke Furuta, Shoji Shimose, Yuko Nakashima, Tadahiko Kubo, Mitsuo Ochi
Background Hemangiomas are sometimes difficult to diagnose with current techniques. Sluggish speed signs (SSS) are a phenomenon that: (i) cannot be depicted as Doppler flow on Doppler ultrasound; (ii) can be observed as fluid movements on Doppler ultrasound; and (iii) cannot be depicted as waveforms on pulse Doppler mode. We hypothesized that SSS could be diagnostic indicators for hemangiomas. Purpose To evaluate whether ultrasound findings, in particular those relating to SSS, are a reliable tool for detecting hemangiomas compared to magnetic resonance imaging (MRI) and the gold standard for hemangioma diagnosis: pathological examination by biopsy or after surgical resection...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28090255/clinical-utility-of-echocardiography-for-the-diagnosis-and-prognosis-in-children-with-bronchopulmonary-dsyplasia
#3
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
https://www.readbyqxmd.com/read/28078225/testicular-compartment-syndrome-an-overview-of-pathophysiology-etiology-evaluation-and-management
#4
REVIEW
Jason Gandhi, Gautam Dagur, Yefim R Sheynkin, Noel L Smith, Sardar Ali Khan
Testicular compartment syndrome (TCS) refers to the impairment of microcirculation in the testicle due to either increased venous resistance or extraluminal compression, which leads to hypoxia. TCS releases oxidants through hypoxia and ischemia/reperfusion injury (IRI). The pathophysiology, etiology, evaluation, and management of TCS are reviewed. Based on the properties of TCS, specific causes, e.g., varicocele, hydrocele, orchitis, cryptorchidism, and scrotal hernia, are suggested and categorized. The oxidant-induced stress from TCS may explain the correlations between these causes and infertility...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28072580/in-vivo-real-time-cavitation-imaging-in-moving-organs
#5
B Arnal, J Baranger, C Demene, M Tanter, M Pernot
The stochastic nature of cavitation implies visualization of the cavitation cloud in real-time and in a discriminative manner for the safe use of focused ultrasound therapy. This visualization is sometimes possible with standard echography, but it strongly depends on the quality of the scanner, and is hindered by difficulty in discriminating from highly reflecting tissue signals in different organs. A specific approach would then permit clear validation of the cavitation position and activity. Detecting signals from a specific source with high sensitivity is a major problem in ultrasound imaging...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28070749/an-automated-microemboli-detection-and-classification-system-using-backscatter-rf-signals-and-differential-evolution
#6
Karim Ferroudji, Nabil Benoudjit, Ayache Bouakaz
Embolic phenomena, whether air or particulate emboli, can induce immediate damages like heart attack or ischemic stroke. Embolus composition (gaseous or particulate matter) is vital in predicting clinically significant complications. Embolus detection using Doppler methods have shown their limits to differentiate solid and gaseous embolus. Radio-frequency (RF) ultrasound signals backscattered by the emboli contain additional information on the embolus in comparison to the traditionally used Doppler signals...
January 9, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28067629/standardized-echocardiographic-assessment-of-cardiac-function-in-normal-adult-zebrafish-and-heart-disease-models
#7
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/28063644/are-transient-and-shear-wave-elastography-useful-tools-in-gaucher-disease
#8
Muriel Webb, Ari Zimran, Tama Dinur, Oren Shibolet, Stella Levit, David M Steinberg, Ophira Salomon
Up to now, there are no reliable biochemical markers or imaging that could reveal early tissue damage in Gaucher disease. Therefore, we addressed whether elastography technique can serve as a tool for evaluating patients with Gaucher disease. The study included 42 patients with Gaucher disease type I and 33 patients with liver cirrhosis as well as 22 healthy volunteers. Ultrasound and Doppler examination was performed on each participant prior to apply transient and 2D shear wave elastography. In Gaucher disease the median stiffness of the spleen as assessed by transient elastography (TE) and shear wave elastography (SWE) was 35KPa and 22KPa respectively in contrast to the median stiffness of healthy controls (16...
December 23, 2016: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28059556/effects-of-genital-response-measurement-device-and-stimulus-characteristics-on-sexual-concordance-in-women
#9
Katrina N Bouchard, Meredith L Chivers, Caroline F Pukall
Investigations of sexual concordance suggest that, on average, women exhibit a low, positive correlation between their subjective sexual arousal and genital response. However, this relationship appears to be stronger, on average, when genital response is measured via the external tissues of the vulva than within the vagina walls. Given the methodological variations, such as stimulus content and duration, in studies of vulvar and vaginal concordance, direct comparisons between individual studies are limited...
January 6, 2017: Journal of Sex Research
https://www.readbyqxmd.com/read/28047007/we-de-bra-03-construction-of-an-ultrasound-guidance-platform-for-image-guided-radiotherapy-with-the-intent-to-treat-transitional-cell-carcinoma
#10
J Sick, N Rancilio, C Fulkerson, P LaPetina, J Poulson, D Knapp, K Stantz
PURPOSE: Ultrasound (US) is a noninvasive, nonradiographic imaging technique with high spatial and temporal resolution that can be used for localizing soft-tissue structures and tumors in real-time during radiotherapy (inter- and intra-fraction). A detailed methodology integrating 3D-US within RT is presented. This method is easier to adopt into current treatment protocol than current US based systems and reduces user variability for image acquisition, thus eliminating transducer induced changes that limit CT planning system...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046050/postsystolic-shortening-is-associated-with-altered-right-ventricular-function-in-children-after-tetralogy-of-fallot-surgical-repair
#11
Radosław Pietrzak, Bożena Werner
: The aim of the study was to determine whether segmental interactions, as expressed by postsystolic shortening (PSS), affects RV mechanics and are connected with impaired systolic and diastolic function in rTOF children. PATIENTS AND METHODS: 55 rTOF adolescent (study group), and 34 healthy volunteers (control group) were examined using classical Doppler flow (Doppler), Tissue Doppler Imaging (TDI) and Speckle Tracking Echocardiography (STE). PSS was found to occur when time to peak (TTP) was longer than pulmonary valve closure time (PVCT)...
2017: PloS One
https://www.readbyqxmd.com/read/28045414/evaluation-of-left-atrial-mechanical-function-and-atrial-conduction-abnormalities-in-patients-with-isolated-bicuspid-aortic-valve
#12
Arif Arısoy, Kadriye Memiç, Selami Demirelli, Kayıhan Karaman, Fatih Altunkaş, Metin Karayakalı, Yusuf Karavelioğlu, Ataç Çelik
OBJECTIVE: Present study is an evaluation of left atrial (LA) mechanical and conduction function in patients with bicuspid aortic valve (BAV) without significant valve dysfunction, and an investigation of relationship between LA function and aortic elasticity. METHODS: Study population consisted of 34 isolated BAV patients (mean age: 34±13 years) and 29 healthy, age- and sex-matched volunteers (mean age: 30±10 years). LA volume was measured using biplane area-length method and LA active and passive emptying volume and fraction was calculated...
December 2016: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28039210/relationship-between-tissue-doppler-measurements-of-left-ventricular-diastolic-function-and-silent-brain-infarction-in-patients-with-non-valvular-atrial-fibrillation
#13
Sera Ishikawa, Kenichi Sugioka, Shinichi Sakamoto, Suwako Fujita, Asahiro Ito, Naoki Norioka, Shinichi Iwata, Masashi Nakagawa, Masahiko Takagi, Yukio Miki, Makiko Ueda, Minoru Yoshiyama
AIMS: Left ventricular (LV) diastolic function assessed by tissue Doppler imaging (TDI) is reported to be associated with left atrial (LA) blood stasis in patients with non-valvular atrial fibrillation (AF). This study aimed to evaluate the relationship of diastolic TDI parameters with silent brain infarction (SBI) on brain magnetic resonance imaging (MRI), and in turn the risks of subsequent stroke or dementia, in non-valvular AF patients. METHODS AND RESULTS: The study population consisted of 171 neurologically asymptomatic patients with non-valvular AF who underwent transoesophageal echocardiography (TOE) (128 men; mean age, 63 ± 11 years)...
December 29, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28033625/-analysis-of-critically-perfused-tissues-by-laser-speckle-contrast-analysis-lasca-perfusion-imaging
#14
A Limbourg, C Radtke, R Ipaktchi, P M Vogt
Background: The success of tissue transplantation and long-term tissue stability after wound healing depends on sufficient tissue perfusion. Laser Doppler-supported procedures allow for an objective measurement of relative tissue perfusion. The development of Speckle-based Laser Doppler imaging now enables a real-time representation of tissue perfusion. The perfusion of tissues relevant in plastic surgery such as scars, phalangeal replantations and burn wounds were systematically analysed by Laser Speckle Contrast Analysis (LASCA) imaging...
December 2016: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28029641/angiogenic-imbalance-and-residual-myocardial-injury-in-recovered-peripartum-cardiomyopathy-patients
#15
Sorel Goland, Jean Marc Weinstein, Adi Zalik, Rafael Kuperstein, Liaz Zilberman, Sara Shimoni, Michael Arad, Tuvia Ben Gal, Jacob George
BACKGROUND: Recent studies suggest that angiogenic imbalance during pregnancy may lead to acute peripartum cardiomyopathy (PPCM). We propose that angiogenic imbalance and residual cardiac dysfunction may exist even after recovery from PPCM. METHODS AND RESULTS: Twenty-nine women at least 12 months after presentation with PPCM, who exhibited recovery of left ventricular (LV) ejection fraction (≥50%), were included in the study (mean age 35±6 years, LV ejection fraction 61...
November 2016: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28024925/the-evolution-of-diastolic-function-during-liver-transplantation
#16
Pauline Devauchelle, Zoé Schmitt, Aurélie Bonnet, Serge Duperret, Jean-Paul Viale, Jean-Yves Mabrut, Frédéric Aubrun, Mathieu Gazon
INTRODUCTION: The peroperative management of liver transplantation is still associated with many cardio-circulatory complications in which diastolic dysfunction may play a contributive role. Transoesophageal echocardiography is a monitoring device commonly used in liver transplantation allowing diastolic function assessment. METHODS: We prospectively analysed the peroperative transoesophageal echocardiography recordings of 40 patients undergoing liver transplantation in order to describe changes in diastolic function at different steps of the surgery...
December 23, 2016: Anaesthesia, Critical Care & Pain Medicine
https://www.readbyqxmd.com/read/28013283/delayed-and-decreased-lv-untwist-and-unstrain-rate-in-mutation-carriers-for-hypertrophic-cardiomyopathy
#17
Floris Kauer, Bas M van Dalen, Michelle Michels, Arend F L Schinkel, Wim B Vletter, Marjon van Slegtenhorst, Osama I I Soliman, Marcel L Geleijnse
BACKGROUND: The echocardiographic focus to detect abnormalities in genetically hypertrophic cardiomyopathy (HCM) affected subjects without left ventricular (LV) hypertrophy (G+/LVH-) has been on diastolic abnormalities in transmitral flow and longitudinal myocardial function with tissue Doppler imaging. The aim of this study was to assess diastolic LV unstrain and untwist. METHODS AND RESULTS: Forty-one consecutive genotyped family members of HCM patients (mean age 37 ± 11 years, 16 men) and 41 age- and gender-matched healthy volunteers underwent speckle-tracking echocardiography to measure untwist and unstrain...
December 24, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28004817/assessment-of-myocardial-function-in-elite-athlete-s-heart-at-rest-2d-speckle-tracking-echocardiography-in-korean-elite-soccer-players
#18
Lucy Youngmin Eun, Hyun Wook Chae
The purpose of this study was to investigate Korean elite soccer players' myocardial function using the conventional and advanced speckle tracking imaging to compare the difference with the normal controls. We used 2D echocardiography speckle tracking echocardiography (STE) to evaluate LV regional strain in 29 elite soccer players compared to 29 age-matched healthy controls. Conventional, tissue Doppler, and STI echocardiography was performed, for strain at base and apex, rotation and torsion. There is no difference in longitudinal strain (-17...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28001041/ultrasound-responsive-macrophase-segregated-microcomposite-films-for-in-vivo-biosensing
#19
Jian Yang, James Wang, Casey N Ta, Erin Ward, Christopher V Barback, Tsai-Wen Sung, Natalie Mendez, Sarah L Blair, Andrew C Kummel, William C Trogler
Ultrasound imaging is a safe, low-cost, and in situ method for detecting in vivo medical devices. A poly(methyl-2-cyanoacrylate) film containing 2 μm boron-doped, calcined, porous silica microshells was developed as an ultrasound imaging marker for multiple medical devices. A macrophase separation drove the gas-filled porous silica microshells to the top surface of the polymer film by controlled curing of the cyanoacrylate glue and the amount of microshell loading. A thin film of polymer blocked the wall pores of the microshells to seal air in their hollow core, which served as an ultrasound contrast agent...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27995291/assessing-myocardial-function-in-infants-with-pulmonary-hypertension-the-role-of-tissue-doppler-imaging-and-tricuspid-annular-plane-systolic-excursion
#20
Chalese Richardson, Cynthia Amirtharaj, Dorota Gruber, Denise A Hayes
Transthoracic echocardiography is the most common noninvasive method of evaluating pulmonary hypertension (PH) in infants. Identification of reliable, quantitative indices of myocardial function may enhance the diagnostic value of echocardiography in this population. We hypothesized that pulsed wave tissue Doppler imaging (TDI) and tricuspid annular plane systolic excursion (TAPSE) would be reproducible measurements and would suggest decreased ventricular function, in infants with PH. This retrospective case-control study involved subjects diagnosed clinically and echocardiographically with PH at <12 months of age, matched with controls by age and gestational age (GA)...
December 19, 2016: Pediatric Cardiology
keyword
keyword
53673
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"