keyword
MENU ▼
Read by QxMD icon Read
search

Noninvasive hemodynamic

keyword
https://www.readbyqxmd.com/read/29145350/ultrasonographic-evaluation-of-complications-related-to-transfemoral-arterial-procedures
#1
Eun Ju Chun
The transfemoral arterial approach is used to gain access for angiography, percutaneous coronary interventions, or various endovascular therapies. To decrease the risk of procedure-related vascular complications, it is recommended to puncture the common femoral artery in its middle segment. However, due to inadequate access or anatomical variability, various complications, including hematoma, pseudoaneurysm, arteriovenous fistula, thrombosis, or dissection, can occur after transfemoral arterial interventions...
August 25, 2017: Ultrasonography
https://www.readbyqxmd.com/read/29141525/hyperacute-hemodynamic-effects-of-bipap-noninvasive-ventilation-in-patients-with-acute-heart-failure-and-left-ventricular-systolic-dysfunction-in-emergency-department
#2
Cinzia Moret Iurilli, Natale Daniele Brunetti, Paola Rita Di Corato, Giuseppe Salvemini, Matteo Di Biase, Marco Matteo Ciccone, Vito Procacci
BACKGROUND: Acute heart failure (AHF) is one of the leading causes of admission to emergency department (ED); severe hypoxemic AHF may be treated with noninvasive ventilation (NIV). Despite the demonstrated clinical efficacy of NIV in relieving symptoms of AHF, less is known about the hyperacute effects of bilevel positive airway pressure (BiPAP) ventilation on hemodynamics of patients admitted to ED for AHF. We therefore aimed to assess the effect of BiPAP ventilation on principal hemodynamic, respiratory, pulse oximetry, and microcirculation indexes in patients admitted to ED for AHF, needing NIV...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29137091/the-effects-of-hypervolemic-infusion-on-microcirculation-perfusion-of-patients-during-laparoscopic-colorectal-surgery
#3
Yunxin Deng, Qianlin Zhu, Buwei Yu, Minhua Zheng, Jue Jin
The aim of this study is to assess the effects of hypervolemic infusion with different solutions on microcirculation perfusion during laparoscopic colorectal surgery.Thirty-six patients were randomly divided into Ringer lactate solution [RL] group, succinylated gelatin injection [Gel] group, and hypertonic saline hydroxyethyl starch 40 injection [HS] group. Hypervolemic infusion was performed during the induction period of general anesthesia. Arterial blood-gas parameters, noninvasive hemodynamics, gastric tonometry values, and central venous pressure (CVP) were compared at baseline (T1); the end of hypervolemic infusion (T2); 5 min (T3), 15 min (T4), 30 min (T5), and 60 min (T6) during pneumoperitoneum; 5 min (T7), 15 min (T8), and 25 min (T9) after pneumoperitoneum...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29121932/hemodynamics-analysis-of-the-serial-stenotic-coronary-arteries
#4
Xin Liu, Changnong Peng, Yufa Xia, Zhifan Gao, Pengcheng Xu, Xiaoqing Wang, Zhanchao Xian, Youbing Yin, Liqun Jiao, Defeng Wang, Lin Shi, Wenhua Huang, Xin Liu, Heye Zhang
Coronary arterial stenoses, particularly serial stenoses in a single branch, are responsible for complex hemodynamic properties of the coronary arterial trees, and the uncertain prognosis of invasive intervention. Critical information of the blood flow redistribution in the stenotic arterial segments is required for the adequate treatment planning. Therefore, in this study, an image based non-invasive functional assessment is performed to investigate the hemodynamic significances of serial stenoses. Twenty patient-specific coronary arterial trees with different combinations of stenoses were reconstructed from the computer tomography angiography for the evaluation of the hemodynamics...
November 9, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29116574/successful-percutaneous-coronary-intervention-significantly-improves-coronary-sinus-blood-flow-as-assessed-by-transthoracic-echocardiography
#5
Radmila Lyubarova, William E Boden, Steven A Fein, Joshua Schulman-Marcus, Mikhail Torosoff
BACKGROUND: Transthoracic echocardiography (TTE) has been used to assess coronary sinus blood flow (CSBF), which reflects total coronary arterial blood flow. Successful angioplasty is expected to improve coronary arterial blood flow. Changes in CSBF after percutaneous coronary intervention (PCI), as assessed by TTE, have not been systematically evaluated. HYPOTHESIS: TTE can be utilized to reflect increased CSBF after a successful, clinically indicated PCI. METHODS: The study cohort included 31 patients (18 females, 62 ± 11 years old) referred for diagnostic cardiac catheterization for suspected coronary artery disease and possible PCI, when clinically indicated...
November 7, 2017: Journal of Echocardiography
https://www.readbyqxmd.com/read/29111992/cardiovascular-and-cerebral-hemodynamics-in-asymptomatic-healthy-subjects-with-without-abnormal-head-up-tilt-test-versus-recurrent-fainters
#6
Antonio González-Hermosillo, Manuel Sierra-Beltrán, Ulises López-Peña, Andrei Kostin, Guadalupe Hernández-Pacheco, Claudia Lerma
PURPOSE: The aim of this study was to compare hemodynamic and autonomic responses during head-up tilt test (HUTT) between healthy volunteers and patients with a history of fainting and confirmed vasovagal syncope. We hypothesize that the autonomic and hemodynamic physiologic responses remain intact during orthostatic stress in people without previous fainting and negative HUTT, but deteriorate similarly in patients with recurrent vasovagal syncope and in asymptomatic healthy subjects who develop a vasovagal response during HUTT...
October 27, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29097933/clinical-applications-of-contrast-enhanced-perfusion-mri-techniques-in-gliomas-recent-advances-and-current-challenges
#7
REVIEW
Junfeng Zhang, Heng Liu, Haipeng Tong, Sumei Wang, Yizeng Yang, Gang Liu, Weiguo Zhang
Gliomas possess complex and heterogeneous vasculatures with abnormal hemodynamics. Despite considerable advances in diagnostic and therapeutic techniques for improving tumor management and patient care in recent years, the prognosis of malignant gliomas remains dismal. Perfusion-weighted magnetic resonance imaging techniques that could noninvasively provide superior information on vascular functionality have attracted much attention for evaluating brain tumors. However, nonconsensus imaging protocols and postprocessing analysis among different institutions impede their integration into standard-of-care imaging in clinic...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29095713/bicuspid-aortic-valve-associated-aortopathy-update-on-biomarkers
#8
Ashna K Maredia, Steven C Greenway, Subodh Verma, Paul W M Fedak
PURPOSE OF REVIEW: Bicuspid aortic valve (BAV)-associated aortopathy is common and its progression for individual patients is difficult to predict. The present review aims to identify recent developments using biomarkers for the determination of risk and progression of disease in patients with BAV aortopathy. RECENT FINDINGS: Novel rare genetic variants and epigenetic methylation signatures affecting non-cytosine phosphate guanine (non-CpG) and CpG sites, nicotinamide phosphoribosyltransferase and Sod expression may lead to improved prediction of the aortopathy phenotype...
October 31, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29081017/validation-of-central-and-peripheral-non-invasive-hemodynamic-variables-using-an-oscillometric-method
#9
Darío Echeverri, Alejandro Pizano, Jaime Cabrales, Karen Moreno
INTRODUCTION: Peripheral and central blood pressures are parameters of arterial stiffness and important cardiovascular risk markers. Today, there are non-invasive methods that measure these pressures. AIM: To validate the non-invasive oscillometric method, compared with invasive pressure measurements obtained by cardiac catheterization. METHODS: An open, prospective cohort clinical study in 100 patients, 64 ± 11 years old. The measurement of peripheral and central blood pressures obtained using the Arteriograph(®) system oscillometric method, (TensioMed, Budapest-Hungary, Ltd...
October 28, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/29073767/arterial-stiffness-is-associated-with-qtc-interval-prolongation-in-patients-with-heart-failure
#10
Salah Al-Zaiti, Samir Saba, Rodolfo Pike, Jennifer Williams, Fadi Khraim
BACKGROUND: A prolonged corrected QT (QTc) interval is a known risk factor for adverse cardiac events. Understanding the determinants and physiologic correlates of QTc is necessary for selecting proper strategies to reduce the risk of adverse events in high-risk patients. We sought to evaluate the role of arterial stiffness in heart failure as a determinant of QTc prolongation. METHOD: This was an observational study that recruited ambulatory heart failure patients (New York Heart Association Classes I-II) from an outpatient heart failure clinic...
January 1, 2017: Biological Research for Nursing
https://www.readbyqxmd.com/read/29070954/race-predictors-and-hemodynamic-alteration-after-an-ultra-trail-marathon-race
#11
Noppon Taksaudom, Natee Tongsiri, Amarit Potikul, Chawakorn Leampriboon, Apichat Tantraworasin, Anong Chaiyasri
OBJECTIVE: Unique rough-terrain ultra-trail running races have increased in popularity. Concerns regarding the suitability of the candidates make it difficult for organizers to manage safety regulations. The purpose of this study was to identify possible race predictors and assess hemodynamic change after long endurance races. METHODS: We studied 228 runners who competed in a 66 km-trail running race. A questionnaire and noninvasive hemodynamic flow assessment including blood pressure, heart rate, stroke volume, stroke volume variation, systemic vascular resistance, cardiac index, and oxygen saturation were used to determine physiologic alterations and to identify finish predictors...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29062269/reduced-apparent-diffusion-coefficient-in-various-brain-areas-following-low-intensity-transcranial-ultrasound-stimulation
#12
Yi Yuan, Yanchao Dong, Shuo Hu, Tao Zheng, Dan Du, Juan Du, Lanxiang Liu
Diffusion of water molecules closely related to physiological and pathological information of brain tissue. Low-intensity transcranial ultrasound stimulation (TUS) has advantages of noninvasive, high spatial resolution and penetration depth. Previous studies have demonstrate that TUS can modulate neuronal activity and alter cortical hemodynamic. However, how TUS affect diffusion of water molecules remain unclear. In this paper, in order to evaluate the effect of low-intensity TUS on the diffusion of water molecules in brain tissue, diffusion-weighted magnetic resonance (MR) imaging was performed in 19 healthy Sprague-Dawley rats in sham surgery group (six rats) and TUS group (thirteen rats) Subsequently, rats were stimulated by low-intensity transcranial ultrasound for 5 min in TUS group...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29061514/bold-mri-demonstrates-acute-placental-and-fetal-organ-hypoperfusion-with-fetal-brain-sparing-during-hypercapnia
#13
Yehuda Ginosar, Yuval Gielchinsky, Nathalie Nachmansson, Lital Hagai, Joel Shapiro, Uriel Elchalal, Rinat Abramovitch
INTRODUCTION: We evaluated changes in placental and fetal hemodynamics in rodents during acute hypercapnia using BOLD-MRI and Doppler ultrasound. METHODS: Animals were anesthetized with pentobarbital and, in consecutive 4-min periods, breathed: air, 21%O2:5%CO2, and 95%O2:5%CO2. BOLD-MRI: Pregnant ICR mice (n = 6; E17.5) were scanned in a 4.7-T Bruker Biospec spectrometer. Placenta and fetal liver, heart and brain were identified on True-FISP images...
September 11, 2017: Placenta
https://www.readbyqxmd.com/read/29058341/multichannel-wearable-fnirs-eeg-system-for-long-term-clinical-monitoring
#14
Ali Kassab, Jérôme Le Lan, Julie Tremblay, Phetsamone Vannasing, Mahya Dehbozorgi, Philippe Pouliot, Anne Gallagher, Frédéric Lesage, Mohamad Sawan, Dang Khoa Nguyen
Continuous brain imaging techniques can be beneficial for the monitoring of neurological pathologies (such as epilepsy or stroke) and neuroimaging protocols involving movement. Among existing ones, functional near-infrared spectroscopy (fNIRS) and electroencephalography (EEG) have the advantage of being noninvasive, nonobstructive, inexpensive, yield portable solutions, and offer complementary monitoring of electrical and local hemodynamic activities. This article presents a novel system with 128 fNIRS channels and 32 EEG channels with the potential to cover a larger fraction of the adult superficial cortex than earlier works, is integrated with 32 EEG channels, is light and battery-powered to improve portability, and can transmit data wirelessly to an interface for real-time display of electrical and hemodynamic activities...
October 23, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29056267/airway-ciliary-dysfunction-association-with-adverse-postoperative-outcomes-in-nonheterotaxy-congenital-heart-disease-patients
#15
Eileen Stewart, Phillip S Adams, Xin Tian, Omar Khalifa, Peter Wearden, Maliha Zahid, Cecilia W Lo
OBJECTIVE: Heterotaxy (HTX) congenital heart disease (CHD) patients with ciliary dysfunction (CD) have been shown to have increased postoperative respiratory morbidity. We hypothesized that non-HTX CHD infants with CD also will have increased postoperative morbidity, particularly respiratory complications. METHODS: Sixty-three infants with non-HTX CHD undergoing cardiac surgery were enrolled. Tests commonly used to assess for CD, nasal nitric oxide (nNO) measurements and nasal epithelial ciliary motion (CM) assessment, were obtained...
September 20, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29047916/optical-mapping-of-prefrontal-activity-in-pathological-gamblers
#16
Xiaohong Lin, Shiyang Xu, Hada Fong-Ha Ieong, Zhen Yuan
Functional near-infrared spectroscopy (fNIRS) has emerged as a highly promising brain mapping technique that enables continuously and noninvasively monitoring the hemodynamic responses in the human brain. In this study, fNIRS was utilized to identify the different brain activation patterns between pathological gamblers (PGs) and healthy controls (HCs). Specifically, we examined the hemodynamic changes in the prefrontal cortex using fNIRS recordings during the completion of executive function and decision-making tasks for both PGs and HCs...
July 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29046757/multiple-left-anterior-descending-coronary-artery-to-left-ventricular-fistula-a-case-series-and-literature-review
#17
Praneet Iyer, Rishitha Yelisetti
Coronary artery fistulas (CAFs) are found in 0.3-0.8% of patients who undergo coronary angiography. CAFs are defined as single or multiple, small or large direct communications that arise from one or more coronary arteries and enter into one of the four cardiac chambers or major vessels. We present two cases of multiple coronary artery fistulas arising from diagonal and left anterior descending (LAD) branches of left coronary artery draining into the left ventricle. In both the cases, No intervention was performed...
October 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/29034583/the-effect-of-head-up-tilt-upon-markers-of-heart-rate-variability-in-patients-with-atrial-fibrillation
#18
Hitesh C Patel, Carl Hayward, Andrew J Wardle, Lee Middleton, Alexander R Lyon, Carlo Di Mario, Tushar V Salukhe, Richard Sutton, Stuart D Rosen
BACKGROUND: Heart rate variability (HRV) analysis is uncommonly undertaken in patients with atrial fibrillation (AF) due to an assumption that ventricular response is random. We sought to determine the effects of head-up tilt (HUT), a stimulus known to elicit an autonomic response, on HRV in patients with AF; we contrasted the findings with those of patients in sinus rhythm (SR). METHODS: Consecutive, clinically indicated tilt tests were examined for 207 patients: 176 in SR, 31 in AF...
October 15, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29024300/accounting-for-the-role-of-hematocrit-in-between-subject-variations-of-mri-derived-baseline-cerebral-hemodynamic-parameters-and-functional-bold-responses
#19
Feng Xu, Wenbo Li, Peiying Liu, Jun Hua, John J Strouse, James J Pekar, Hanzhang Lu, Peter C M van Zijl, Qin Qin
Baseline hematocrit fraction (Hct) is a determinant for baseline cerebral blood flow (CBF) and between-subject variation of Hct thus causes variation in task-based BOLD fMRI signal changes. We first verified in healthy volunteers (n = 12) that Hct values can be derived reliably from venous blood T1 values by comparison with the conventional lab test. Together with CBF measured using phase-contrast MRI, this noninvasive estimation of Hct, instead of using a population-averaged Hct value, enabled more individual determination of oxygen delivery (DO2 ), oxygen extraction fraction (OEF), and cerebral metabolic rate of oxygen (CMRO2 )...
October 11, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29023250/biomechanical-determinants-of-right-ventricular-failure-in-pulmonary-hypertension
#20
Francesco Scardulla, Diego Bellavia, Patrizio Vitulo, Giuseppe Romano, Chiara Mina, Giovanni Gentile, Francesco Clemenza, Salvatore Pasta
Pulmonary hypertension (PH) is a disease characterized by progressive adverse remodeling of the distal pulmonary arteries, resulting in elevated pulmonary vascular resistance and load pressure on the right ventricle (RV), ultimately leading to RV failure. Invasive hemodynamic testing is the gold standard for diagnosing PH and guiding patient therapy. We hypothesized that lumped-parameter and biventricular finite-element (FE) modeling may lead to noninvasive predictions of both PH-related hemodynamic and biomechanical parameters that induce PH...
October 18, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
keyword
keyword
74103
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"