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https://www.readbyqxmd.com/read/28936780/ct-based-spect-attenuation-correction-and-assessment-of-infarct-size-results-from-a-cardiac-phantom-study
#1
Alexander Stephan Kroiss, Stephan Gerhard Nekolla, Georg Dobrozemsky, Thomas Grubinger, Barry Lynn Shulkin, Markus Schwaiger
RATIONALE: Myocardial perfusion SPECT is a commonly performed, well established, clinically useful procedure for the management of patients with coronary artery disease. However, the attenuation of photons from myocardium impacts the quantification of infarct sizes. CT-Attenuation Correction (AC) potentially resolves this problem. This contention was investigated by analyzing various parameters for infarct size delineation in a cardiac phantom model. METHODS: A thorax phantom with a left ventricle (LV), fillable defects, lungs, spine and liver was used...
September 21, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28936091/delayed-onset-reversible-cortical-blindness-after-resuscitation-from-cardiac-arrest
#2
Aaron de Souza, Rainha J de Souza, Varun R Pai Kakode
We present a patient who presented with cortical blindness (CB) 1 week after repeated cardiac arrest while undergoing treatment for an acute myocardial infarction. He had been revived within 5 min in each instance and was apparently neurologically normal until presentation. Magnetic resonance imaging showed subtle hyperintensities on fluid-attenuated inversion recovery and diffusion-weighted imaging in both temporooccipital cortices. A rapid recovery over the next 2 weeks was remarkable for the appearance of metamorphopsia...
August 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28933783/reverse-remodelling-and-myocardial-recovery-in-heart-failure
#3
REVIEW
Gene H Kim, Nir Uriel, Daniel Burkhoff
Advances in medical and device therapies have demonstrated the capacity of the heart to reverse the failing phenotype. The development of normative changes to ventricular size and function led to the concept of reverse remodelling. Among heart failure therapies, durable mechanical circulatory support is most consistently associated with the largest degree of reverse remodelling. Accordingly, research to analyse human tissue after a period of mechanical circulatory support continues to yield a wealth of information...
September 21, 2017: Nature Reviews. Cardiology
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/28930548/l-name-improves-doxycycline-and-ml-7-cardioprotection-from-oxidative-stress
#5
Iwona Bil-Lula, Anna Krzywonos-Zawadzka, Jolanta Sawicka, Dariusz Bialy, Magdalena Wawrzynska, Mieczyslaw Wozniak, Grzegorz Sawicki
Matrix metalloproteinase-2 (MMP-2) mediated degradation of myosin light chain 1 (MLC1) and troponin I (TnI) contributes to myocardial ischemia/reperfusion (I/R) injury. Modifications of MLC1 triggered by oxidative stress are mediated by myosin light chain kinase (MLCK), nitric oxide synthase (NOS), and MMP-2. Previous studies have shown that inhibiting both MLCK and MMP-2 protects against I/R injury. Here, we hypothesized that the addition of NOS inhibitor (L-NAME) at subprotective concentration to the mixture of subprotective concentrations of ML-7 and doxycycline (Doxy), will increase a synergistic cardioprotection of Doxy and ML-7 during I/R...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28928991/stress-cardiomyopathy-managed-with-extracorporeal-support-after-self-injection-of-epinephrine
#6
Bourenne Jeremy, Fresco Raphaëlle, Kerbaul François, Michelet Pierre, Gainnier Marc
A 28-year-old man was admitted to the ICU for self-injection of Epinephrine. This injection resulted in the rapid development of a catecholamine-induced cardiomyopathy (inverted Takotsubo) with a severe cardiogenic shock. The importance of ventricular dysfunction required the implementation of a temporary arteriovenous circulatory support until the recovery of myocardial stunning. This case allows redefining the role of circulatory assistance during cardiotropic agents intoxication.
2017: Case Reports in Critical Care
https://www.readbyqxmd.com/read/28925017/early-treatment-with-resolvin-e1-facilitates-myocardial-recovery-from-ischemia-in-mice
#7
Guizhu Liu, Qian Liu, Yujun Shen, Deping Kong, Yanjun Gong, Bo Tao, Guilin Chen, Shumin Guo, Juanjuan Li, Shengkai Zuo, Yu Yu, Huiyong Yin, Li Zhang, Bin Zhou, Colin D Funk, Jian Zhang, Ying Yu
BACKGROUND AND PURPOSE: An appropriate inflammatory response is necessary for cardiac healing after acute myocardial infarction (MI). Resolvin E1 (RvE1) is an anti-inflammatory and pro-resolution lipid mediator derived from eicosapentaenoic acid. The purpose of this study was to investigate the potential effects of RvE1 on cardiac function recovery after MI in mice. EXPERIMENTAL APPROACH: Acute MI was induced by surgical ligation of the left anterior descending artery (LAD) in mice...
September 19, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28918108/heart-failure-with-recovered-ejection-fraction-in-african-americans-results-from-the-african-american-heart-failure-trial
#8
Kay-Won Chang, Neil Beri, Nghia H Nguyen, Boris Arbit, Sutton Fox, Sean Mojaver, Paul Clopton, S William Tam, Anne L Taylor, Jay N Cohn, Alan S Maisel, Inder S Anand
BACKGROUND: Recent studies have described the entity of heart failure with recovered ejection fraction (HFrecEF), but population specific studies remain lacking. The aim of this study was to characterize patients enrolled in the African-American Heart Failure Trial (A-HeFT) who had significant improvement in their ejection fraction (EF) during the first 6 months of follow-up. METHODS AND RESULTS: Subjects (n = 59) with HFrecEF (improvement in EF from < 35% to > 40% in 6 months) were compared to 259 with heart failure and persistently reduced EF (HFrEF), defined as EF ≤ 40% at 6 month follow-up...
September 13, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28911512/cardioprotective-effects-of-hsp72%C3%A2-administration-on-ischemia-reperfusion-injury
#9
Takashi Tanimoto, Missag H Parseghian, Takehiro Nakahara, Hideki Kawai, Navneet Narula, Dongbin Kim, Robert Nishimura, Richard H Weisbart, Grace Chan, Richard A Richieri, Nezam Haider, Farhan Chaudhry, Glenn T Reynolds, John Billimek, Francis G Blankenberg, Partho P Sengupta, Artiom D Petrov, Takashi Akasaka, H William Strauss, Jagat Narula
BACKGROUND: Although early reperfusion is the most desirable intervention after ischemic myocardial insult, it may add to damage through oxidative stress. OBJECTIVES: This study investigated the cardioprotective effects of a single intravenous dose of heat shock protein-72 (HSP72) coupled to a single-chain variable fragment (Fv) of monoclonal antibody 3E10 (3E10Fv) in a rabbit ischemia-reperfusion model. The Fv facilitates rapid transport of HSP72 into cells, even with intact membranes...
September 19, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28906529/the-effect-of-iloprost-and-sildenafil-alone-and-in-combination-on-myocardial-ischaemia-and-nitric-oxide-and-irisin-levels
#10
Suna Aydin, Tuncay Kuloglu, Suleyman Aydin, Meltem Yardim, Davut Azboy, Zeki Temizturk, Ali Kemal Kalkan, Mehmet Nesimi Eren
AIM: Insufficient oxygen supply to organs and tissues due to reduced arterial or venous blood flow results in ischaemia, during which, although ATP production stops, AMP and adenosine continue to be produced from ATP. The fate of irisin, which causes the production of heat instead of ATP during ischaemia, is unknown. Iloprost and sildenafil are two pharmaceutical agents that mediate the resumption of reperfusion (blood supply) via vasodilatation during ischaemic conditions. Our study aimed to explore the effects of iloprost and sildenafil on irisin levels in the heart, liver and kidney tissues and whether these pharmaceutical agents had any impact on serum irisin and nitric oxide levels in rats with induced experimental myocardial ischaemia...
August 31, 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/28903498/from-the-cover-lifelong-exposure-of-c57bl-6n-male-mice-to-bisphenol-a-or-bisphenol-s-reduces-recovery-from-a-myocardial-infarction
#11
Amanda Kasneci, Jun Seong Lee, Tae Jin Yun, Jijun Shang, Shaun Lampen, Tamar Gomolin, Cheolho C Cheong, Lorraine E Chalifour
Bisphenol A (BPA) leaches from plastics to contaminate foodstuffs. Analogs, such as bisphenol S (BPS), are now used increasingly in manufacturing. Greater BPA exposure has been correlated with exacerbation of cardiovascular disease, including myocardial infarction (MI). To test the hypothesis that bisphenol exposure impairs cardiac healing, we exposed C57bl/6n mice to water containing 25ng/ml BPA or BPS from conception and surgically induced an MI in adult male progeny. Increased early death and cardiac dilation, and reduced cardiac function were found post-MI in BPA- and BPS-exposed mice...
September 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28889959/metabolic-profiles-revealed-anti-ischemia-reperfusion-injury-of-yangxinshi-tablet-in-rats
#12
Hai Zhang, Yahong Zhao, Zhengxiang Xia, Hongli Du, Yue Gao, Dan Xue, Zhenyu Zhu, Yifeng Chai
ETHNOPHARMACOLOGICAL RELEVANCE: Myocardial ischemia-reperfusion (I/R) injury is a serious injury that is resulted from the recovery of blood supply after myocardial ischemia. Yangxinshi tablet is a compound Chinese herbal preparation and often used to alleviate the myocardial ischemia in clinical, but its protective mechanism of anti-myocardial ischemia reperfusion injury remains unclear. The objective of this study was to evaluate the anti-I/R injury effect of Yangxinshi tablet on a myocardial I/R rat model and to identify serum biomarker metabolites associated with I/R based on ultra-high performance liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry (UHPLC-QTOF/MS) metabolomic method, and explore the metabolic mechanism of anti-I/R injury of Yangxinshi tablet...
September 7, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28878124/reversal-of-pathological-cardiac-hypertrophy-via-the-mef2-coregulator-interface
#13
Jianqin Wei, Shaurya Joshi, Svetlana Speransky, Christopher Crowley, Nimanthi Jayathilaka, Xiao Lei, Yongqing Wu, David Gai, Sumit Jain, Michael Hoosien, Yan Gao, Lin Chen, Nanette H Bishopric
Cardiac hypertrophy, as a response to hemodynamic stress, is associated with cardiac dysfunction and death, but whether hypertrophy itself represents a pathological process remains unclear. Hypertrophy is driven by changes in myocardial gene expression that require the MEF2 family of DNA-binding transcription factors, as well as the nuclear lysine acetyltransferase p300. Here we used genetic and small-molecule probes to determine the effects of preventing MEF2 acetylation on cardiac adaptation to stress. Both nonacetylatable MEF2 mutants and 8MI, a molecule designed to interfere with MEF2-coregulator binding, prevented hypertrophy in cultured cardiac myocytes...
September 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/28875959/downregulation-of-na-ca-2-exchanger-isoform-1-protects-isolated-hearts-by-sevoflurane-postconditioning-but-not-by-delayed-remote-ischemic-preconditioning-in-rats
#14
Yang Yu, Cheng-Hui Zhou, Yun-Tai Yao, Li-Huan Li
Background: Calcium regulatory proteins-L-type Ca(2+) channels (LTCCs), ryanodine receptor 2 (RyR2), and Na(+)/Ca(2+) exchanger isoform 1 (NCX1) have been recognized as important protective mechanisms during myocardial ischemia-reperfusion injury (I/RI). Both sevoflurane postconditioning (SevoPoC) and delayed remote ischemic preconditioning (DRIPC) have been shown to protect the heart against I/RI. In this study, we aimed to compare the effects of SevoPoC and DRIPC on the expression of the three calcium regulatory proteins in an isolated rat heart model...
September 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28875946/pva-dextran-hydrogel-patches-as-delivery-system-of-antioxidant-astaxanthin-a-cardiovascular-approach
#15
Marisol Zuluaga, Giulia Gregnanin, Claudia Cencetti, Chiara Di Meo, Virginie Gueguen, Didier Letourneur, Anne Meddahi-Pellé, Graciela Pavon-Djavid, Pietro Matricardi
After myocardial infarction, the heart's mechanical properties and its intrinsic capability to recover are compromised. To improve this recovery, several groups have developed cardiac patches based on different biomaterials strategies. Here, we developed polyvinylalcohol/dextran (PVA/Dex) elastic hydrogel patches, obtained through the freeze thawing (FT) process, with the aim to deliver locally a potent natural antioxidant molecule, astaxanthin, and to assist the heart's response against the generated myofibril stress...
September 6, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28875096/narrow-complex-ventricular-tachycardia
#16
Murtaza Sundhu, Mehmet Yildiz, Sajjad Gul, Mubbasher Syed, Idrees Azher, Robert Mosteller
Myocardial infarctions are frequently complicated by tachyarrhythmias, which commonly have wide QRS complexes (QRS duration > 120 milliseconds). Many published criteria exist to help differentiate between ventricular and supraventricular mechanisms. We present a case of a 61-year-old male with a history of hypertension, hyperlipidemia and coronary artery disease with prior stenting of the right coronary artery (RCA). He had been noncompliant with his antiplatelet medication and presented with cardiac arrest secondary to in-stent thrombosis...
July 4, 2017: Curēus
https://www.readbyqxmd.com/read/28870848/sevoflurane-induced-cardioprotection-in-coronary-artery-bypass-graft-surgery-randomised-trial-with-clinical-and-ex-vivo-endpoints
#17
Sandrine Lemoine, Lan Zhu, Jean-Louis Grard, Jean-Luc Hanouz
BACKGROUND: Myocardial ischemia reperfusion injury following cardiac surgery with cardiopulmonary bypass increases postoperative mortality. Setting techniques to protect the heart during this critical period therefore represents a considerable challenge. METHOD: A randomised controlled study in Caen University Hospital Centre, investigated whether the clinical cardio protective effects of administration sevoflurane before cardiopulmonary bypass during coronary artery bypass graft surgery (CABG) could translate into protected atrial trabeculae contractility against hypoxia-reoxygenation in vitro...
September 1, 2017: Anaesthesia, Critical Care & Pain Medicine
https://www.readbyqxmd.com/read/28868316/a-rare-and-late-complication-after-left-ventricular-assist-device-explantation
#18
George Gradinariu, André R Simon, Jullien Gaer
Late complications can arise after explantation of a left ventricular assist device. We report the case of a patient who presented at the age of 19 years with peri-partum cardiomyopathy and was initially managed with a biventricular support device, which was subsequently upgraded to an ambulatory left ventricular assist device. This was successfully explanted after myocardial recovery via a minimally invasive approach 7 months later. The patient re-presented 5 years following explantation with hemoptysis. At redo sternotomy, a 10-cm remnant of the outflow graft was found to be eroding the surface of the right lung...
April 2017: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/28866415/psychological-sequelae-of-myocardial-infarction
#19
REVIEW
Mukesh Kumar, Prasanta Kumar Nayak
Patient with myocardial infarction (MI) are often affected by psychological disorders such as depression, anxiety, and post-traumatic stress disorder. Psychological disorders are disabling and have a negative influence on recovery, reduce the quality of life and causes high mortality rate in MI patients. Despite tremendous advancement in technologies, screening scales, and treatment strategies, psychological sequelae of MI are currently understudied, underestimated, underdiagnosed, and undertreated. Depression is highly prevalent in MI patients followed by anxiety and post-traumatic stress disorder...
August 31, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28865896/comparison-of-electrocardiographic-characteristics-in-men-versus-women%C3%A2-%C3%A2-%C3%A2-55-years-with-acute-myocardial-infarction-a-variation-in-recovery-role-of-gender-on-outcomes-of-young-acute-myocardial-infarction-patients-substudy
#20
José A Barrabés, Aakriti Gupta, Andreu Porta-Sánchez, Kelly M Strait, J Gabriel Acosta-Vélez, Gail D'Onofrio, Rosa-Maria Lidón, Mary Geda, Rachel P Dreyer, Nancy P Lorenze, Judith H Lichtman, John A Spertus, Héctor Bueno, Harlan M Krumholz
Young women with acute myocardial infarction (AMI) have a worse prognosis than their male counterparts. We searched for differences in the electrocardiographic presentation of men and women in a large, contemporary registry of young adults with AMI that could help explain gender differences in outcomes. The qualifying electrocardiogram was blindly assessed by a central core lab in 3,354 patients (67% women) aged 18 to 55 years included in the Variation in Recovery: Role of Gender on Outcomes of Young AMI Patients study...
August 8, 2017: American Journal of Cardiology
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