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ischemic conditioning

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https://www.readbyqxmd.com/read/28087308/myocardial-inotropic-reserve-an-old-twist-that-constitutes-a-reliable-index-in-the-modern-era-of-heart-failure
#1
REVIEW
Fragkiskos Parthenakis, Spyridon Maragkoudakis, Maria Marketou, Alexandros Patrianakos, Evaggelos Zacharis, Panos Vardas
Current national and international guidelines, including those of the European Society of Cardiology, recognize that the assessment of prognosis should be a part of the standard management for patients with chronic heart failure (CHF). However, these same guidelines recognize the inherent difficulty of this process. A variety of factors contribute to this difficulty, including the varying etiology, frequent co-morbidity and, perhaps most importantly, huge inter-individual variability in the disease progression and outcome...
November 22, 2016: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28086885/harnessing-the-early-post-injury-inflammatory-responses-for-cardiac-regeneration
#2
REVIEW
Bill Cheng, H C Chen, I W Chou, Tony W H Tang, Patrick C H Hsieh
Cardiac inflammation is considered by many as the main driving force in prolonging the pathological condition in the heart after myocardial infarction. Immediately after cardiac ischemic injury, neutrophils are the first innate immune cells recruited to the ischemic myocardium within the first 24 h. Once they have infiltrated the injured myocardium, neutrophils would then secret proteases that promote cardiac remodeling and chemokines that enhance the recruitment of monocytes from the spleen, in which the recruitment peaks at 72 h after myocardial infarction...
January 13, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28078859/role-of-vitacamphore-in-improving-central-pro-inflammatory-cytokines-following-transient-global-ischemia
#3
J Lin, L Pang, X L Liu, J Xing
Pro-inflammatory cytokines (PICs) including interleukin-1β (IL-1β), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) are responsive to ischemic stress. This process thereby modulates the responsiveness of many cell types under diseased conditions. The current study was to examine the role played by vitacamphore (VCP) in regulating the levels of PICs and protein expression of PIC receptors in the cerebral cortex and hippocampus of rats after cardiac arrest (CA)-induced transient global ischemia. CA was induced by asphyxia followed by cardiopulmonary resuscitation (CPR) in rats...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28077713/reversible-disruption-of-neuronal-mitochondria-by-ischemic-and-traumatic-injury-revealed-by-quantitative-two-photon-imaging-in-the-neocortex-of-anesthetized-mice
#4
Mikhail Kislin, Jeremy Sword, Ioulia V Fomitcheva, Deborah Croom, Evgeny Pryazhnikov, Eero Lihavainen, Dmytro Toptunov, Heikki Rauvala, Andre S Ribeiro, Leonard Khiroug, Sergei A Kirov
: Mitochondria play a variety of functional roles in cortical neurons, from metabolic support and neuroprotection to the release of cytokines that trigger apoptosis. In dendrites, mitochondrial structure is closely linked to their function, and fragmentation (fission) of the normally elongated mitochondria indicates loss of their function under pathological conditions, such as stroke and brain trauma. Using in vivo two-photon microscopy in mouse brain, we quantified mitochondrial fragmentation in a full spectrum of cortical injuries, ranging from severe to mild...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28077495/left-ventricular-wall-motion-abnormalities-are-associated-with-stroke-recurrence
#5
Jeong-Yoon Choi, Jaehyung Cha, Jin-Man Jung, Woo-Keun Seo, Kyungmi Oh, Kyung-Hee Cho, Sungwook Yu
OBJECTIVE: To investigate the role of left ventricular wall motion abnormalities (LVWMA), unrelated to high-risk cardioembolic conditions, in stroke recurrence. METHODS: This study included consecutive acute ischemic stroke patients. Transthoracic echocardiography was performed as a routine evaluation for stroke patients. The outcomes were the time to recurrent any stroke and ischemic stroke. RESULTS: Among 4,316 acute ischemic stroke patients, 430 had LVWMA without high-risk cardioembolic sources...
January 11, 2017: Neurology
https://www.readbyqxmd.com/read/28077334/the-neuroprotective-compound-p7c3-a20-promotes-neurogenesis-and-improves-cognitive-function-after-ischemic-stroke
#6
Zachary B Loris, Andrew A Pieper, W Dalton Dietrich
Ischemic stroke is a devastating condition with few therapeutic interventions available. The neuroprotective compound P7C3-A20 inhibits mature neuronal cell death while also increasing the net magnitude of postnatal neurogenesis in models of neurodegeneration and acute injury. P7C3 compounds enhance flux of nicotinamide adenine dinucleotide (NAD) in mammalian cells, a proposed therapeutic approach to treating cerebral ischemia. The effectiveness of P7C3-A20 treatment on chronic histopathological and behavioral outcomes and neurogenesis after ischemic stroke has not previously been established...
January 8, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28075499/long-term-outcome-following-remote-ischemic-postconditioning-during-percutaneous-coronary-interventions-the-rip-pci-trial-long-term-follow-up
#7
Shahar Lavi, Nour Abu-Romeh, Sabrina Wall, Mistre Alemayehu, Ronit Lavi
The clinical value of ischemic conditioning during percutaneous coronary intervention (PCI) and mode of administration is controversial. Our aim was to assess the long-term effect of remote ischemic postconditioning among patients undergoing PCI. We randomized 360 patients undergoing PCI who presented with a negative troponin T at baseline into 3 groups: 2 groups received remote ischemic postconditioning (with ischemia applied to the arm in 1 group and to the thigh in the other group), and the third group acted as a control group...
January 11, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28073365/neurophthalmological-conditions-mimicking-glaucomatous-optic-neuropathy-analysis-of-the-most-common-causes-of-misdiagnosis
#8
Diego Torres Dias, Michele Ushida, Roberto Battistella, Syril Dorairaj, Tiago Santos Prata
BACKGROUND: To analyze the most common neurophthalmological conditions that may mimic glaucomatous optic neuropathy and to determine which most often lead to misdiagnosis when evaluated by a glaucoma specialist. METHODS: We reviewed the charts of consecutive patients with optic neuropathies caused by neurophthalmological conditions screened in a single Eye Clinic within a period of 24 months. Within these enrolled patients, we selected the eyes whose fundoscopic appearance could resemble glaucoma based in pre-defined criteria (vertical cup-to-disc ratio ≥0...
January 10, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28070749/an-automated-microemboli-detection-and-classification-system-using-backscatter-rf-signals-and-differential-evolution
#9
Karim Ferroudji, Nabil Benoudjit, Ayache Bouakaz
Embolic phenomena, whether air or particulate emboli, can induce immediate damages like heart attack or ischemic stroke. Embolus composition (gaseous or particulate matter) is vital in predicting clinically significant complications. Embolus detection using Doppler methods have shown their limits to differentiate solid and gaseous embolus. Radio-frequency (RF) ultrasound signals backscattered by the emboli contain additional information on the embolus in comparison to the traditionally used Doppler signals...
January 9, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28069702/remote-ischemic-conditioning-provides-humoural-cross-species-cardioprotection-through-glycine-receptor-activation
#10
Juan José Alburquerque-Béjar, Ignasi Barba, Laura Valls-Lacalle, Marisol Ruiz-Meana, Michela Pecoraro, Antonio Rodríguez-Sinovas, David García-Dorado
AIMS: Remote ischaemic conditioning (RIC) releases a humoural factor able to exert cross-species cardioprotection when plasma dialysate is applied to isolated hearts. However, the exact chemical nature of this factor is currently unknown. METHODS AND RESULTS: RIC (4 × 5min femoral occlusion/5min reperfusion) was applied to 10 male pigs, and blood was taken before and after the manoeuvre. Discriminant analysis of (1)H-NMR spectra (n = 10-12) obtained from plasma dialysates (12-14 kDa cut-off) allowed to demonstrate a different metabolic profile between control and postRIC samples, with lactate (2...
January 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28069695/remote-ischemic-conditioning-the-enigmatic-transfer-of-protection
#11
EDITORIAL
Gerd Heusch
No abstract text is available yet for this article.
January 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28065779/effects-of-panax-notoginseng-ginsenoside-rb1-on-abnormal-hippocampal-microenvironment-in-rats
#12
Shiyun Wang, Minghong Li, Ying Guo, Chen Li, Lanou Wu, Xin-Fu Zhou, Yaohui Luo, Dong An, Shude Li, Haiyun Luo, Lijin Pu
: Cerebral ischemia damages central neurons, and abnormal microenvironment in ischemic condition is the key factor to the damages. The increase of local concentration of glutamic acid, the overload of Ca(2+), and the mitochondrial stress caused by release of cytochrome C are important factors of abnormal microenvironment in cerebral ischemia. In this study ginsenoside Rb1, a compound from Panax Notoginseng, was used to intervene abnormal environment of neurons in the hippocampal CA1 region in two animal models (microperfusion model and photothrombosis model)...
January 5, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28065616/experience-on-mechanical-thrombectomy-for-acute-stroke-treatment-in-a-brazilian-university-hospital
#13
Guilherme S Nakiri, Luis H Castro-Afonso, Lucas M Monsignore, Francisco A Dias, Frederico F Alessio-Alves, Soraia Ramos C Fabio, Millene R Camilo, Pedro T Cougo-Pinto, Octavio M Pontes-Neto, João Pereira Leite, Daniel G Abud
BACKGROUND: Brazil is a developing country struggling to reduce its extreme social inequality, which is reflected on shortage of health-care infrastructure, mainly to the low-income class, which depends exclusively on the public health system. In Brazil, less than 1% of stroke patients have access to intravenous thrombolysis in a stroke unit, and constraints to the development of mechanical thrombectomy in the public health system increase the social burden of stroke. OBJECTIVE: Report the feasibility of mechanical thrombectomy as part of routine stroke care in a Brazilian public university hospital...
January 5, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28065491/meta-analysis-of-randomized-trials-on-remote-ischemic-conditioning-during-primary-percutaneous-coronary-intervention-in-patients-with-st-segment-elevation-myocardial-infarction
#14
Ayman Elbadawi, Le Dung Ha, Ahmed S Abuzaid, Gabriele Crimi, Muhammad S Azzouz
Ischemia/reperfusion injury adversely affects the final infarct size (IS) after primary percutaneous coronary intervention (PCI) in patients with ST-segment elevation myocardial infarction (STEMI). Few studies have evaluated the role of remote ischemic conditioning (RIC) in reducing ischemia/reperfusion injury. However, the results of these studies were not consistent, and an overview of overall effectiveness of this technique in patients with STEMI is lacking. We conducted this meta-analysis to evaluate the available evidence in literature regarding the application of RIC in patients with STEMI who underwent primary PCI...
December 21, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/28064357/ischemic-stroke-experimental-models-and-reality
#15
REVIEW
Clemens J Sommer
The vast majority of cerebral stroke cases are caused by transient or permanent occlusion of a cerebral blood vessel ("ischemic stroke") eventually leading to brain infarction. The final infarct size and the neurological outcome depend on a multitude of factors such as the duration and severity of ischemia, the existence of collateral systems and an adequate systemic blood pressure, etiology and localization of the infarct, but also on age, sex, comorbidities with the respective multimedication and genetic background...
January 7, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28064332/the-endovascular-treatment-of-bilateral-infarction-of-middle-cerebellar-peduncles-etiology-and-endovascular-treatment-analysis
#16
Qihao Dong, Guoxian Jing, Ju Han
Infarction of the symmetrical middle cerebellar peduncles is often induced by ischemic cerebrovascular disease. Adams described the anterior inferior cerebellar artery (AICA) syndrome as early as 1943, but clinical and imaging studies following this failed to shed more light regarding the condition until the advent of magnetic resonance imaging that comprehension regarding AICA improved significantly. Infarction of the middle cerebellar peduncles (MCP) is uncommon and the endovascular treatment of this condition is even more rare...
January 2017: Neurosciences: the Official Journal of the Pan Arab Union of Neurological Sciences
https://www.readbyqxmd.com/read/28062614/myocardial-infarction-type-2-and-myocardial-injury
#17
REVIEW
Yader Sandoval, Kristian Thygesen
BACKGROUND: The development and implementation of sensitive and high-sensitivity cardiac troponin assays has not only expedited the early ruling in and ruling out of acute myocardial infarction, but has also contributed to the identification of patients at risk for myocardial injury with necrosis, as confirmed by the presence of cardiac troponin concentrations above the 99th percentile. Myocardial injury with necrosis may occur either in the presence of overt ischemia from myocardial infarction, or in the absence of overt ischemia from myocardial injury accompanying other conditions...
January 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28060997/effect-of-hypercholesterolemia-on-myocardial-function-ischemia-reperfusion-injury-and-cardioprotection-by-preconditioning-postconditioning-and-remote-conditioning
#18
REVIEW
Ioanna Andreadou, Efstathios K Iliodromitis, Antigone Lazou, Anikó Görbe, Zoltán Giricz, Rainer Schulz, Péter Ferdinandy
Hypercholesterolemia is considered to be a principle risk factor for cardiovascular disease, having direct negative effects on the myocardium itself, in addition to the development of atherosclerosis. Since hypercholesterolemia affects global cardiac gene expression profile, among many other factors, increased myocardial oxidative stress, mitochondrial dysfunction and inflammation trigger apoptosis and this may account for myocardial dysfunction and increased susceptibility of the myocardium to infarction. In addition, numerous experimental and clinical studies revealed that hyperlcholesterolemia may interfere with the cardioprotective potential of conditioning mechanisms...
January 6, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28055998/-hypertensive-crisis-urgency-and-hypertensive-emergency
#19
Javier Sobrino Martínez, Mónica Doménech Feria-Carot, Alberto Morales Salinas, Antonia Coca Payeras
Hypertensive crises lumped several clinical situations with different seriousness and prognosis. The differences between hypertensive urgency and hypertensive emergency depends on if this situation involves a vital risk for the patient. This risk is defined more by the severity of the organ damage than for the higher values of blood pressure. The hypertensive urgency not involves an immediately risk for the patient, for these reason, the treatment can be completed after discharged. Otherwise, the hypertensive emergency is a critical clinical condition that requires hospital assistance...
November 18, 2016: Medwave
https://www.readbyqxmd.com/read/28054002/data-on-pharmacological-applications-and-hypothermia-protection-against-in-vitro-oxygen-glucose-deprivation-related-neurodegeneration-of-adult-rat-ca1-region
#20
Pınar Öz, Hale Saybaşılı
In this data article, the level of chemical neuroprotection against oxygen-glucose-deprivation (OGD)-related neurodegeneration in CA1 was analyzed using the measurements on CA1 stratum pyramidale (CA1sp) width. Adult rat hippocampal slices were incubated in OGD medium for 60 min to create a model for severe ischemic conditions. Alternatively, control slices were incubated in artificial cerebrospinal fluid (ACSF) for 60 min. A study of OGD induced neurodegeneration and partial prevention by pharmacological agents reported; baclofen, memantine and l-carnitine effects were included...
February 2017: Data in Brief
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