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Cardiac perfusion

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https://www.readbyqxmd.com/read/28805266/hypothermic-pulsatile-preservation-of-kidneys-from-uncontrolled-deceased-donors-after-cardiac-arrest
#1
Xavier Matillon, Fabrice Danjou, Palmina Petruzzo, Olivier Thaunat, Thomas Rimmele, Claire Delsuc, Alexandre Faure, Maud Rabeyrin, Vannary Meas Yedid, William Hanf, Emmanuel Morelon, Lionel Badet, Ricardo Codas
Kidneys from uncontrolled donors after cardiac arrest (uDCD) suffer from a period of warm ischemia between cardiac arrest and cold flushing. Aim of the study was to evaluate renal outcomes of uDCD kidneys selected on the basis of renal Resistance Index (RI) and its influence on graft function and survival. The study included 44 kidneys procured from 26 uDCD starting 1.1.2006 until 31.12.2013. The donors (Maastricht category II) underwent cardiopulmonary resuscitation by assisted ventilation and chest compression; the organs were preserved with "in situ" cold perfusion or a normothermic regional perfusion...
August 14, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28804641/breast-cancer-detected-as-an-incidental-finding-on-99m-tc-mibi-scintigraphy
#2
Toshihiro Homma, Osamu Manabe, Kazuomi Ichinokawa, Hiroko Yamashita, Noriko Oyama-Manabe, Fumi Kato, Kenji Hirata, Markus Kroenke, Nagara Tamaki
We report a case of breast cancer detected as an incidental finding on (99m)Tc-MIBI scintigraphy. (99m)Tc-MIBI scintigraphy is usually used to evaluate cardiac perfusion or to detect ectopic parathyroid adenomas; however, it is also known to sensitively detect breast cancer. Accordingly, a few reports have described the incidental detection of breast cancer by (99m)Tc-MIBI scintigraphy performed to detect parathyroid adenoma. Our present case underscores the importance of attending to any incidental findings when searching for parathyroid adenomas using (99m)Tc-MIBI scintigraphy...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28803773/low-dose-versus-high-dose-tranexamic-acid-reduces-the-risk-of-nonischemic-seizures-after-cardiac-surgery-with-cardiopulmonary-bypass
#3
Pierre Couture, Jean-Sébastien Lebon, Éric Laliberté, Georges Desjardins, Marie-Ève Chamberland, Christian Ayoub, Antoine Rochon, Jennifer Cogan, André Denault, Alain Deschamps
OBJECTIVE: The incidence of postoperative nonischemic seizures associated with the use of tranexamic acid (TXA) and the possibility of prevention with a low-dose regimen of TXA were evaluated. DESIGN: Retrospective study. SETTING: Tertiary care university hospital. PARTICIPANTS: A total of 12,195 patients who underwent cardiac surgical procedures under cardiopulmonary bypass (CPB) were evaluated. INTERVENTIONS: The files of every clinical seizure case diagnosed in the surgical intensive care unit between April 2006 and April 2014 were reviewed...
April 15, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28803639/atrial-fibrillation-and-stroke-as-initial-manifestations-of-painless-type-a-aortic-dissection
#4
Claudia Stöllberger, Lilian Schäffl-Doweik, Maria Korn, Josef Finsterer
Aortic dissection is diagnostically challenging, especially in pain-free patients. Detection of acute ischemic stroke secondary to painless aortic dissection is a challenge for emergency physicians and neurologists. We report a previously healthy 58-years old female, admitted because of nausea, dizziness, somnolence, a left-sided hemiparesis and arterial hypotension. The electrocardiogram showed atrial fibrillation with ST-elevations and ST-depressions. Perfusion CT-imaging showed a dilatation of the aortic arch and intraluminal structures indicating an intima flap of aortic dissection...
July 21, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28801645/chronic-intermittent-hypobaric-hypoxia-improves-cardiac-function-through-inhibition-of-endoplasmic-reticulum-stress
#5
Fang Yuan, Li Zhang, Yan-Qing Li, Xu Teng, Si-Yu Tian, Xiao-Ran Wang, Yi Zhang
We investigated the role of endoplasmic reticulum stress (ERS) in chronic intermittent hypobaric hypoxia (CIHH)-induced cardiac protection. Adult male Sprague-Dawley rats were exposed to CIHH treatment simulating 5000 m altitude for 28 days, 6 hours per day. The heart was isolated and perfused with Langendorff apparatus and subjected to 30-min ischemia followed by 60-min reperfusion. Cardiac function, infarct size, and lactate dehydrogenase (LDH) activity were assessed. Expression of ERS molecular chaperones (GRP78, CHOP and caspase-12) was assayed by western blot analysis...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801525/exercise-of-obese-mice-induces-cardioprotection-and-oxygen-sparing-in-hearts-exposed-to-high-fat-load
#6
Neoma T Boardman, Anne Dragøy Hafstad, Jim Lund, Line Rossvoll, Ellen Aasum
Exercise training is a potent, therapeutic approach in obesity and diabetes that exerts protective effects against development of diabetic cardiomyopathy and ischemic-injury. Acute increases in circulating fatty acids (FAs) during an ischemic insult can challenge the heart, as high FA-load is considered to have adverse cardiac effects. In the present study, we tested the hypothesis that exercise-induced cardiac effects in diet-induced obese mice are abrogated by an acute high FA-load. Diet-induced obese mice were fed a high-fat diet (HFD) for 20 weeks...
August 11, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28801416/outcome-of-revascularisation-in-stable-coronary-artery-disease-without-ischaemia-a-danish-registry-based-follow-up-study
#7
Jane Angel Simonsen, Hans Mickley, Allan Johansen, Søren Hess, Anders Thomassen, Oke Gerke, Lisette O Jensen, Jesper Hallas, Werner Vach, Poul F Hoilund-Carlsen
OBJECTIVES: In stable coronary artery disease (CAD), coronary revascularisation may reduce mortality of patients with a certain amount of left ventricular myocardial ischaemia. However, revascularisation does not always follow the guidance suggested by ischaemia testing. We compared outcomes in patients without ischaemia who had either revascularisation or medical treatment. DESIGN AND POPULATION: Based on registries, 1327 consecutive patients with normal myocardial perfusion scintigraphy (MPS) and 278 with fixed perfusion defects were followed for a median of 6...
August 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28801275/air-blood-barrier-phenotype-correlates-with-alveolo-capillary-o2-equilibration-in-hypobaric-hypoxia
#8
Beretta Egidio, Lanfranconi Francesca, Grasso Gabriele Simone, Bartesaghi Manuela, Alemayehu Hailu Kinfu, Pratali Lorenza, Catuzzo Bruna, Giardini Guido, Miserocchi Giuseppe
The O2 diffusion limitation across the air blood barrier (DO2 and subcomponents Dm and Vc) was evaluated in 17 healthy participants exposed to hypobaric hypoxia (HA, 3840m, PIO2 ∼90mmHg). A 10% decrease in alveolar volume (VA) in all participants suggested the development of sub-clinical interstitial lung edema. In >80% of participants DO2/VA increased, reflecting an individual strategy to cope with the hypoxia stimulus by remodulating Vc or Dm. Opposite changes in Dm/Vc ratio were observed and participants decreasing Vc showed reduced alveolar blood capillary transit time...
August 8, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28801040/extracorporeal-cardiopulmonary-resuscitation-for-blunt-cardiac-rupture-a-case-report
#9
Shunsuke Kudo, Keiji Tanaka, Kunihiko Okada, Takahiro Takemura
Extracorporeal cardiopulmonary resuscitation (ECPR) followed by operating room sternotomy, rather than resuscitative thoracotomy, might be life-saving for patients with blunt cardiac rupture and cardiac arrest who do not have multiple severe traumatic injuries. A 49-year-old man was injured in a vehicle crash and transferred to the emergency department. On admission, he was hemodynamically stable, but a plain chest radiograph revealed a widened mediastinum, and echocardiography revealed hemopericardium. A computed tomography scan revealed hemopericardium and mediastinal hematoma, without other severe traumatic injuries...
August 5, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28800676/development-and-evaluation-of-heartbeat-a-machine-perfusion-heart-preservation-system
#10
Yongnan Li, Qingdong Zeng, Gang Liu, Junzhe Du, Bingren Gao, Wei Wang, Zhe Zheng, Shengshou Hu, Bingyang Ji
Static cold storage is accompanied with a partial safe ischemic interval for donor hearts. In this current study, a machine perfusion system was built to provide a better preservation for the donor heart and assessment for myocardial function. Chinese mini-swine (weight 30-35 kg, n = 16) were randomly divided into HTK, Celsior, and Heartbeat groups. All donor hearts were respectively preserved for 8 hours under static cold storage or machine perfusion. The perfusion solution is aimed to maintain its homeostasis based on monitoring the Heartbeat group...
August 11, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28797357/stress-perfusion-coronary-flow-reserve-versus-cardiac-magnetic-resonance-for-known%C3%A2-or%C3%A2-suspected-cad
#11
Shingo Kato, Naka Saito, Tatsuya Nakachi, Kazuki Fukui, Tae Iwasawa, Masataka Taguri, Masami Kosuge, Kazuo Kimura
BACKGROUND: Phase-contrast (PC) cine magnetic resonance imaging (MRI) of the coronary sinus is a noninvasive method to quantify coronary flow reserve (CFR). OBJECTIVES: This study sought to compare the prognostic value of CFR by cardiac magnetic resonance (CMR) and stress perfusion CMR to predict major adverse cardiac events (MACE). METHODS: Participants included 276 patients with known coronary artery disease (CAD) and 400 with suspected CAD...
August 15, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28796027/heart-fat-in-hiv-marker-or-mediator-of-risk
#12
Jonathan Buggey, Chris T Longenecker
PURPOSE OF REVIEW: The review aims to summarize the literature describing the clinical impact of cardiac fat depots in patients with HIV infection. RECENT FINDINGS: People living with HIV (PLHIV) have accelerated rates of cardiovascular disease, and are prone to the development of ectopic fat deposition. Specifically, PLHIV have higher volumes of epicardial and intracardiac fat quantified by noninvasive imaging. Higher volumes of epicardial fat may be related to antiretroviral therapy duration and chronic inflammation, independently of other measures of body adiposity such as BMI...
August 8, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28793822/dose-response-head-to-head-comparison-of-inodilators-dobutamine-milrinone-and-levosimendan-in-chronic-experimental-pulmonary-hypertension
#13
Marta Tavares-Silva, Mohamed Alaa, Sara Leite, José Oliveira-Pinto, Lucas Lopes, Adelino F Leite-Moreira, André P Lourenço
The choice of inodilator drug in the acute management of patients with pulmonary hypertension (PH) having right ventricular (RV) failure remains unsettled and challenging. Comprehensive experimental evaluations may provide further insight and fundamental translational research clues to support inodilator selection and clinical trial design. Our aim was to compare acute dose-response hemodynamic effects of inodilators dobutamine (DOB), milrinone (MIL), and levosimendan (LEV) in chronic experimental PH. Seven-week-old male Wistar rats were randomly injected with 60 mg·kg(-1) monocrotaline (MCT) or vehicle (Ctrl, n = 7) and underwent systemic and pulmonary artery (PA) pressure and RV pressure-volume (PV) hemodynamic evaluation under halogenate anesthesia 24 to 30 days after injection...
September 2017: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28792136/impact-of-follow-up-ischemia-on-myocardial-perfusion-single-photon-emission-computed-tomography-in-patients-with-coronary-artery-disease
#14
Se Hun Kang, Hyo In Choi, Young Hak Kim, Eun Young Lee, Jung Min Ahn, Seungbong Han, Pil Hyung Lee, Jae Hyung Roh, Sung Han Yun, Duk Woo Park, Soo Jin Kang, Seung Whan Lee, Cheol Whan Lee, Dae Hyuk Moon, Seong Wook Park, Seung Jung Park
PURPOSE: Few studies have reported on predicting prognosis using myocardial perfusion single-photon emission computed tomography (SPECT) during coronary artery disease (CAD) treatment. Therefore, we aimed to assess the clinical implications of myocardial perfusion SPECT during follow-up for CAD treatment. MATERIALS AND METHODS: We enrolled 1153 patients who had abnormal results at index SPECT and underwent follow-up SPECT at intervals ≥6 months. Major adverse cardiac events (MACE) were compared in overall and 346 patient pairs after propensity-score (PS) matching...
September 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28791621/assessment-of-dyssynchrony-by-gated-myocardial-perfusion-imaging-does-not-improve-patient-management
#15
Ran Lee, Ravi V Shah, Venkatesh L Murthy
Clinical trials have demonstrated improved outcomes with cardiac resynchronization therapy in patients with heart failure and electrical evidence of dyssynchrony. There has been intense effort at developing imaging markers of dyssynchrony with the aim of improved risk stratification. However, these efforts have not been fruitful to date. This article discusses mechanisms of cardiac dyssynchrony, reviews clinical data supporting resynchronization therapy, and addresses the lack of convincing evidence to support the use of noninvasive imaging measures of dyssynchrony in improving patient management...
August 8, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28782443/cerebral-a%C3%AE-40-and-systemic-hypertension
#16
Hannah M Tayler, Jennifer C Palmer, Taya L Thomas, Patrick G Kehoe, Julian Fr Paton, Seth Love
Mid-life hypertension and cerebral hypoperfusion may be preclinical abnormalities in people who later develop Alzheimer's disease. Although accumulation of amyloid-beta (Aβ) is characteristic of Alzheimer's disease and is associated with upregulation of the vasoconstrictor peptide endothelin-1 within the brain, it is unclear how this affects systemic arterial pressure. We have investigated whether infusion of Aβ40 into ventricular cerebrospinal fluid modulates blood pressure in the Dahl salt-sensitive rat...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28780839/-feasibility-and-value-of-index-of-microcirculatory-resistance-in-patients-with-acute-myocardial-infarction-after-primary-percutaneous-coronary-intervention
#17
J L Han, L Y He, M Cui, Y Z Zhang, X B Liu, X Y Xu, Y P Wang, F F Wang, G S Wang, J Niu, F C Zhang, L Mi, L J Guo, W Gao
Objective: To evaluate the feasibility of detecting index of microcirculatory resistance (IMR) and the relationship between IMR and left ventricular (LV) systolic function after acute myocardial infarction (AMI) undergoing primary percutaneous coronary intervention (PCI). Methods: The patients with first AMI received primary PCI in Peking University Third Hospital were enrolled from January 2014 to March 2016. IMR were measured immediately after PCI by using pressure/temperature wire. The relationship between IMR and left ventricular ejection fraction (LVEF) assessed by echocardiography at first day and 6 months after admission was evaluated...
August 1, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28780600/the-anti-influenza-drug-oseltamivir-reduces-atrial-fibrillation-in-an-experimental-whole-heart-model
#18
Gerrit Frommeyer, André Mittelstedt, Julian Wolfes, Christian Ellermann, Simon Kochhäuser, Patrick Leitz, Dirk G Dechering, Lars Eckardt
Recent experimental studies suggested direct effects of the anti-influenza drug oseltamivir on cardiac electrophysiology. We therefore aimed at analyzing potential antiarrhythmic effects of oseltamivir on atrial fibrillation (AF) in an experimental whole-heart model. Twelve rabbit hearts were isolated and Langendorff perfused. Thereafter, hearts were paced at cycle lengths of 350, 250, and 200 ms in the atrium. A standardized protocol employing atrial burst pacing induced AF in 4 of 12 hearts under baseline conditions (33%, 11 episodes)...
August 6, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28780148/intra-abdominal-hypertension-abdominal-compartment-syndrome-and-the-open-abdomen
#19
REVIEW
William Kirke Rogers, Luis Garcia
Abdominal Compartment Syndrome (ACS) is the endpoint of a process whereby massive interstitial swelling in the abdomen or rapid development of a space-filling lesion within the abdomen (such as ascites or a hematoma) leads to a pathologically increased pressure. This results in so-called Intra-Abdominal Hypertension (IAH), causing decreased perfusion of the kidneys and abdominal viscera and possible difficulties with ventilation and maintenance of cardiac output. These effects contribute to a cascade of ischemia and multiple organ dysfunction with high mortality...
August 2, 2017: Chest
https://www.readbyqxmd.com/read/28777701/a-pet-mr-imaging-approach-for-the-integrated-assessment-of-chemotherapy-induced-brain-heart-and-bone-injuries-in-pediatric-cancer-survivors-a-pilot-study
#20
Ashok J Theruvath, Anat Ilivitzki, Anne Muehe, Johanna Theruvath, Praveen Gulaka, Christine Kim, Sandra Luna-Fineman, Kathleen M Sakamoto, Kristen W Yeom, Phillip Yang, Michael Moseley, Frandics Chan, Heike E Daldrup-Link
Purpose To develop a positron emission tomography (PET)/magnetic resonance (MR) imaging protocol for evaluation of the brain, heart, and joints of pediatric cancer survivors for chemotherapy-induced injuries in one session. Materials and Methods Three teams of experts in neuroimaging, cardiac imaging, and bone imaging were tasked to develop a 20-30-minute PET/MR imaging protocol for detection of chemotherapy-induced tissue injuries of the brain, heart, and bone. In an institutional review board-approved, HIPAA-compliant, prospective study from April to July 2016, 10 pediatric cancer survivors who completed chemotherapy underwent imaging of the brain, heart, and bone with a 3-T PET/MR imager...
August 4, 2017: Radiology
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