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Tissue doppler imaging

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https://www.readbyqxmd.com/read/28229822/myocardial-performance-index-in-active-and-inactive-paediatric-systemic-lupus-erythematosus
#1
Anant Khositseth, Wasana Prangwatanagul, Kanchana Tangnararatchakit, Soamarat Vilaiyuk, Nantawan Su-Angka
OBJECTIVES: To evaluate cardiac structure and function in paediatric SLE patients without clinical evidence of cardiovascular disease in active and inactive diseases. METHODS: Patients aged ≤20 years who fulfilled the diagnostic criteria of active SLE underwent transthoracic echocardiography to evaluate cardiac structure and function, and were then followed up echocardiographically every 3-4 months until SLE disease was inactive. Patients with heart failure, myocarditis, pericarditis, endocarditis, coronary artery disease, or abnormal structural heart disease were excluded...
February 3, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28229273/effect-of-exercise-on-diastolic-function-in-heart-failure-patients-a-systematic-review-and-meta-analysis
#2
REVIEW
M J Pearson, S F Mungovan, N A Smart
Diastolic dysfunction contributes to the development and progression of heart failure. Conventional echocardiography and tissue Doppler imaging are widely utilised in clinical research providing a number of indices of diastolic function valuable in the diagnosis and prognosis of heart failure patients. The aim of this meta-analysis was to quantify the effect of exercise training on diastolic function in patients with heart failure. Exercise training studies that investigate different indices of diastolic function in patients with heart failure have reported that exercise training improves diastolic function in these patients...
February 23, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28228820/temperature-elevation-measured-in-a-tissue-mimicking-phantom-for-transvaginal-ultrasound-at-clinical-settings
#3
Piero Miloro, Eleanor Martin, Adam Shaw
INTRODUCTION: This paper reports the results of an audit to assess the possible thermal hazard associated with the clinical use of ultrasound scanners in UK Hospitals for transvaginal ultrasound imaging. METHODS: An anatomically relevant phantom composed of a block of agar-based tissue mimicking material with embedded thermal sensors was developed. Seventeen hospitals around the UK were visited and a total of 64 configurations were tested. A representative typical scanning protocol was adopted, which primarily used B-mode with 30 s periods of colour-flow and pulsed Doppler modes for both gynaecology and obstetrics pre-sets...
February 2017: Ultrasound: Journal of the British Medical Ultrasound Society
https://www.readbyqxmd.com/read/28228367/blockade-of-hmgb1-preserves-vascular-homeostasis-and-improves-blood-perfusion-in-rats-of-acute-limb-ischemia-reperfusion
#4
Yang Liu, Changyou Zhou, Jianjun Jiang, Qingbo Su, Xiangjiu Ding
Acute limb ischemia is one of the most common peripheral arterial disease, while surgical restoration of blood flow often results in ischemia/reperfusion (I/R) injury. Our previous study revealed the inflammation intensity in arterial tissue, characterized by expression of high mobility group box protein 1 (HMGB1), was contrary to the fluctuation of hemodynamics in reperfusion limbs in a rat model. This study meant to clarify the role of HMGB1 during this process. Laser Doppler perfusion imaging evaluated limb hemodynamics in mean and max perfusion unit (PU)...
February 19, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28226918/gyrocardiography-a-new-non-invasive-approach-in-the-study-of-mechanical-motions-of-the-heart-concept-method-and-initial-observations
#5
Mojtaba Jafari Tadi, Eero Lehtonen, Mikko Pankaala, Antti Saraste, Tuija Vasankari, Mika Teras, Tero Koivisto, Mojtaba Jafari Tadi, Eero Lehtonen, Mikko Pankaala, Antti Saraste, Tuija Vasankari, Mika Teras, Tero Koivisto, Eero Lehtonen, Mojtaba Jafari Tadi, Mika Teras, Antti Saraste, Tuija Vasankari, Mikko Pankaala, Tero Koivisto
The pumping action of the heart is performed by contraction of the myocardium fibers. We present a non-invasive technique named gyrocardiography (GCG) that comprises a sensor of angular motion, gyroscope, configured to obtain three-dimensional angular velocity signals. A tri-axial micro electromechanical (MEMS) gyroscope sensor was attached to the surface of the chest to obtain gyrocardiogram. Color-coded Doppler tissue imaging (DTI) was recorded simultaneously and synchronized with the GCG in an off-line analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225712/left-ventricular-function-and-exercise-performance-in-idiopathic-dilated-cardiomyopathy-role-of-tissue-doppler-imaging
#6
Elena Zambon, Annamaria Iorio, Concetta Di Nora, Cosimo Carriere, Elena Abate, Marco Merlo, Giulia Barbati, Andrea Di Lenarda, Bruno Pinamonti, Piergiuseppe Agostoni, Gianfranco Sinagra
BACKGROUND: To examine the relationship between left ventricular (LV) function evaluated at echocardiography and exercise performance in idiopathic dilated cardiomyopathy (IDCM) patients. METHODS AND RESULTS: We enrolled 76 consecutive IDCM patients in sinus rhythm, undergoing cardiopulmonary exercise testing and echocardiography [49 ± 13 years old; LV ejection fraction 31 ± 7%, LV end-diastolic volume 96 ± 31 ml/m; peak oxygen consumption (peak VO2/kg) 18 ± 5...
April 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28224726/a%C3%A4-rway-and-sleep-d%C3%A4-sorders-%C3%A4-n-pat%C3%A4-ents-w%C3%A4-th-acromegaly
#7
Onur Turan, Barış Akıncı, Ahmet Omer Ikız, Oya Itıl, Ibrahim Oztura, Emel Ada, Bahri Akdenız, Serkan Yener, Murat Kaya, Arzu Gedık, Abdurrahman Comlekcı
INTRODUCTION-OBJECTIVE: Acromegaly is a multisystemic disorder caused by excessive secretion of growth hormone (GH). Sleep-disordered breathing (SDB) such as sleep apnea syndrome (SAS) may occur in acromegaly. The aim of study was to assess the presence of sleep disorders and evaluate the systemic complications on respiratory, cardiovascular and upper airway systems in acromegalic patients. METHODS: The study group consisted of 30 acromegaly outpatients. GH and insulin-like growth factor 1 (IGF-1) measurements were obtained; body pletysmography, arterial blood gas analysis,tissue-doppler imaging,echocardiography,polysomnography,otorhinolaryngologic examination and head-neck computed tomography were performed...
February 22, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28221297/optimal-epinephrine-concentration-and-time-delay-to-minimize-perfusion-in-eyelid-surgery-measured-by-laser-based-methods-and-a-novel-form-of-extended-wavelength-diffuse-reflectance-spectroscopy
#8
Rafi Sheikh, Ulf Dahlstrand, Khashayar Memarzadeh, Jonas Blohmé, Nina Reistad, Malin Malmsjö
OBJECTIVE: This study investigates the hypoperfusion effects of epinephrine in local anesthesia in eyelid surgery. A novel form of extended-wavelength diffuse reflectance spectroscopy was evaluated. METHODS: Blood perfusion in porcine eyelid flaps was measured using laser Doppler velocimetry and laser speckle contrast imaging, whereas the tissue response was measured using diffuse reflectance spectroscopy with a broad spectrum (450-1550 nm). Epinephrine was either injected cumulatively, 0...
February 17, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28220275/open-source-vendor-independent-automated-multi-beat-tissue-doppler-echocardiography-analysis
#9
Niti M Dhutia, Massoud Zolgharni, Michael Mielewczik, Madalina Negoita, Stefania Sacchi, Karikaran Manoharan, Darrel P Francis, Graham D Cole
Current guidelines for measuring cardiac function by tissue Doppler recommend using multiple beats, but this has a time cost for human operators. We present an open-source, vendor-independent, drag-and-drop software capable of automating the measurement process. A database of ~8000 tissue Doppler beats (48 patients) from the septal and lateral annuli were analyzed by three expert echocardiographers. We developed an intensity- and gradient-based automated algorithm to measure tissue Doppler velocities. We tested its performance against manual measurements from the expert human operators...
February 20, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28219803/maintaining-unperturbed-cerebral-blood-flow-is-key-in-the-study-of-brain-metastasis-and-its-interactions-with-stress-and-inflammatory-responses
#10
Benbenishty Amit, Segev-Amzaleg Niva, Shaashua Lee, Melamed Rivka, Ben-Eliyahu Shamgar, Blinder Pablo
Blood-borne brain metastases are associated with poor prognosis, but little is known about the interplay between cerebral blood flow, surgical stress responses, and the metastatic process. The intra-carotid inoculation approach, traditionally used in animal studies, involves permanent occlusion of the common carotid artery (CCA). Herein we introduce a novel intra-carotid inoculation approach that avoids CCA ligation, namely - assisted external carotid artery inoculation (aECAi) - and compared it to the traditional approach in C57/BL6 mice, assessing cerebral blood flow; particle distribution; blood-brain barrier (BBB) integrity; stress, inflammatory and immune responses; and tumor brain retention and growth...
February 17, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28203503/prostaglandin-e1-increases-microcirculation-in-random-pattern-flaps-on-rats-measured-with-laser-doppler-perfusion-imaging
#11
Kim Alexander Tønseth, Christian Sneistrup, Thomas Moe Berg
BACKGROUND: Reconstructive procedures with pedicled and free flaps are associated with a risk of ischemia. Prostaglandin E1 (PGE1) is a hormone-like substance with known antiischemic and tissue-protective effects. The aim of this study was to evaluate the effect of PGE1 on the microcirculation in random pattern skin flaps on rats. METHODS: Twenty-four rats were divided into 2 groups: an intervention group given PGE1 for 6 hours and a control group given saline. The flap (2 × 10 cm) was created on the back of the rats, and the microcirculation was monitored with laser Doppler perfusion imaging in 5 different zones (1, proximal; 5, distal) before surgery and after 60, 180, and 360 minutes postoperatively...
January 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28197645/subclinical-decrease-in-myocardial-function-in-asymptomatic-infants-of-diabetic-mothers-a-tissue-doppler-study
#12
Jenny E Zablah, Dorota Gruber, Guillaume Stoffels, Estefania G Cabezas, Denise A Hayes
Infants of diabetic mothers (IDMs) with hypertrophic cardiomyopathy are recognized to have impaired myocardial performance, but less is known about ventricular function in IDMs without hypertrophy. We hypothesized that in asymptomatic newborns with normal two-dimensional echocardiographic evaluations, pulsed wave tissue Doppler imaging (TDI) would suggest a subclinical decrease in the cardiac function of IDMs compared to infants of non-diabetics (nIDMs). This is a retrospective cohort study of asymptomatic neonates ≥36 weeks gestation, at 0-7 days of life, with normal standard echocardiograms...
February 14, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28197282/fragmented-qrs-as-a-marker-of-electrical-dyssynchrony-to-predict-inter-ventricular-conduction-defect-by-subsequent-echocardiographic-assessment-in-symptomatic-patients-of-non-ischemic-dilated-cardiomyopathy
#13
Santosh Kumar Sinha, Kush Bhagat, Mohammad Asif, Karandeep Singh, Mohit Sachan, Vikas Mishra, Nasar Afdaali, Mukesh Jitendra Jha, Ashutosh Kumar, Shravan Singh, Rupesh Sinha, Dibbendhu Khanra, Ramesh Thakur, Chandra Mohan Varma, Vinay Krishna, Umeshwar Pandey
BACKGROUND: Left ventricular (LV) dyssynchrony frequently occurs in patients with heart failure (HF). QRS ≥ 120 ms is a surrogate marker of electrical dyssynchrony, which occurs in only 30% of HF patients. In contrary, in those with normal QRS (nQRS) duration, LV dyssynchrony has been reported in 20-50%. This study was carried out to investigate the role of fragmented QRS (fQRS) on the surface electrocardiography (ECG) as a marker of electrical dyssynchrony to predict the presence of significant intraventricular dyssynchrony (IVD) by subsequent echocardiographic assessment...
August 2016: Cardiology Research
https://www.readbyqxmd.com/read/28191526/decreased-regional-left-ventricular-myocardial-strain-in-type-1-diabetic-children-a-first-sign-of-diabetic-cardiomyopathy
#14
Amir Hodzic, Virginie Ribault, Pascale Maragnes, Paul Milliez, Eric Saloux, Fabien Labombarda
BACKGROUND AND OBJECTIVES: Type 1 diabetes is a major cardiovascular risk factor associated with an excess of mortality in young adults due to premature cardiovascular events, which includes heart failure. The relation between type 1 diabetes and cardiac structure and function in children was poorly documented. Our study investigates (1) whether type 1 diabetic children have echocardiographic signs of subclinical cardiac dysfunction assessed by tissue Doppler strain and (2) whether state of metabolic control and diabetes duration have any influence on the cardiac event...
June 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28181179/clinical-examination-ultrasound-and-mri-imaging-of-the-painful-elbow-in-psoriatic-arthritis-and-rheumatoid-arthritis-which-is-better-ultrasound-or-mr-for-imaging-enthesitis
#15
Clare Groves, Muthusamy Chandramohan, Ne Siang Chew, Tariq Aslam, Philip S Helliwell
INTRODUCTION: The purpose of the current study was to examine the painful elbow, and in particular enthesitis, in psoriatic arthritis (PsA) and rheumatoid arthritis (RA) using clinical examination, ultrasonography (US) and magnetic resonance imaging (MRI). METHODS: Patients with elbow pain (11 with PsA and 9 with RA) were recruited. Clinical examination, US and MRI studies were performed on the same day. For enthesitis, the common extensor and flexor insertions and the triceps insertion were imaged (20 patients, giving a total of 60 sites with comparative data)...
February 8, 2017: Rheumatology and Therapy
https://www.readbyqxmd.com/read/28180206/multiple-cardiac-complications-after-adjuvant-therapy-for-breast-cancer-the-importance-of-echocardiography-a-case-report-and-review-of-the-literature
#16
Adriana Luminita Gurghean, Ilinca Savulescu-Fiedler, Anca Mihailescu
Cardiovascular complications induced by adjuvant cancer therapies may become symptomatic after many years, being responsible for increased morbidity and mortality in long-term survivors. We report a case of a 54-year old female admitted for severe heart failure induced by myocardial and valvular damage after postoperative adjuvant therapy for left breast cancer 6 years ago. Her recent history revealed nonST elevation myocardial infarction in the absence of significant cardiovascular risk factors. Transthoracic echocardiography, tissue Doppler imaging and speckle-tracking imaging revealed severe biventricular systolic dysfunction, severe mitral and tricuspid regurgitation and severe pulmonary hypertension...
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28168740/decreased-biventricular-longitudinal-strain-shortly-after-congenital-heart-defect-surgery
#17
Jonne M de Boer, Irene M Kuipers, Liselotte M Klitsie, Nico A Blom, Arend D J Ten Harkel
OBJECTIVE: Impaired ventricular performance in patients who underwent surgery for congenital heart defect (CHD) may ultimately result in clinical heart failure. It is therefore important to regularly evaluate the left ventricular (LV) and right ventricular (RV) performance. We evaluated tissue Doppler imaging (TDI) and speckle tracking echocardiography (STE) before and after surgical correction of a CHD. STUDY DESIGN: Patients with CHD undergoing biventricular corrective surgery were included in this retrospective study...
February 6, 2017: Echocardiography
https://www.readbyqxmd.com/read/28162963/assessment-of-the-atrial-electromechanical-properties-of-patients-with-human-immunodeficiency-virus
#18
Ahmet G Ertem, Çağrı Yayla, Burak Açar, Sefa Ünal, Mehmet A Erdol, Meliha Ç Sonmezer, Esra Kaya Kiliç, Çiğdem Ataman Hatipoglu, Serkan Gokaslan, Habibe Kafes, Mehmet K Akboga, Pelin Aladag, Koray Demirtas, Sinan Aydogdu
The relationship between atrial fibrillation and human immunodeficiency virus (HIV) infection was evaluated. Electro-echocardiographic methods can be used to predict the development of atrial fibrillation (AF). In this study, we aimed to investigate the atrial electromechanical delay (AEMD) parameters of HIV (+) patients. Forty-two HIV (+) patients and 40 HIV (-) healthy volunteers were prospectively enrolled in this study. The electromechanical properties of the subjects' atria were evaluated with tissue Doppler imaging...
February 2, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28151726/2-d-multi-frequency-imaging-of-a-tumor-inclusion-in-homogeneous-breast-phantom-using-harmonic-motion-doppler-imaging-method
#19
Azadeh Kamali Tafreshi, Can Top, Nevzat Gencer
Harmonic Motion Microwave Doppler Imaging (HMMDI) is a novel imaging modality to image the coupled electrical and mechanical properties of body tissues. In this paper, we used two experimental systems with different receiver configurations to obtain HMMDI images from tissue mimicking phantoms at multiple vibration frequencies between 15 Hz and 35 Hz. In the first system, we used a spectrum analyzer to obtain the Doppler data in frequency domain, while in the second one, we used a homodyne receiver that was designed to acquire time domain data...
February 2, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28142366/benign-peripheral-nerve-sheath-tumor-in-a-distance-runner
#20
Laura E Stanley, David J Berkoff
A 31-year-old female runner presented to physical therapy via direct access with an 8-month history of atraumatic left lateral calf pain. Following 1 month of physical therapy, the patient was referred to an orthopaedic sports medicine physician. Ultrasound imaging revealed a 2-cm hypoechoic mass with well-defined margins in the left proximal lateral soleus, while Doppler ultrasound demonstrated increased color flow surrounding the mass. Magnetic resonance imaging findings were consistent with a nerve sheath tumor, and ultrasound-guided tissue biopsy determined the mass to be a benign peripheral nerve sheath tumor...
February 2017: Journal of Orthopaedic and Sports Physical Therapy
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