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https://www.readbyqxmd.com/read/28239054/critical-care-management-focused-on-optimizing-brain-function-after-cardiac-arrest
#1
Ryuta Nakashima, Toru Hifumi, Kenya Kawakita, Tomoya Okazaki, Satoshi Egawa, Akihiko Inoue, Ryutaro Seo, Nobuhiro Inagaki, Yasuhiro Kuroda
The discussion of neurocritical care management in post-cardiac arrest syndrome (PCAS) has generally focused on target values used for targeted temperature management (TTM). There has been less attention paid to target values for systemic and cerebral parameters to minimize secondary brain damage in PCAS. And the neurologic indications for TTM to produce a favorable neurologic outcome remain to be determined. Critical care management of PCAS patients is fundamental and essential for both cardiologists and general intensivists to improve neurologic outcome, because definitive therapy of PCAS includes both special management of the cause of cardiac arrest, such as coronary intervention to ischemic heart disease, and intensive management of the results of cardiac arrest, such as ventilation strategies to avoid brain ischemia...
February 24, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28236850/intermittent-hypoxia-as-a-means-to-improve-aerobic-capacity-in-type-2-diabetes
#2
R J Leone, S Lalande
Physical inactivity and a low maximal aerobic capacity (VO2max) strongly predict morbidity and mortality in patients with type 2 diabetes (T2D). Patients with T2D have a reduced VO2max when compared with healthy individuals of similar age, weight, and physical activity levels, and this lower aerobic capacity is usually attributed to a reduced oxygen delivery to the working muscles. The oxygen carrying capacity of the blood, as well as increases in cardiac output and blood flow, contribute to the delivery of oxygen to the active muscles during exercise...
March 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28235809/management-and-outcome-of-patients-with-acute-coronary-syndrome-caused-by-plaque-rupture-versus-plaque-erosion-an%C3%A2-intravascular-optical-coherence-tomography-study
#3
Sining Hu, Yinchun Zhu, Yingying Zhang, Jiannan Dai, Lulu Li, Harold Dauerman, Tsunenari Soeda, Zhao Wang, Hang Lee, Chao Wang, Chunyang Zhe, Yan Wang, Gonghui Zheng, Shaosong Zhang, Haibo Jia, Bo Yu, Ik-Kyung Jang
BACKGROUND: Plaque rupture and erosion are the 2 most common mechanisms for acute coronary syndromes. However, the outcome of these 2 distinct pathologies in patients with acute coronary syndromes has never been studied. METHODS AND RESULTS: We retrospectively studied 141 patients with acute coronary syndromes who underwent optical coherence tomography (OCT) imaging of the culprit lesion prior to stenting from the Massachusetts General Hospital OCT Registry. Management (stent versus no stent), poststent OCT findings, and outcomes were compared...
February 24, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28229626/the-role-of-hydrogen-sulfide-in-homocysteine-induced-cardiodynamic-effects-and-oxidative-stress-markers-in-the-isolated-rat-heart
#4
M Stojanovic, V Zivkovic, I Srejovic, V Jakovljevic, N Jeremic, D Djuric
This study aimed to assess the role of H2S in homocysteine-induced cardiodynamic effects in the isolated rat heart. The hearts were retrogradely perfused according to the Langendorff technique. The maximum and minimum rates of pressure in the left ventricle (dp/dt max, dp/dt min), systolic and diastolic left ventricular pressures (SLVP, DLVP), heart rate (HR), and coronary flow (CF) were measured. A spectrophotometrical method was used to measure the following oxidative stress markers: index of lipid peroxidation (thiobarbituric acid reactive substances, TBARS), nitrite level (NO2(-)), superoxide anion radicals (O2(•-)), and hydrogen peroxide (H2O2) concentrations...
December 2016: Physiol Int
https://www.readbyqxmd.com/read/28229168/cd14-cd16-nonclassical-monocytes-are-associated-with-endothelial-dysfunction-in-patients-with-coronary-artery-disease
#5
Karol Urbanski, Dominik Ludew, Grzegorz Filip, Magdalena Filip, Agnieszka Sagan, Piotr Szczepaniak, Grzegorz Grudzien, Jerzy Sadowski, Barbara Jasiewicz-Honkisz, Tomasz Sliwa, Boguslaw Kapelak, Eilidh McGinnigle, Tomasz Mikolajczyk, Tomasz J Guzik
Endothelial dysfunction and inflammation are key mechanisms of vascular disease. We hypothesised that heterogeneity of monocyte subpopulations may be related to the development of vascular dysfunction in coronary artery disease (CAD). Therefore, we examined the relationships between monocyte subsets (CD14(++)CD16(-) "classical - Mon1", CD14(++)CD16(+) "intermediate - Mon2" and CD14(+)CD16(++) "nonclassical - Mon3"), endothelial function and risk factor profiles in 130 patients with CAD undergoing coronary artery bypass grafting...
February 23, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28227463/hemodynamic-effects-of-synchronizing-an-intra-aortic-vad-in-reverse-rotation-control-with-left-ventricle-a-mock-loop-study
#6
Yaxin Wang, P Alex Smith, Daniel L Timms, Po-Lin Hsu, Richard A McMahon, Yaxin Wang, P Alex Smith, Daniel L Timms, Po-Lin Hsu, Richard A McMahon, Richard A McMahon, Daniel L Timms, Po-Lin Hsu, Yaxin Wang, P Alex Smith
The IntraVAD is an intra-aortic left ventricular assist device (LVAD) to be located in the ascending aorta. In order to enhance unloading and promote coronary flow for the left ventricle (LV), an operating mechanism, reverse-rotation control (RRc) mode, has been developed for the IntraVAD and tested in vitro in a mock circulation loop (MCL). The RRc mode consists of forward rotation (FR) and reverse rotation (RR). The synchronization between the IntraVAD and the LV was studied to offload the ventricle more effectively and to improve myocardial perfusion...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227224/cfd-analysis-of-strut-influence-on-blood-flow-in-stent-implanted-left-main-coronary-artery-bifurcation
#7
Yuya Yamada, Takahiro Tsukahara, Masahiro Motosuke, Yusuke Fujino, Yuya Yamada, Takahiro Tsukahara, Masahiro Motosuke, Yusuke Fujino, Takahiro Tsukahara, Yuya Yamada, Yusuke Fujino, Masahiro Motosuke
We numerically studied blood flows in a simulated branching pipe of coronary artery bifurcation, which is affected by stent implantation. We found that stent struts provide effects as guide vanes and blockages on the flow into circumflex branch. The former effect increases the flow rate and shear stress on the arteriosclerosis-prone site. The blockage effect may overwhelm the guide effect depending on a strut position against the inflow.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227067/computational-estimation-of-the-severity-of-coronary-lesions-with-intravascular-ultrasound-images-a-pilot-study
#8
Panagiotis K Siogkas, Michail I Papafaklis, Bill D Gogas, Habib Samady, Lampros K Michalis, Dimitrios I Fotiadis, Panagiotis K Siogkas, Michail I Papafaklis, Bill D Gogas, Habib Samady, Lampros K Michalis, Dimitrios I Fotiadis, Bill D Gogas, Habib Samady, Michail I Papafaklis, Dimitrios I Fotiadis, Panagiotis K Siogkas, Lampros K Michalis
The fast and accurate hemodynamic functional assessment of the coronary vasculature is of utmost importance in clinical practice due to the fact that Cardiovascular Diseases have become the leading cause of death globally. In this work we propose a novel method that combines two of the most efficient methods of hemodynamic status assessment of coronary arteries, Intravascular UtraSound and virtual Functional Assessment Index, an index that correlates well to the measured Fractional Flow Reserve. One Left Anterior Descending segment was reconstructed both in a straight manner (using only IVUS images) as well as using the actual 3D geometry of the vessel (using IvUS images combined with the respective coronary angiographic images [2])...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226721/overcoming-spatio-temporal-limitations-using-dynamically-scaled-in-vitro-pc-mri-a-flow-field-comparison-to-true-scale-computer-simulations-of-idealized-stented-and-patient-specific-left-main-bifurcations
#9
Susann Beier, John Ormiston, Mark Webster, John Cater, Stuart Norris, Pau Medrano-Gracia, Alistair Young, Kathleen Gilbert, Brett Cowan, Susann Beier, John Ormiston, Mark Webster, John Cater, Stuart Norris, Pau Medrano-Gracia, Alistair Young, Kathleen Gilbert, Brett Cowan, Stuart Norris, Brett Cowan, Pau Medrano-Gracia, Kathleen Gilbert, Mark Webster, Alistair Young, Susann Beier, John Cater, John Ormiston
The majority of patients with angina or heart failure have coronary artery disease. Left main bifurcations are particularly susceptible to pathological narrowing. Flow is a major factor of atheroma development, but limitations in imaging technology such as spatio-temporal resolution, signal-to-noise ratio (SNRv), and imaging artefacts prevent in vivo investigations. Computational fluid dynamics (CFD) modelling is a common numerical approach to study flow, but it requires a cautious and rigorous application for meaningful results...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224105/nutrient-stimulation-of-mesenteric-blood-flow-implications-for-older-critically-ill-patients
#10
REVIEW
Thu An Nguyen, Yasmine Ali Abdelhamid, Liza K Phillips, Leeanne S Chapple, Michael Horowitz, Karen L Jones, Adam M Deane
Nutrient ingestion induces a substantial increase in mesenteric blood flow. In older persons (aged ≥ 65 years), particularly those with chronic medical conditions, the cardiovascular compensatory response may be inadequate to maintain systemic blood pressure during mesenteric blood pooling, leading to postprandial hypotension. In older ambulatory persons, postprandial hypotension is an important pathophysiological condition associated with an increased propensity for syncope, falls, coronary vascular events, stroke and death...
February 4, 2017: World Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28223437/long-term-administration-of-eicosapentaenoic-acid-improves-post-myocardial-infarction-cardiac-remodeling-in-mice-by-regulating-macrophage-polarization
#11
Masayuki Takamura, Keisuke Kurokawa, Hiroshi Ootsuji, Oto Inoue, Hikari Okada, Ayano Nomura, Shuichi Kaneko, Soichiro Usui
BACKGROUND: Consumption of n-3 fatty acids reduces the incidence of cardiovascular mortality in populations that consume diets rich in fish oil. Eicosapentaenoic acid (EPA) is an n-3 fatty acid known to reduce the frequency of nonfatal coronary events; however, the frequency of mortality after myocardial infarction (MI) is not reduced. The aims of this study were to determine whether long-term administration of EPA regulated cardiac remodeling after MI and to elucidate the underlying therapeutic mechanisms of EPA...
February 21, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28220463/can-we-improve-the-outcomes-of-multivessel-disease-using-modified-syntax-and-residual-syntax-scores
#12
REVIEW
Alfredo E Rodriguez, Carlos Fernandez-Pereira, Juan Mieres, Javier Mendoza, Florencia Sartori
PURPOSE OF REVIEW: In spite of the benefits of drug eluting (DES), these advantages were not translated to better outcome when percutaneous coronary interventions (PCI) were compared with coronary artery bypass surgery. PCI strategy allowing stent deployment in all intermediate lesions including small vessels together with DES design may be the reasons of these findings. RECENT FINDINGS: Recently randomized and observational studies demonstrated using functional flow reserve analysis, residual Syntax score risk, or residual ERACI score after PCI that a reasonably incomplete revascularization was associated with good long-term outcome and low events rate at follow-up...
March 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28220273/numerical-and-experimental-investigations-of-the-flow-pressure-relation-in-multiple-sequential-stenoses-coronary-artery
#13
S Li, Cheng Chin, Vikas Thondapu, Eric K W Poon, Jason P Monty, Yingguang Li, Andrew S H Ooi, Shengxian Tu, Peter Barlis
Virtual fractional flow reserve (vFFR) has been evaluated as an adjunct to invasive fractional flow reserve (FFR) in the light of its operational and economic benefits. The accuracy of vFFR and the complexity of hyperemic flow simulation are still not clearly understood. This study investigates the flow-pressure relation in an idealised multiple sequential stenoses coronary artery model via numerical and experimental approaches. Pressure drop is linearly correlated with flow rate irrespective of the number of stenosis...
February 20, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28219627/antithrombin-iii-protects-against-contrast-induced-nephropathy
#14
Zeyuan Lu, Dongsheng Cheng, Jianyong Yin, Rui Wu, Guangyuan Zhang, Qing Zhao, Niansong Wang, Feng Wang, Mingyu Liang
We previously reported that insufficiency of antithrombin III (ATIII), the major anti-coagulation molecule in vivo, exacerbated renal ischemia-reperfusion injury in animal models and possibly humans. In the present study, we investigated the relationship between ATIII level and contrast induced nephropathy (CIN) in patients and examined therapeutic effect of ATIII on CIN in Sprague-Dawley rats. Patients with low ATIII activity presented a higher incidence of acute kidney injury (AKI) following coronary angiography...
February 12, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28219572/right-coronary-artery-fistula-into-left-ventricle-blood-flow-steal-phenomenon
#15
Chengming Fan, Mi Tang, Jinfu Yang
No abstract text is available yet for this article.
March 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28219559/neovascularization-of-thymoma-from-left-internal-mammary-artery-bypass-graft
#16
Jordan Y Dubique, Harma Turbendian, Danny Chu
We present the case of a type AB thymoma in a 69-year-old man with previous coronary artery bypass grafting (CABG) in whom angiography revealed a left internal mammary artery graft supplying blood flow to a thymic neoplasm, which simultaneously occluded the graft. This required a redo sternotomy, lysis of pericardial adhesions, complete thymectomy, and redo one vessel off-pump CABG. This case seeks to sensitize physicians to the possibility of coronary adverse events in patients with a previous CABG in the setting of management of mediastinal neoplasms, and it presents the novel findings on cardiac imaging associated with this case...
March 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28219356/bacopa-monnieri-extract-increases-rat-coronary-flow-and-protects-against-myocardial-ischemia-reperfusion-injury
#17
Sirintorn Srimachai, Sylvie Devaux, Celine Demougeot, Sarawut Kumphune, Nina D Ullrich, Ernst Niggli, Kornkanok Ingkaninan, Natakorn Kamkaew, C Norman Scholfield, Sompol Tapechum, Krongkarn Chootip
BACKGROUND: This study explored Bacopa monnieri, a medicinal Ayurvedic herb, as a cardioprotectant against ischemia/reperfusion injury using cardiac function and coronary flow as end-points. METHODS: In normal isolated rat hearts, coronary flow, left ventricular developed pressure, heart rate, and functional recovery were measured using the Langendorff preparation. Hearts were perfused with either (i) Krebs-Henseleit (normal) solution, (control), or with 30, 100 μg/ml B...
February 20, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28218606/microvascular-dysfunction-following-st-elevation-myocardial-infarction-and-its-recovery-over-time-is-associated-with-short-and-long-term-cardiac-function
#18
Mariëlla E C J Hassell, Matthijs Bax, Martijn A van Lavieren, Robin Nijveldt, Alexander Hirsch, Lourens Robbers, Koen M Marques, Jan G P Tijssen, Felix Zijlstra, Albert C van Rossum, Ronak Delewi, Jan J Piek
AIMS: It is unclear whether microvascular dysfunction following ST-elevation myocardial infarction (STEMI) is prognostic for long-term left ventricular function (LVF). and whether recovery of the microvasculature status is associated with LVF improvement. METHODS AND RESULTS: In 62 patients, Coronary Flow Reserve (CFR) and Hyperemic Microvascular Resistance Index (HMRI) in the infarct related artery (IRA) was assessed by intracoronary Doppler flow measurements within 1 week and at 4 months...
February 21, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28218221/gene-expressions-underlying-mishandled-calcium-clearance-and-elevated-generation-of-reactive-oxygen-species-in-the-coronary-artery-smooth-muscle-cells-of-chronic-heart-failure-rats
#19
Liang Ding, Xian-Xiu Su, Wen-Hui Zhang, Yu-Xiang Xu, Xue-Feng Pan
BACKGROUND: The calcium clearance and reactive oxygen species (ROS) generations in the coronary artery smooth muscle cells in chronic heart failure (HF) have not been fully investigated. Therefore, we attempted to understand the gene expressions underlying the mishandling of calcium clearance and the accumulations of ROS. METHODS: We initially established an animal model of chronic HF by making the left anterior descending coronary artery ligation (CAL) in rats, and then isolated the coronary artery vascular smooth muscle cells from the ischemic and the nonischemic parts of the coronary artery vessels in 12 weeks after CAL operation...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28217986/the-effects-of-remote-ischemic-conditioning-in-patients-with-st-segment-elevation-myocardial-infarction-treated-with-primary-percutaneous-coronary-intervention-a-meta-analysis
#20
Jing Gao, Qingjie Chen, Fen Liu, Qian Zhao, Bangdang Chen, Yun Zhou, Qiang Zhao, Yitong Ma, Yining Yang
INTRODUCTION: Timely and successful reperfusion is effective at improving outcome in patients presenting with STEMI. However, abrupt restoration of blood flow may cause detrimental myocardial repercussion injury. Remote ischemic conditioning (RIC) is a potent activator of innate protection against ischemia-reperfusion injury. This study assessed remote ischemic conditioning in patients presenting with STEMI treated with primary PCI. EVIDENCE ACQUISITION: Relevant studies were identified through electronic literature search from PubMed, Medline, EMBASE, CNKI, WANFANG, and VIP...
February 17, 2017: Minerva Medica
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