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https://www.readbyqxmd.com/read/28106664/ethnic-differences-regarding-arterial-stiffness-of-6-8-year-old-black-and-white-boys
#1
Gontse G Mokwatsi, Aletta E Schutte, Ruan Kruger
OBJECTIVES: Vascular deterioration is suggested to occur earlier in black than white populations, thereby increasing their risk for developing hypertension. To establish whether this is the case, we compared different estimates of arterial stiffness in black and white children and investigated the links with body composition and advanced glycation end products (AGEs) as potential contributors. METHODS: We included 40 black and 41 white boys (aged 6-8 years) from similar schools and measured arterial stiffness [pulse wave velocity (PWV) in different arterial sections, systemic arterial compliance and carotid stiffness estimates], anthropometry as well as urinary pentosidine as a marker of AGEs...
January 18, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28104550/robust-estimation-of-carotid-artery-wall-motion-using-the-elasticity-based-state-space-approach
#2
Zhifan Gao, Huahua Xiong, Xin Liu, Heye Zhang, Dhanjoo Ghista, Wanqing Wu, Shuo Li
The dynamics of the carotid artery wall has been recognized as a valuable indicator to evaluate the status of atherosclerotic disease in the preclinical stage. However, it is still a challenge to accurately measure this dynamics from ultrasound images. This paper aims at developing an elasticity-based state-space approach for accurately measuring the two-dimensional motion of the carotid artery wall from the ultrasound imaging sequences. In our approach, we have employed a linear elasticity model of the carotid artery wall, and converted it into the state space equation...
January 10, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28104044/procedural-variations-in-performing-primary-percutaneous-coronary-intervention-in-patients-with-st-elevation-myocardial-infarction
#3
Radhika M Mehta, Manyoo Agarwal, Ikechukwu Ifedili, Wael W Rizk, Rami N Khouzam
Multiple variations exist in performing a primary percutaneous coronary intervention (pPCI) in ST-segment elevation myocardial infarction (STEMI) among various cardiologists. These variations range from the choice of peripheral access artery (radial vs femoral), performance or time of complete angiography including left ventriculography, and nonculprit vessel angiography before or after intervening on the culprit vessel. The reasons for such variations include emphasis on door-to-balloon time, knowledge of cardiac anatomy before proceeding with pPCI, physician expertise, and the level of comfort with radial approach...
February 2017: Current Problems in Cardiology
https://www.readbyqxmd.com/read/28102499/aortic-radial-pulse-wave-velocity-ratio-in-end-stage-renal-disease-patients-association-with-age-body-tissue-hydration-status-renal-failure-etiology-and-five-years-of-hemodialysis
#4
Daniel Bia, Rodolfo Valtuille, Cintia Galli, Sandra Wray, Ricardo Armentano, Yanina Zócalo, Edmundo Cabrera-Fischer
INTRODUCTION: The etiology of the end-stage renal disease (ESRD) and the hydration status may be involved in the arterial stiffening process observed in hemodialyzed patients. The ratio between carotid-femoral and carotid-radial pulse wave velocity (PWV ratio) was recently proposed to characterize the patient-specific stiffening process. AIMS: to analyze: (1) the PWV-ratio in healthy and hemodialyzed subjects, analyzing potential changes associated to etiologies of the ESRD, (2) the PWV-ratio and hydration status using multiple-frequency bioimpedance and, (3) the effects of hemodialysis on PWV-ratio in a 5-year follow-up...
January 19, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/28092337/anatomical-basis-and-clinical-application-of-synovial-flaps-in-the-wrist-and-distal-forearm
#5
David L Colen, Jiun-Ting Yeh, Lawrence B Colen
Neuropathic symptoms after median nerve repair at the wrist or secondary to refractory carpal tunnel syndrome may become debilitating. These symptoms develop due to perineural adhesions, intraneural fibrosis and fixation of the nerve to the transverse carpal ligament after surgery and often require neurolysis. Interposition of vascularized soft tissue over the median nerve at the time of neurolysis prevents recurrence of such adhesions. The synovial flap, fashioned from the synovial lining of the flexor tendon sheath, is an ideal tissue for this purpose...
January 12, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28089778/image-noise-reduction-technology-reduces-radiation-in-a-radial-first-cardiac-catheterization-laboratory
#6
Ateka Gunja, Yagya Pandey, Hui Xie, Beata M Wolska, Adhir R Shroff, Amer K Ardati, Mladen I Vidovich
BACKGROUND: Transradial coronary angiography (TRA) has been associated with increased radiation doses. We hypothesized that contemporary image noise reduction technology would reduce radiation doses in the cardiac catheterization laboratory in a typical clinical setting. METHODS AND RESULTS: We performed a single-center, retrospective analysis of 400 consecutive patients who underwent diagnostic and interventional cardiac catheterizations in a predominantly TRA laboratory with traditional fluoroscopy (N=200) and a new image noise reduction fluoroscopy system (N=200)...
December 27, 2016: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28089109/a-cross-sectional-study-of-physical-activity-and-arterial-compliance-the-effects-of-age-and-artery-size
#7
A Maleah Holland, Jeffrey S Martin, Christopher D Mattson, Keith R Lohse, Peter R Finn, Joel M Stager
Our study examined the relationship between habitual high levels of vigorous physical activity on large and small artery compliance via radial artery pulse wave analysis. Eighty-three healthy men (n = 44) and women (n = 39), aged 18-78 years, were recruited as habitually less active (light-to-moderate exercise ≤3 times/wk) or habitually highly active (vigorous exercise ≥5 times/wk). A multivariate analysis of variance revealed a significant interaction of age and activity level; habitual vigorous activity was associated with greater compliance in large and small arteries in older adults (40-78 years) and younger adults (18-22 years)...
December 22, 2016: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28088558/the-effects-of-upper-body-exercise-across-different-levels-of-blood-flow-restriction-on-arterial-occlusion-pressure-and-perceptual-responses
#8
Kevin T Mattocks, Matthew B Jessee, Brittany R Counts, Samuel L Buckner, J Grant Mouser, Scott J Dankel, Gilberto C Laurentino, Jeremy P Loenneke
Recent studies have investigated relative pressures that are applied during blood flow restriction exercise ranging from 40%-90% of resting arterial occlusion pressure; however, no studies have investigated relative pressures below 40% arterial occlusion pressure. The purpose of this study was to characterize the cardiovascular and perceptual responses to different levels of pressures. Twenty-six resistance trained participants performed four sets of unilateral elbow flexion exercise using 30% of their 1RM in combination with blood flow restriction inflated to one of six relative applied pressures (0%, 10%, 20%, 30%, 50%, 90% arterial occlusion pressure)...
January 11, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28086895/design-optimization-of-stent-and-its-dilatation-balloon-using-kriging-surrogate-model
#9
Hongxia Li, Tao Liu, Minjie Wang, Danyang Zhao, Aike Qiao, Xue Wang, Junfeng Gu, Zheng Li, Bao Zhu
BACKGROUND: Although stents have great success of treating cardiovascular disease, it actually undermined by the in-stent restenosis and their long-term fatigue failure. The geometry of stent affects its service performance and ultimately affects its fatigue life. Besides, improper length of balloon leads to transient mechanical injury to the vessel wall and in-stent restenosis. Conventional optimization method of stent and its dilatation balloon by comparing several designs and choosing the best one as the optimal design cannot find the global optimal design in the design space...
January 11, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28078374/-anaesthesia-procedures-and-invasive-vascular-access-in-severely-injured-patients-at-trauma-room-admission-in-germany-an-online-survey
#10
M F Struck, P Hilbert-Carius, B Hossfeld, J Hinkelbein, M Bernhard, T Wurmb
BACKGROUND: The continuous monitoring of vital parameters and subsequent therapy belong to the core duties of anaesthetists during acute trauma resuscitation in the trauma room. Important procedures may include placement of arterial lines and central venous catheters (CVCs). Knowledge of indication, performance and localization of invasive catheterisation of trauma care in Germany is scarce. METHODS: After approval of the German Society of Anaesthesiology and Intensive Care Medicine we conducted an online survey about arterial and central venous catheterisation of severely injured patients with consideration of common practice used by anaesthetists in German trauma rooms...
January 11, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28077421/aortic-wave-reflection-during-orthostatic-challenges-influence-of-body-position-and-venous-pooling
#11
William E Hughes, Darren P Casey
BACKGROUND: Aortic wave reflection (augmentation index; AIx) decreases during orthostatic challenges despite increased peripheral resistance, which is thought to be due to venous pooling. The purpose of this study was to examine if the decrease in AIx during an orthostatic challenge is due to venous pooling alone or body position manipulation. METHODS: Twenty-three young, healthy adults (11F/12M) participated in 3 separate orthostatic challenges (5 minutes each); 60° head-up tilt (HUT), 60° HUT with bilateral rhythmic blood pressure (BP) cuff inflation on calves (75 mm Hg) to minimize venous pooling, and lower body negative pressure (LBNP; -30 mm Hg) for venous pooling independent of body position...
February 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28073876/radial-artery-pseudoaneurysm-rare-complication-of-a-frequent-procedure
#12
Jose Paxiuta, Maria João Lobão, Liliana Carvalho
No abstract text is available yet for this article.
January 10, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28071964/hypercapnia-is-essential-to-reduce-the-cerebral-oxidative-metabolism-during-extreme-apnea-in-humans
#13
Anthony R Bain, Philip N Ainslie, Otto F Barak, Ryan L Hoiland, Ivan Drvis, Tanja Mijacika, Damian M Bailey, Antoinette Santoro, Daniel K DeMasi, Zeljko Dujic, David B MacLeod
The cerebral metabolic rate of oxygen (CMRO2) is reduced during apnea that yields profound hypoxia and hypercapnia. In this study, to dissociate the impact of hypoxia and hypercapnia on the reduction in CMRO2, 11 breath-hold competitors completed three apneas under: (a) normal conditions (NM), yielding severe hypercapnia and hypoxemia, (b) with prior hyperventilation (HV), yielding severe hypoxemia only, and (c) with prior 100% oxygen breathing (HX), yielding the greatest level of hypercapnia, but in the absence of hypoxemia...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28063138/are-biventricular-systolic-functions-impaired-in-patient-with-coronoray-slow-flow-a-prospective-study-with-three-dimensional-speckle-tracking
#14
Tuğba Kemaloğlu Öz, Mehmet Eren, Işıl Atasoy, Tayfun Gürol, Özer Soylu, Bahadır Dağdeviren
The newly developed three dimensional speckle-tracking echocardiography (3D-STE) technology provides quick and comprehensive quantitative assessment of biventricular myocardial dynamics. The impact of coronary slow flow phenomenon (CSFP) on biventricular functions has not been comprehensively evaluated using this new technology. Therefore, the aim of this study was to evaluate the effects of CSFP on biventricular systolic functions using 3D-STE. Forty patients with CSFP and otherwise normal coronary arteries (NCAs) and 40 age- and sex-matched controls with normal coronary angiograms (CAGs) were prospectively enrolled...
January 6, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28062176/characteristics-and-surgical-management-of-flap-compromise-caused-by-thrombosis-of-the-internal-jugular-vein
#15
Bin Yang, Yi Qu, Ming Su, Jinzhong Li, Hua Li, Rudong Xing, Zhengxue Han
BACKGROUND: A principal reason for flap compromise in oral and maxillofacial head and neck surgery, and failure of a free flap transfer, is thrombosis of a drainage vein such as the internal jugular vein. This study characterized flap compromise caused by internal jugular vein thrombosis after a free flap transfer, and its management. PATIENTS AND METHODS: A retrospective clinical study was conducted of 306 consecutive microvascular free flaps performed for 305 patients with head and neck cancer from March 2003 to March 2013 at the Department of Oral and Maxillofacial Surgery at Beijing Stomatological Hospital, Capital Medical University...
December 18, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28060961/pilot-study-estimation-of-stroke-volume-and-cardiac-output-from-pulse-wave-velocity
#16
Yurie Obata, Maki Mizogami, Daniel Nyhan, Dan E Berkowitz, Jochen Steppan, Viachaslau Barodka
BACKGROUND: Transesophageal echocardiography (TEE) is increasingly replacing thermodilution pulmonary artery catheters to assess hemodynamics in patients at high risk for cardiovascular morbidity. However, one of the drawbacks of TEE compared to pulmonary artery catheters is the inability to measure real time stroke volume (SV) and cardiac output (CO) continuously. The aim of the present proof of concept study was to validate a novel method of SV estimation, based on pulse wave velocity (PWV) in patients undergoing cardiac surgery...
2017: PloS One
https://www.readbyqxmd.com/read/28057387/principal-strain-vascular-elastography-simulation-and-preliminary-clinical-evaluation
#17
Rohit Nayak, Steven Huntzicker, Jacques Ohayon, Nancy Carson, Vikram Dogra, Giovanni Schifitto, Marvin M Doyley
It is difficult to produce reliable polar strain elastograms (radial and circumferential) because the center of the carotid artery is typically unknown. Principal strain imaging can overcome this limitation, but suboptimal lateral displacement estimates make this an impractical approach for visualizing mechanical properties within the carotid artery. We hypothesized that compounded plane wave imaging can minimize this problem. To test this hypothesis, we performed (i) simulations with vessels of varying morphology and mechanical behavior (i...
January 2, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28056520/preoperative-insight-into-the-quality-of-radial-artery-grafts
#18
Petar Vukovic, Miodrag Peric, Sandra Radak, Nikola Aleksic, Dragana Unic-Stojanovic, Slobodan Micovic, Ivan Stojanovic, Predrag Milojevic
We investigated the impact of preoperative ultrasonography of the forearm circulation on radial artery conduit selection. Preoperative ultrasound of the forearm circulation was performed routinely in 536 patients planned for radial artery harvesting. The safety assessment of the harvest included the following algorithm of tests: the ultrasound, the Allen test, and pulse oximetry. The quality criteria that were used to exclude a radial artery from harvesting were small size of the artery, diffuse atherosclerosis, calcifications, and severe neointimal hyperplasia...
January 1, 2017: Angiology
https://www.readbyqxmd.com/read/28050424/abdominal-angina-treated-by-urgent-percutaneous-angioplasty-an-excellent-alternative-to-surgical-revascularisation
#19
Vamsi Krishna Kamana, Ranjan Shetty, Anand M Krishnan, M Sudhakar Rao, Umesh Pai Malpe
Chronic Mesenteric Ischemia (CMI) presenting as acute abdomen can be treated percutaneously. An endovascular intervention has surpassed surgical revascularization over the past decade due to its lesser perioperative complication rate. Trans-femoral approach of revascularising is limited by its difficulty in coaxial alignment of the guiding catheter and hence, brachial artery and recently the radial approach have been utilized for mesenteric artery revascularisation for over a decade. Here by we report a case of chronic mesenteric ischemia having total occlusion of two and 70% occlusion of one of the three mesenteric vessels...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28043217/modulation-of-carotid-strain-by-statin-therapy-in-atherosclerosis-patients
#20
Christian Alexander Schaefer, Anna Katharina Blatzheim, Sebastian Gorgonius Passon, Kristin Solveig Pausewang, Nadjib Schahab, Georg Nickenig, Dirk Skowasch, Robert Schueler, Christoph Hammerstingl, Simon Pingel
BACKGROUND: The beneficial effect of statin therapy on the progress of atherosclerotic disease has been demonstrated by numerous studies. Vascular strain imaging is an arising method to evaluate arterial stiffness. Our study examined whether an influence of statin therapy on the vessel wall could be detected by vascular strain imaging. PATIENTS AND METHODS: 88 patients with recently detected atherosclerosis underwent an angiological examination including ankle-brachial index (ABI), pulse wave index (PWI), central puls ewave velocity and duplex ultrasound...
January 3, 2017: VASA. Zeitschrift Für Gefässkrankheiten
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