keyword
MENU ▼
Read by QxMD icon Read
search

vf

keyword
https://www.readbyqxmd.com/read/28938308/sensor-based-physiologic-control-strategy-for-biventricular-support-with-rotary-blood-pumps
#1
Yu Wang, Steven C Koenig, Zhongjun Wu, Mark S Slaughter, Guruprasad A Giridharan
Rotary biventricular assist devices (BiVAD) are becoming a clinically accepted treatment option for end-stage biventricular failure. To improve BiVAD efficacy and safety, we propose a control algorithm to achieve the clinical objectives of maintaining left-right-sided balance, restoring physiologic flows, and preventing ventricular suction. The control algorithm consists of two proportional-integral (PI) controllers for left and right ventricular assist devices (LVAD and RVAD) to maintain differential pump pressure across LVAD (ΔPL) and RVAD (ΔPR) to provide left-right balance and physiologic flow...
September 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28935286/mercury-exposure-induces-proinflammatory-enzymes-in-vascular-fibroblasts
#2
Alberto Millán Longo, Óscar Montero Saiz, Claudia Sarró Fuente, Andrea Aguado Martínez, Mercedes Salaices Sánchez
INTRODUCTION: Previous studies show that mercury exposure increases cardiovascular risk, although the underlying cellular mechanisms have still not been fully studied. The aim of this project is to study, in vascular fibroblasts (VF), the effect of HgCl2 exposure on the expression of enzymes involved in the synthesis of prostanoids and reactive oxygen species (ROS). These molecules have been shown to participate in the inflammatory response associated with cardiovascular diseases. MATERIAL AND METHODS: Adventitial VF cultures of Sprague-Dawley rat aortas, shown to be α-actin negative by immunofluorescence, were exposed to HgCl2 (0...
September 18, 2017: Clínica e Investigación en Arteriosclerosis
https://www.readbyqxmd.com/read/28934833/hemodynamic-analysis-of-radiation-induced-damage-in-common-carotid-arteries-by-using-color-doppler-ultrasonography
#3
Alireza Mohammadkarim, Manijhe Mokhtari-Dizaji, Ali Kazemian, Hazhir Saberi
Purpose: The aim of this study was to assess vascular changes and blood flow abnormalities in the common carotid arteries of patients with head and neck cancers after external radiotherapy, using color Doppler ultrasonography. Methods: We studied 24 patients treated with external radiotherapy for various head and neck cancers. In order to study the acute effects of irradiation on common carotid blood flow and arterial diameter changes, color Doppler ultrasonography parameters such as peak systolic velocity, end diastolic velocity, mean velocity, systolic-to-diastolic velocity (S/D) ratio, pulsatility index (PI), resistive index (RI), and instantaneous diameter changes were evaluated before and after external radiotherapy...
April 14, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28933244/ventricular-fibrillation-and-myocardial-depression-following-pulmonary-valve-replacement-in-tetralogy-of-fallot-with-an-intramural-coronary-artery-and-coronary-artery-compression-by-chest-tube
#4
Mubbasheer Ahmed, Nathan E Thompson, Susan R Foerster, Michele A Frommelt, Michael E Mitchell, John P Scott
We describe the case of a 10-year-old male with a history of repaired Tetralogy of Fallot and known intramural right coronary artery (RCA) who presented for bioprosthetic pulmonary valve replacement. The operation was complicated by postoperative ventricular fibrillation arrest. Selective coronary angiography revealed external compression of the mid-RCA by a mediastinal chest tube that improved immediately upon removal of the tube. Ultimately, the patient required additional unroofing of the intramural coronary for full recovery...
January 1, 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28932621/the-scheie-visual-field-grading-system
#5
Prithvi S Sankar, Laura O'Keefe, Daniel Choi, Rebecca Salowe, Eydie Miller-Ellis, Amanda Lehman, Victoria Addis, Meera Ramakrishnan, Vikas Natesh, Gideon Whitehead, Naira Khachatryan, Joan O'Brien
OBJECTIVE: No method of grading visual field (VF) defects has been widely accepted throughout the glaucoma community. The SCHEIE (Systematic Classification of Humphrey visual fields-Easy Interpretation and Evaluation) grading system for glaucomatous visual fields was created to convey qualitative and quantitative information regarding visual field defects in an objective, reproducible, and easily applicable manner for research purposes. METHODS: The SCHEIE grading system is composed of a qualitative and quantitative score...
June 2017: Journal of Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28932359/coronary-angiography-findings-in-cardiac-arrest-patients-with-non-diagnostic-post-resuscitation-electrocardiogram-a-comparison-of-shockable-and-non-shockable-initial-rhythms
#6
Pedro Martínez-Losas, Pablo Salinas, Carlos Ferrera, María Teresa Nogales-Romo, Francisco Noriega, María Del Trigo, Iván Javier Núñez-Gil, Luis Nombela-Franco, Nieves Gonzalo, Pilar Jiménez-Quevedo, Javier Escaned, Antonio Fernández-Ortiz, Carlos Macaya, Ana Viana-Tejedor
AIM: To investigate the impact of coronary artery disease in a cohort of patients resuscitated from cardiac arrest with non-diagnostic electrocardiogram. METHODS: From March 2004 to February 2016, 203 consecutive patients resuscitated from in or out-of-hospital sudden cardiac arrest and non-diagnostic post-resuscitation electrocardiogram (defined as ST segment elevation or pre-sumably new left bundle branch block) who underwent invasive coronary angiogram during hospitalization were included...
August 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28931785/ventricular-fibrillation-due-to-early-repolarization-syndrome-in-the-wake-of-hypothermia-due-to-fulminant-acute-disseminated-encephalomyelitis
#7
Kyoichiro Yazaki, Yoichi Ajiro, Kunihiko Shimizu, Fumiaki Mori, Nobue Yagihara, Akinori Sato, Tatsuya Takahashi, Kazunori Iwade
No abstract text is available yet for this article.
September 20, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28930854/a-female-patient-with-hypokalaemia-induced-j-wave-syndrome-an-unusual-case-report
#8
Aqian Wang, Xiang Li, Muhammad Nabeel Dookhun, Tiancheng Zhang, Ping Xie, Yunshan Cao
RATIONALE: Prominent J waves can be seen in life-threatening cardiac arrhythmias such as Brugada syndrome, early repolarization syndrome, and ventricular fibrillation. We herein present an unusual case report of hypokalemia-induced J wave syndrome and ST (a part of ECG) segment elevation. PATIENTS CONCERNS: A 52-year-old woman with chief complaints of chest pain for 2 hours and diarrhea showed a marked hypokalemia (2.8 mmol/L) and slightly elevated creatine kinase-MB (CK-MB) (57...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28930576/impact-of-chocolate-on-the-cardiovascular-health
#9
Maria Alessandra Gammone, Konstantinos Efthymakis, Francesca Romana Pluchinotta, Sonia Bergante, Guido Tettamanti, Graziano Riccioni, Nicolantonio D'Orazio
The antioxidants such as polyphenols, especially flavonols, present in large quantitites in cocoa, cause vasodilation, modulate inflammatory markers and cardiovascular health, and possess a range of protective cardiovascular effects. On the other hand, overconsumption of chocolate can lead to tachyarrhythmias, supraventricular tachycardia, atrial fibrillation, ventricular tachycardia and ventricular fibrillation due to its caffeine content. This review describes both the cardioprotective and adverse effects of chocolate and its constituents...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28928045/the-electrocardiographic-triangular-qrs-st-t-waveform-pattern-in-patients-with-st-segment-elevation-myocardial-infarction-incidence-pathophysiology-and-clinical-implications
#10
Alberto Cipriani, Gianpiero D'Amico, Giulia Brunello, Martina Perazzolo Marra, Federico Migliore, Luisa Cacciavillani, Giuseppe Tarantini, Barbara Bauce, Sabino Iliceto, Domenico Corrado, Alessandro Zorzi
BACKGROUND: A specific ECG pattern of presentation of ST-segment elevation acute myocardial infarction (STEMI), characterized by "triangular QRS-ST-T waveform" (TW), has been associated with poor in-hospital prognosis but longitudinal data on its incidence and clinical impact are lacking. We prospectively evaluated the incidence and prognostic meaning of the TW pattern in a cohort of consecutive STEMI patients. METHODS: All STEMI patients who presented within 12h of symptoms onset and showed no complete bundle branch block or paced ventricular rhythm were included...
August 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28927190/outcomes-differ-by-first-documented-rhythm-after-witnessed-out-of-hospital-cardiac-arrest-in-children-an-observational-study-with-prospective-nationwide-population-based-cohort-database-in-japan
#11
Masahiko Hara, Kenichi Hayashi, Tetsuhisa Kitamura
Aims: To evaluate and compare outcomes and impacts of delay of time to cardiopulmonary resuscitation (CPR) by type of first documented rhythm in paediatric patients with out-of-hospital cardiac arrest (OHCA). Methods and results: We enrolled 3968 paediatric (aged <18 years) OHCA patients whose events were witnessed between 2005 and 2012 from a prospective nationwide population-based cohort database in Japan. We assessed and compared their neurologically favourable 1-month survival according to first documented rhythm: pulseless ventricular tachycardia/ventricular fibrillation (pVT/VF), pulseless electrical activity (PEA), or asystole...
January 1, 2017: European Heart Journal. Quality of Care & Clinical Outcomes
https://www.readbyqxmd.com/read/28926815/cognitive-function-and-walking-velocity-in-people-with-dementia-a-comparison-of-backward-and-forward-walking
#12
Hanna Johansson, Lillemor Lundin-Olsson, Håkan Littbrand, Yngve Gustafson, Erik Rosendahl, Annika Toots
How forward and backward walking, both central to everyday life, relate to cognition are relatively unexplored in people with dementia. This study aimed to investigate if forward and backward walking velocity respectively, associated with global cognition and executive function in people with dementia, and whether the association differed according to walking aid use or dementia type. Using a cross-sectional design, 161 participants (77% women), a mean Mini-Mental State Examination (MMSE) score of 15, and mean age of 85...
September 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28926125/the-prevalence-of-vertebral-fractures-is-associated-with-reduced-hip-bone-density-and-inferior-peripheral-appendicular-volumetric-bone-density-and-structure-in-older-women
#13
Lisa Johansson, Daniel Sundh, Michael Zoulakis, Robert Rudäng, Anna Darelid, Helena Brisby, Anna G Nilsson, Dan Mellström, Mattias Lorentzon
Vertebral fractures (VF) are among the most severe and prevalent osteoporotic fractures. Their association with bone microstructure have been investigated in several retrospective case-control studies with spine radiography for diagnosis of VF. The aim of this population-based cross-sectional study of 1027 women aged 75-80 years, was to investigate if prevalent VF, identified by vertebral fracture assessment (VFA) by dual-energy X-ray absorptiometry (DXA), was associated with appendicular volumetric bone density, structure and bone material strength index (BMSi), independently of hip areal bone mineral density (aBMD)...
September 19, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28919378/sudden-death-mechanisms-in-non-ischemic-cardiomyopathies-insights-gleaned-from-clinical-implantable-cardioverter-defibrillator-trials
#14
Benjamin A Steinberg, Siva K Mulpuru, James C Fang, Bernard J Gersh
Sudden cardiac death (SCD) represents a major cause of death among patients with heart failure. While scar-based, macro-reentrant ventricular tachycardia and ventricular fibrillation (VT/VF) is the primary etiology for SCD among patients with ischemic cardiomyopathy, a more diverse set of mechanisms and substrates are likely at play for the diverse group of patients characterized by non-ischemic, dilated cardiomyopathy (NICM). These causes may include scar-based re-entry, but also neurohormonal stimulation (sympathetic, parasympathetic, renin-angiotensin-aldosterone), inflammation, and non-arrhythmic processes occurring in the context of a genetic predisposition...
September 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28917893/carboxymethyl-cyclosophoraoses-as-a-flexible-ph-responsive-solubilizer-for-pindolol
#15
Yiluo Hu, Hwanhee Kim, Vijay Vilas Shinde, Daham Jeong, Youngjin Choi, Eunae Cho, Seunho Jung
In the present study, cyclosophoraoses (CyS) (β-1,2 linked cyclic glucans, with glucopyranose units ranging from 17 to 23) isolated from Rhizobium leguminosarum biovar viciae VF-39 were modified with carboxymethyl (CM) groups, and the pH-sensitive complexation of CM CyS with pindolol was investigated. The solubility of pindolol increased 32-fold by its complexation with 5mM CM CyS at pH 10, whereas it shows no significant change at pH 3. Pindolol, a β-adrenergic blocking agent, has a hydrophobic nature at non-ionized state, and CM CyS could solubilize efficiently pindolol in a high alkaline solution...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917566/out-of-hospital-cardiac-arrest-due-to-ventricular-fibrillation-in-children-a-call-to-action
#16
EDITORIAL
Sarah R Fuchs, Prince J Kannankeril
No abstract text is available yet for this article.
September 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28917560/outcomes-of-rescue-cardiopulmonary-support-for-periprocedural-acute-hemodynamic-decompensation-in-patients-undergoing-catheter-ablation-of-electrical-storm
#17
Andres Enriquez, Jackson Liang, Javier Gentile, Robert Schaller, Gregory Supple, David S Frankel, Fermin Garcia, Joyce Wald, Edo Y Birati, J Eduardo Rame, Christian Bermudez, David Callans, Francis Marchlinski, Pasquale Santangeli
BACKGROUND: In patients with ventricular tachycardia/fibrillation (VT/VF) electrical storm (ES) undergoing catheter ablation (CA), hypotension due to refractory VT/VF, use of anesthesia and cardiac stunning due to repeated ICD shocks might precipitate acute hemodynamic decompensation (AHD). OBJECTIVE: We evaluated the outcomes of emergent cardiopulmonary support with extracorporeal membrane oxygenation (ECMO) to rescue AHD in patients undergoing CA of ES. METHODS: Between 2010 and 2016, 21 patients with ES (VT in 11 and PVC-triggered VF in 10) were referred for CA and had periprocedural AHD requiring emergent ECMO support...
September 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28916511/failure-to-treat-life-threatening-ventricular-tachyarrhythmias-in-contemporary-implantable-cardioverter-defibrillators-implications-for-strategic-programming
#18
Anna Margrethe Thøgersen, Jacob Moesgaard Larsen, Jens Brock Johansen, Moeen Abedin, Charles D Swerdlow
BACKGROUND: In clinical trials, manufacturer-specific, strategic programming of implantable cardioverter-defibrillators (ICDs), including faster detection rates, reduces unnecessary therapy but permits therapy for ventricular tachycardia/ventricular fibrillation (VF). Present consensus recommends a generic rate threshold between 185 and 200 beats per minute, which exceeds the rate tested in clinical trials for some manufacturers. In a case series, we sought to determine the relationship between programmed parameters and failure of modern ICDs to treat VF...
September 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28914169/development-of-an-algorithm-for-determination-of-the-likelihood-of-virological-failure-in-hiv-positive-adults-receiving-antiretroviral-therapy-in-decentralized-care
#19
Anton Reepalu, Taye Tolera Balcha, Sten Skogmar, Per-Erik Isberg, Patrik Medstrand, Per Björkman
BACKGROUND: Early identification of virological failure (VF) limits occurrence and spread of drug-resistant viruses in patients receiving antiretroviral treatment (ART). Viral load (VL) monitoring is therefore recommended, but capacities to comply with this are insufficient in many low-income countries. Clinical algorithms might identify persons at higher likelihood of VF to allocate VL resources. OBJECTIVES: We aimed to construct a VF algorithm (the Viral Load Testing Criteria; VLTC) and compare its performance to the 2013 WHO treatment failure criteria...
2017: Global Health Action
https://www.readbyqxmd.com/read/28912582/evolution-of-gag-and-gp41-in-patients-receiving-ritonavir-boosted-protease-inhibitors
#20
Justen Manasa, Vici Varghese, Sergei L Kosakovsky Pond, Soo-Yon Rhee, Philip L Tzou, W Jeffrey Fessel, Karen S Jang, Elizabeth White, Thorsteinn Rögnvaldsson, David A Katzenstein, Robert W Shafer
Several groups have proposed that genotypic determinants in gag and the gp41 cytoplasmic domain (gp41-CD) reduce protease inhibitor (PI) susceptibility without PI-resistance mutations in protease. However, no gag and gp41-CD mutations definitively responsible for reduced PI susceptibility have been identified in individuals with virological failure (VF) while receiving a boosted PI (PI/r)-containing regimen. To identify gag and gp41 mutations under selective PI pressure, we sequenced gag and/or gp41 in 61 individuals with VF on a PI/r (n = 40) or NNRTI (n = 20) containing regimen...
September 14, 2017: Scientific Reports
keyword
keyword
78621
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"