keyword
MENU ▼
Read by QxMD icon Read
search

Myocardial stun

keyword
https://www.readbyqxmd.com/read/29360287/percutaneous-perfusion-monitoring-for-the-detection-of-hemodialysis-induced-cardiovascular-injury
#1
Jarrin D Penny, Claire Grant, Fabio Salerno, Anne Brumfield, Marcus Mianulli, Lori Poole, Christopher W Mcintyre
INTRODUCTION: The safe delivery of hemodialysis (HD) faces dual challenges; the accurate detection of systemic circulatory stress producing cardiovascular (CV) injury, and the ability to enable effective preemptive intervention for such injury. We performed a pilot study to examine the capability of a new noninvasive, real-time monitoring system to detect the deleterious effects of HD on CV stability. METHODS: Eight patients were evaluated with echocardiography prior to the initiation of HD and again at peak HD stress...
January 23, 2018: Hemodialysis International
https://www.readbyqxmd.com/read/29354941/-new-thoughts-in-mechanism-research-of-acupuncture-for-myocardial-stunning-from-%C3%AE%C2%BA-opioid-receptor-signaling-pathway
#2
Yuanyuan Wang, Qun Liu, Fengyan Lu, Juanjuan Xin, Qiufu Dai, Shuyang Wu, Yuxue Zhao, Junhong Gao, Xiaochun Yu
By reviewing the literature regarding the development mechanism of myocardial stunning, effects of acupuncture on myocardial ischemic injury, and correlation between acupuncture and κ-opioid receptor, it was suggested that acupuncture was highly likely to act on κ-opioid receptor in myocardial cells, and directly treated myocardial malfunction induced by myocardial stunning through κ-opioid receptor and its signaling pathway. In addition, acupuncture could inhabit the signaling pathway of adrenoceptor β1, one of the main functional receptors, to indirectly improve myocardial ischemic injury...
January 12, 2018: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29239459/ischemic-left-ventricle-systolic-dysfunction-an-evidence-based-approach-in-diagnostic-tools-and-therapeutics
#3
Eduardo Gomes Lima, Felipe Pereira Câmara de Carvalho, Jaime Paula Pessoa Linhares Filho, Fabio Grunspun Pitta, Carlos Vicente Serrano
Coronary artery disease (CAD) associated with left ventricular systolic dysfunction is a condition related to poor prognosis. There is a lack of robust evidence in many aspects related to this condition, from definition to treatment. Ischemic cardiomyopathy is a spectrum ranging from stunned myocardium associated with myocardial fibrosis to hibernating myocardium and repetitive episodes of ischemia. In clinical practice, relevance lies in identifying the myocardium that has the ability to recover its contractile reserve after revascularization...
September 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/29221768/current-interpretation-of-myocardial-stunning
#4
REVIEW
Andrea Igoren Guaricci, Gabriella Bulzis, Gianluca Pontone, Pietro Scicchitano, Rossella Carbonara, Mark Rabbat, Delia De Santis, Marco Matteo Ciccone
Myocardial stunning is a temporary post-ischemic cardiac mechanical dysfunction. As such, it is a heterogeneous entity and different conditions can promote its occurrence. Transient coronary occlusion, increased production of catecholamines and endothelin, and myocardial inflammation are all possible causes of myocardial stunning. Possible underlying mechanisms include an oxyradical hypothesis, calcium overload, decreased responsiveness of myofilaments to calcium, and excitation-contraction uncoupling due to sarcoplasmic reticulum dysfunction...
November 27, 2017: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29221767/editorial-commentary-interpreting-and-dealing-with-myocardial-stunning
#5
EDITORIAL
Dawod Sharif
No abstract text is available yet for this article.
November 28, 2017: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29196789/prediction-of-functional-recovery-after-primary-pci-using-the-estimate-of-myocardial-salvage-in-gated-spect-early-after-acute-myocardial-infarction
#6
Raffaella Calabretta, Angelo Castello, Flavia Linguanti, Francesca Tutino, Alfonso Ciaccio, Cristina Giglioli, Roberto Sciagrà
PURPOSE: Primary percutaneous coronary intervention (PCI) in acute myocardial infarction (AMI) aims to achieve myocardial salvage (MS). Because the reference method for measuring MS requires myocardial perfusion imaging (MPI) after tracer injection before PCI, alternative approaches have been proposed, but none has gained wide acceptance. Gated SPECT MPI can assess infarct size (IS), but can also show myocardial stunning. Thus, we compared functional and perfusion abnormalities early after AMI to estimate MS, and to predict left ventricular ejection fraction (LVEF) recovery at follow-up...
December 1, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29169759/abnormal-coronary-vasoreactivity-in-transient-left-ventricular-apical-ballooning-tako-tsubo-syndrome
#7
Edoardo Verna, Stefano Provasoli, Sergio Ghiringhelli, Fabrizio Morandi, Jorge Salerno-Uriarte
BACKGROUND: The exact etiology and pathophysiologic mechanisms of tako-tsubo syndrome (TTS) remain controversial. OBJECTIVE: To further evaluate the abnormal coronary vasoreactivity and its possible anatomical substrate in TTS. METHODS: We studied 47 patients (46 women; age 67±12years) who underwent diagnostic cardiac catheterization and evaluation of coronary vasoreactivity by sequential acetylcholine (Ach), nitroglycerine and adenosine testing with angiographic and intracoronary pressure-Doppler flow monitoring...
January 1, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29154687/pyruvate-enhancement-of-cardiac-performance-cellular-mechanisms-and-clinical-application
#8
Robert T Mallet, Albert H Olivencia-Yurvati, Rolf Bünger
Cardiac contractile function is adenosine-5'-triphosphate (ATP)-intensive, and the myocardium's high demand for oxygen and energy substrates leaves it acutely vulnerable to interruptions in its blood supply. The myriad cardioprotective properties of the natural intermediary metabolite pyruvate make it a potentially powerful intervention against the complex injury cascade ignited by myocardial ischemia-reperfusion. A readily oxidized metabolic substrate, pyruvate augments myocardial free energy of ATP hydrolysis to a greater extent than the physiological fuels glucose, lactate and fatty acids, particularly when it is provided at supra-physiological plasma concentrations...
January 2018: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29139036/myocardial-stunning-by-gated-spect-an-old-tool-reinvented-in-a-stunning-turn
#9
EDITORIAL
Wael A AlJaroudi, Fadi G Hage
No abstract text is available yet for this article.
November 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29119373/additional-value-of-systolic-wall-thickening-in-myocardial-stunning-evaluated-by-stress-rest-gated-perfusion-spect
#10
Alberto Bestetti, Besart Cuko, Adriano Decarli, Alessio Galli, Federico Lombardi
AIM AND PATIENTS: The aim of the present study is to evaluate the additional value of systolic wall thickening to myocardial perfusion in diagnosing myocardial stunning in patients with angiography proven coronary artery disease. We selected 91 ischemic patients (82 males; mean age 59.7 ± 10.3) with CAD documented by angiography. Ischemia was defined as a summed difference score ≥5. All patients underwent a 2-day gated perfusion SPECT protocol. The patients received a dose of 740 MBq of 99mTc-tetrofosmin after stress and at rest...
November 8, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29027587/correlation-between-endothelial-dysfunction-and-myocardial-damage-in-acute-phase-of-tako-tsubo-cardiomyopathy-brachial-flow-mediated-dilation-as-a-potential-marker-for-assessment-of-patient-with-tako-tsubo
#11
Rosa Carbonara, Francesco Giardinelli, Martino Pepe, Giovanni Luzzi, Immacolata Panettieri, Vito Vulpis, Alessandro Santo Bortone, Marco Matteo Ciccone
Takotsubo cardiomyopathy (TTC) is characterized by transient systolic ventricular dysfunction. It is supposed to be caused by a cathecolaminergic wave which leads to myocardial stunning through a massive action on beta2-adrenoreceptor. Moreover, beta2-receptor hyperactivity negatively influences endothelial function. It can be detected by brachial flow mediated dilation (b-FMD) which assesses endothelium regulated vasomotility. The study aim is to analyze the b-FMD variability during hospitalization in 50 patients admitted with TTC...
October 13, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29018519/limitations-and-challenges-in-mapping-ventricular-tachycardia-new-technologies-and-future-directions
#12
Adam J Graham, Michele Orini, Pier D Lambiase
Recurrent episodes of ventricular tachycardia in patients with structural heart disease are associated with increased mortality and morbidity, despite the life-saving benefits of implantable cardiac defibrillators. Reducing implantable cardiac defibrillator therapies is important, as recurrent shocks can cause increased myocardial damage and stunning, despite the conversion of ventricular tachycardia/ventricular fibrillation. Catheter ablation has emerged as a potential therapeutic option either for primary or secondary prevention of these arrhythmias, particularly in post-myocardial infarction cases where the substrate is well defined...
August 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/28991641/cardioprotection-of-stevioside-on-stunned-rat-hearts-a-mechano-energetical-study
#13
María I Ragone, Patricia Bonazzola, Germán A Colareda, María Lara Lazarte, Fiorella Bruno, Alicia E Consolini
BACKGROUND: The sweetener and hypoglycemic properties of stevioside (STV) are well known, as the main component of the plant Stevia rebaudiana. Given its extensive use in diabetic patients, it was of interest to evaluate its effects on the most frequent cardiovascular disease, the coronary insufficiency. PURPOSE: To study whether STV could be cardioprotective against ischemia-reperfusion (I/R) in a model of "stunning" in rat hearts. STUDY DESIGN: A preclinical study was performed in isolated hearts from rats in the following groups: non-treated rats whose hearts were perfused with STV 0...
November 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28979949/brief-myocardial-ischemia-produces-cardiac-troponin-i-release-and-focal-myocyte-apoptosis-in-the-absence-of-pathological-infarction-in-swine
#14
Brian R Weil, Rebeccah F Young, Xiaomeng Shen, Gen Suzuki, Jun Qu, Saurabh Malhotra, John M Canty
In a porcine model of brief ischemia leading to reversible stunning in the absence of tissue necrosis, we demonstrated delayed release of cTnI that exceeded the 99(th) percentile for normals 60-minutes after reperfusion and rose to readily detectable levels 24-hours later. While tissue analysis at 60-minutes showed no evidence of infarction, TUNEL staining demonstrated isolated myocytes undergoing apoptosis, which was absent after 24-hours. These results demonstrate that cTnI elevations occur after ischemia of a duration that is insufficient to produce myocyte necrosis and reflect myocyte injury associated with delayed apoptosis in the absence of pathological evidence of infarction...
April 2017: JACC. Basic to Translational Science
https://www.readbyqxmd.com/read/28946769/magnolol-reduces-renal-ischemia-and-reperfusion-injury-via-inhibition-of-apoptosis
#15
Chia-Yu Tang, Chang-Chi Lai, Po-Hsun Huang, An-Han Yang, Shu-Chiung Chiang, Po-Chao Huang, Kuo-Wei Tseng, Cheng-Hsiung Huang
Magnolol, a constituent of the bark of Magnolia officinalis, has been reported to decrease myocardial stunning and infarct size. In this study, we investigated whether magnolol can reduce renal ischemia and reperfusion (I/R) injury. Renal I/R, induced by a 60-min occlusion of bilateral renal arteries and a 24-h reperfusion, significantly increased blood urea nitrogen (BUN) and creatinine levels, and caused histological damage to the kidneys of rats. Apoptosis, as evaluated by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) staining and caspase-3 activation, was significantly increased in the kidneys...
2017: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/28928991/stress-cardiomyopathy-managed-with-extracorporeal-support-after-self-injection-of-epinephrine
#16
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/28875040/a-review-of-neurogenic-stunned-myocardium
#17
REVIEW
Sylvia Biso, Supakanya Wongrakpanich, Akanksha Agrawal, Sujani Yadlapati, Marina Kishlyansky, Vincent Figueredo
Neurologic stunned myocardium (NSM) is a phenomenon where neurologic events give rise to cardiac abnormalities. Neurologic events like stroke and seizures cause sympathetic storm and autonomic dysregulation that result in myocardial injury. The clinical presentation can involve troponin elevation, left ventricular dysfunction, and ECG changes. These findings are similar to Takotsubo cardiomyopathy and acute coronary syndrome. It is difficult to distinguish NSM from acute coronary syndrome based on clinical presentation alone...
2017: Cardiovascular Psychiatry and Neurology
https://www.readbyqxmd.com/read/28844991/recalibrating-reperfusion-waypoints
#18
EDITORIAL
Paul W Armstrong, Robert C Welsh
No abstract text is available yet for this article.
October 17, 2017: Circulation
https://www.readbyqxmd.com/read/28716974/heart-failure-in-patients-with-kidney-disease
#19
REVIEW
Courtney Tuegel, Nisha Bansal
Heart failure (HF) is a leading cause of morbidity and mortality in patients with chronic kidney disease (CKD), and the population of CKD patients with concurrent HF continues to grow. The accurate diagnosis of HF is challenging in patients with CKD in part due to a lack of validated imaging and biomarkers specifically in this population. The pathophysiology between the heart and the kidneys is complex and bidirectional. Patients with CKD have greater prevalence of traditional HF risk factors as well as unique kidney-specific risk factors including malnutrition, acid-base alterations, uraemic toxins, bone mineral changes, anemia and myocardial stunning...
December 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28661565/a-brief-review-of-intradialytic-hypotension-with-a-focus-on-survival
#20
Jason A Chou, Kamyar Kalantar-Zadeh, Anna T Mathew
Intradialytic hypotension (IDH), a common complication of ultrafiltration during hemodialysis therapy, is associated with high mortality and morbidity. IDH, defined as a nadir systolic blood pressure of less than 90 mm Hg on more than 30% of treatments, is a relevant definition and is correlated with mortality. Risk factors for IDH include patient demographics, anti-hypertensive medication use, larger interdialytic weight gain, and dialysis prescription features as dialysate sodium, high ultrafiltration rate, and dialysate temperature...
November 2017: Seminars in Dialysis
keyword
keyword
21774
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"