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Resistive index doppler

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https://www.readbyqxmd.com/read/28103361/the-relationship-between-body-composition-and-renal-resistive-index-in-new-diagnosed-hypertensive-patients
#1
S Karakan, B Inan, A Aktas, H Yavuz
Objective: Obesity is a major modifiable risk factor for atherosclerosis. Thus, early risk markers are needed to identify obese subjects. The objective of this study was to examine the relationship between body composition and arterial stiffness documented by Doppler-derived renal resistive index (RRI). Materials/Subjects and Methods: We enrolled 120 new-diagnosed hypertensive patients (mean age 45±8 years) who were admitted to our nephrology clinic. Body fat percentage (BFP) was measured by bioelectrical impedance (BIA)...
February 18, 2016: West Indian Medical Journal
https://www.readbyqxmd.com/read/28091544/ultrasound-prediction-of-abnormal-infant-development-in-hypertensive-pregnant-women-in-the-second-and-third-trimester
#2
Guofang Shen, Yajuan Huang, Lixin Jiang, Jinghong Gu, Yaxin Wang, Bing Hu
The objective was to assess the sensitivities and accuracies of Doppler ultrasound parameters in the second and third trimester of hypertensive pregnancies in determining perinatal outcomes. 1,054 pregnancies were retrospectively categorized into three groups (healthy pregnancies (HP, n = 988), pregnancies of hypertensive women (HypP, n = 30) and high-risk hypertension pregnancies (HRHypP, n = 36), depending on gestational hypertension as well as fetal birth weights and pregnancy outcomes. Systolic/diastolic ratio (S/D), resistance index (RI), pulsatility index (PI) of the bilateral uterine artery, umbilical artery and vein as well as venous flow velocity data were monitored by Doppler ultrasound...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28081326/the-effect-of-deep-sclerectomy-on-ocular-blood-flow-a-6-month-clinical-trial
#3
Arzu Özsoy, Murat Sinan Sarıcaoğlu, Mehtap Çavuşoğlu
BACKGROUND/AIM: To investigate the effect of deep sclerectomy on retrobulbar blood flow. MATERIALS AND METHODS: This prospective study included 20 eyes of 20 patients with open angle glaucoma. Color Doppler imaging (CDI) examinations were performed before and 2, 12, and 24 weeks after deep sclerectomy. Peak systolic velocity (PSV), end diastolic velocity (EDV), and resistance index (RI) were measured for the ophthalmic artery (OA), central retinal artery (CRA), and temporal and nasal short posterior ciliary arteries (SPCAs) at each examination and the results were compared...
December 20, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28043350/evaluation-of-changes-in-doppler-ultrasonography-indices-and-levels-of-maternal-serum-angiogenic-factors-throughout-pregnancy-in-ewes
#4
Özge Turna Yilmaz, Mehmet Can Gündüz, Gamze Evkuran Dal, Melih Uçmak, Zeynep Günay Uçmak, Esra Karaçam, Güven Kaşikçi, Mehmet Ragip Kiliçarslan
We evaluated the changes in the pulsatility index (PI) and resistance index (RI) of fetal and maternal vessels and maternal serum angiogenic factors throughout pregnancy in 20 Kivircik ewes. They were examined for pregnancy detection on Day 30 after mating. The PI and RI during the pregnancies were followed using Doppler ultrasonography (USG) of the uterine artery, umbilical artery, fetal aorta, and fetal vena cava. Doppler USG was performed every 15 days beginning from the 40th day after mating. Blood samples were collected every 15 days starting from the day of mating...
February 2017: Theriogenology
https://www.readbyqxmd.com/read/28040130/correlation-of-kisspeptin-10-level-and-fetal-well-being-in-preeclamptic-patients
#5
Maysoun A Ziyaraa, Farqad B Hamdan, Liqaa R Mousa
OBJECTIVE: This study aims to evaluate the role of kisspeptin-10 in preeclampsia and check for possible relationship between its severity and fetal growth well-being. Kisspeptin-10 may participate in implantation of the embryo, placenta formation, and maintenance of pregnancy. MATERIALS AND METHODS: One hundred women who completed 20 weeks of gestation with singleton pregnancies were divided into 60 peeclamptic and 40 normotensive control women. Kisspeptin-10 level estimation, and ultrasound and Doppler ultrasound studies for umbilical artery were performed during their second and third trimesters of pregnancy...
December 2016: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28038968/combined-use-of-serum-mcp-1-il-10-ratio-and-uterine-artery-doppler-index-significantly-improves-the-prediction-of-preeclampsia
#6
Shihong Cui, Yanan Gao, Linlin Zhang, Yuan Wang, Lindong Zhang, Pingping Liu, Ling Liu, Juan Chen
BACKGROUND: Monocyte chemotactic protein-1 (MCP-1, or CCL2) is a member of the chemokine subfamily involved in recruitment of monocytes in inflammatory tissues. IL-10 is a key regulator for maintaining the balance of anti-inflammatory and pro-inflammatory milieu at the feto-maternal interface. Doppler examination has been routinely performed for the monitoring and management of preeclampsia patients. This study evaluates the efficiency of these factors alone, or in combination, for the predication of preeclampsia...
December 27, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28029703/the-sonographic-stenosis-index-a-new-specific-quantitative-measure-of-transplant-hepatic-arterial-stenosis
#7
Thomas X Le, Daniel S Hippe, Michael F McNeeley, Manjiri K Dighe, Theodore J Dubinsky, Sherwin S Chan
OBJECTIVES: This study evaluates the sensitivity and specificity of stenosis index (SI), which accounts for the entire spectral Doppler waveform, to detect significant transplant hepatic arterial stenosis. MATERIALS AND METHODS: In this institutional review board-approved, HIPAA compliant study, we retrospectively analyzed 69 patients who had catheter angiography for suspected transplant hepatic arterial stenosis (THAS) between January 2006 and December 2010; all patients had Doppler ultrasound within 30 days before angiography...
December 28, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28026900/doppler-ultrasound-in-liver-cirrhosis-correlation-of-hepatic-artery-and-portal-vein-measurements-with-model-for-end-stage-liver-disease-score
#8
Hee Sun Park, Terry S Desser, R Brooke Jeffrey, Aya Kamaya
OBJECTIVES: To determine whether hepatic arterial and portal venous Doppler ultrasound measurements of the liver in cirrhotic patients correlate with patients' Model for End-Stage Liver Disease (MELD) scores, splenomegaly, or ascites. MATERIALS AND METHODS: Sonographic images and reports were reviewed of 264 patients with hepatic cirrhosis who underwent abdominal ultrasound with Doppler in this internal review board-approved retrospective study. MELD scores were recorded at the time of ultrasound...
December 27, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28024912/early-diagnosis-and-outcome-prediction-of-neonatal-hypoxic-ischemic-encephalopathy-with-color-doppler-ultrasound
#9
B Guan, C Dai, Y Zhang, L Zhu, X He, N Wang, H Liu
PURPOSE: To describe the ultrasound presentation of the brain and cerebral hemodynamics in neonates with hypoxic-ischemic encephalopathy (HIE) by comparison with control subjects. MATERIAL AND METHODS: During June 2012 to April 2013, full term neonates who had clinical evidence of HIE were enrolled. Healthy newborns without HIE were used as a control group. Cerebral parenchyma, size of lateral ventricles and hemodynamic parameters of cerebral arteries were studied using two-dimensional duplex and color Doppler ultrasound...
December 23, 2016: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/28017677/preoperative-renal-resistive-index-predicts-risk-of-acute-kidney-injury-in-patients-undergoing-cardiac-surgery
#10
Daniel Hertzberg, Simon L Ceder, Ulrik Sartipy, Kent Lund, Martin J Holzmann
OBJECTIVE: To investigate whether an elevated preoperative renal resistive index (RRI) predicts acute kidney injury (AKI) in patients undergoing cardiac surgery. DESIGN: Prospective cohort study. SETTING: University hospital. PARTICIPANTS: Cohort of 96 adult cardiac surgical patients. INTERVENTIONS: Resistive index was measurement the day before surgery. MEASUREMENTS AND MAIN RESULTS: Renal Doppler was used to measure the resistive index in renal cortical or arcuate arteries the day before surgery...
October 11, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28007742/invasive-minimal-microvascular-resistance-is-a-new-index-to-assess-microcirculatory-function-independent-of-obstructive-coronary-artery-disease
#11
Guus A de Waard, Sukhjinder S Nijjer, Martijn A van Lavieren, Nina W van der Hoeven, Ricardo Petraco, Tim P van de Hoef, Mauro Echavarría-Pinto, Sayan Sen, Peter M van de Ven, Paul Knaapen, Javier Escaned, Jan J Piek, Justin E Davies, Niels van Royen
BACKGROUND: Coronary microcirculatory dysfunction portends a poor cardiovascular outcome. Invasive assessment of microcirculatory dysfunction by coronary flow reserve (CFR) and hyperemic microvascular resistance (HMR) is affected by coronary artery disease (CAD). In this study we propose minimal microvascular resistance (mMR) as a new measure of microcirculatory dysfunction and aim to determine whether mMR is influenced by CAD. METHODS AND RESULTS: We obtained 482 simultaneous measurements of intracoronary Doppler flow velocity and pressure...
December 22, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28003891/arterial-resistance-in-late-first-trimester-as-a-predictor-of-subsequent-pregnancy-related-hypertension
#12
Pralhad Kushtagi, Anoosha Emani
OBJECTIVES: This study aimed to examine the association between indicators of arterial resistance occurring late in the first trimester and the subsequent development of pregnancy-related hypertension. METHODS: This study took place between May 2014 and August 2015 and included 329 consecutive women with singleton pregnancies attending the antenatal clinics of a medical college in Karnataka, India, during this period. Pulse pressure (PP) and uterine artery Doppler parameters were recorded between 11-14 gestational weeks...
November 2016: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/28003222/normal-reference-values-and-z-scores-of-the-pulmonary-artery-acceleration-time-in-children-and-its-importance-for-the-assessment-of-pulmonary-hypertension
#13
Martin Koestenberger, Gernot Grangl, Alexander Avian, Andreas Gamillscheg, Marlene Grillitsch, Gerhard Cvirn, Ante Burmas, Georg Hansmann
BACKGROUND: Pulsed-wave Doppler determination of the pulmonary artery acceleration time (PAAT) as a surrogate for pulmonary artery pressure was found to be of clinical value for assessment of pulmonary hypertension (PH) with studies to date exclusively performed in adults. This study aims to provide representative, normal reference values for PAAT in children of all ages. Moreover, we validated abnormal PAAT values in 54 children with PH. METHODS AND RESULTS: We conducted a prospective echocardiographic study in 756 healthy children (aged 1 day to 18 years) and in 54 children with PH...
January 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27998454/-study-on-correlation-between-retinal-vessel-morphology-or-ocular-hemodynamic-parameter-and-internal-carotid-artery-stenosis
#14
H Y Li, H Wang, X J Zhang, Y H Feng, Z C Wang, Y L Wang
Objective: To analyze the correlation between retinal vascular calibers, ocular blood flow parameters and internal carotid artery stenosis and to evaluate the effect of internal carotid artery stenosis on ocular blood vessels comprehensively. Methods: A retrospective case-control study. The clinical data of 141 patients who underwent head-and-neck computed tomography (CT) angiography examinations of the ICA were collected at Beijing Friendship Hospital, Capital Medical University from January 2014 to January 2016...
December 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27995383/ultrasound-resistive-index-power-doppler-and-clinical-parameters-in-established-rheumatoid-arthritis
#15
Melissa Cláudia Bisi, Aline Defaveri do Prado, Deise Marcela Piovesan, Markus Bredemeier, Inês Guimarães da Silveira, José Alexandre de Mendonça, Henrique Luiz Staub
Ultrasonography (US) is a useful tool for the evaluation of sinovial vascularization and proliferation in rheumatoid arthritis (RA). Accordingly, resistive index (RI) on spectral Doppler (sD) US provides a quantitative analysis of vascular inflammation, but its utility in the evaluation of RA activity has not been established. Our objective was to determine the association of RI with other US parameters of synovitis and with clinical disease activity in established RA. Patients with positive power Doppler (pD) were included in a prospective cross-sectional study...
December 19, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/27994601/the-renal-arterial-resistance-index-predicts-worsening-renal-function-in-chronic-heart-failure-patients
#16
Massimo Iacoviello, Francesco Monitillo, Marta Leone, Gaetano Citarelli, Annalisa Doronzo, Valeria Antoncecchi, Agata Puzzovivo, Caterina Rizzo, Maria Silvia Lattarulo, Francesco Massari, Pasquale Caldarola, Marco Matteo Ciccone
BACKGROUND/AIM: The renal arterial resistance index (RRI) is a Doppler measure, which reflects abnormalities in the renal blood flow. The aim of this study was to verify the value of RRI as a predictor of worsening renal function (WRF) in a group of chronic heart failure (CHF) outpatients. METHODS: We enrolled 266 patients in stable clinical conditions and on conventional therapy. Peak systolic velocity and end diastolic velocity of a segmental renal artery were obtained by pulsed Doppler flow, and RRI was calculated...
November 2016: Cardiorenal Medicine
https://www.readbyqxmd.com/read/27990593/is-the-unaffected-eye-really-unaffected-color-doppler-ultrasound-findings-in-unilaterally-active-central-serous-chorioretinopathy
#17
Iclal Erdem Toslak, Muhammet Kazim Erol, Devrim Toslak, Bulent Cekic, Mehtap Barc Ergun, Jennifer E Lim-Dunham
PURPOSE: To evaluate ocular hemodynamic changes using color Doppler ultrasonography imaging (CDI) with an emphasis on unaffected eyes of patients with central serous chorioretinopathy (CSC). METHODS: Twenty-seven patients with active CSC and 25 controls were analyzed using spectral domain-optical coherence tomography (SD-OCT) and CDI for choroidal imaging and evaluation of retrobulbar vessels, respectively. RESULTS: Resistive index (RI), pulsatility index (PI), and peak systolic velocity (PSV) of the ophthalmic artery (OA) and PSV, end-diastolic velocity (EDV), and mean velocity (Vmean) of the central retinal artery (CRA) in the patient group were less than those in the control group...
December 18, 2016: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/27984414/noninvasive-assessment-of-haemodynamics-in-resistant-hypertension-the-role-of-the-renal-resistive-index
#18
Konstantinos Kintis, Costas Tsioufis, Alexandros Kasiakogias, Kyriakos Dimitriadis, Dimitris Konstantinidis, Eirini Andrikou, Ioannis Andrikou, Sotirios Patsilinakos, Dimitris Petras, Demetrios Vlahakos, Dimitris Tousoulis
OBJECTIVE: The association of resistant hypertension (RHTN) with renal haemodynamics is unclear. Our aim was to evaluate differences in haemodynamic characteristics of patients with RHTN compared with patients with controlled hypertension (HTN) at the level of the heart, kidney and aorta. METHODS: We studied 50 patients with RHTN confirmed by ambulatory blood pressure monitoring and 50 controlled hypertensive patients matched for age and sex. All participants underwent renal Doppler ultrasound to determine the renal resistive index (RRI), a complete echocardiographic study including measurements of diastolic function and evaluation of augmentation index...
December 14, 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27966109/renal-ultrasound-and-doppler-sonography-in-hypertension-an-update
#19
Maria Boddi
Ultrasound (US) allows the non-invasive evaluation of morphological changes of kidney structure (by means of B-Mode) and patterns of renal and extrarenal vascularization (by means of color-Doppler and contrast-enhanced US). In hypertensive subjects it offers a relevant contribution to the diagnosis of early renal damage, acute or chronic nephropathies and nephrovascular disease. However, morphological changes are often detected late and non-specific and in recent years evidence has increased regarding the clinical relevance of renal resistive index (RRI) for the study of vascular and renal parenchymal renal abnormalities...
December 14, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27965714/doppler-ultrasound-in-kidney-diseases-a-key-parameter-in-clinical-long-term-follow-up
#20
REVIEW
Leonardo Spatola, Simeone Andrulli
Doppler ultrasound has been extensively used in detecting reno-vascular diseases, showing to be a non-invasive, safe, low cost and repeatable tool. The Renal Resistive Index (RRI) [(peak systolic velocity - end diastolic velocity)/peak systolic velocity] is a semi-quantitative index derived by Doppler evaluation of renal vascular bed. Normally RRI is in the range of 0.47-0.70, it increases with aging and, usually, it shows a difference between the two kidneys less than 5-8 %. RRI is an important prognostic marker in chronic kidney diseases (CKD), both in diabetic and non-diabetic kidney diseases, because, in longitudinal prospective studies, it significantly correlated with hemodynamic (ABPM, SBP, DBP, pulse pressure) and histopathological parameters (glomerular sclerosis, arteriolosclerosis, interstitial fibrosis/tubular atrophy, interstitial infiltration)...
December 2016: Journal of Ultrasound
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