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https://www.readbyqxmd.com/read/29339700/assessment-of-the-relationship-between-reperfusion-success-and-t-peak-to-t-end-interval-in-patients-with-st-elevation-myocardial-infarction-treated-with-percutaneous-coronary-intervention
#1
Metin Çağdaş, Süleyman Karakoyun, İbrahim Rencüzoğulları, Yavuz Karabağ, Mahmut Yesin, Yalçın Velibey, İnanç Artaç, Doğan İliş, Süleyman Çağan Efe, Onur Taşar, Halil İbrahim Tanboğa
OBJECTIVE: T-peak-T-end (TPE) interval, which represents the dispersion of repolarization, is defined as the interval between the peak and end of the T-wave, and is associated with increased malignant ventricular arrhythmia and sudden cardiac death (SCD) in patients with ST elevation myocardial infarction (STEMI). Although prolonged TPE interval is associated with poor short- and long-term outcomes, even in patients with STEMI treated with successful primary percutaneous coronary intervention (pPCI), clinical, angiographic, and laboratory parameters that affect TPE remain to be elucidated...
January 2018: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/29332028/possible-erythrocyte-contributions-to-and-exacerbation-of-the-post-thrombolytic-no-reflow-phenomenon
#2
Shang-Jen Yu, James P Buerck, Edgar A O'Rear, Thomas L Whitsett
BACKGROUND: Reperfusion injury often occurs with therapeutic intervention addressing the arterial occlusions causing acute myocardial infarction and stroke. The no-reflow phenomenon has been ascribed to leukocyte plugging and blood vessel constriction in the microcirculation. OBJECTIVE: To assess possible red cell contributions to post thrombolytic no-reflow phenomenon. METHODS: Blood clots were formed by recalcifying 1 ml of citrated fresh human venous blood and then lysed by adding 1,000 units of streptokinase (SK) at several intervals within 1 hour...
January 11, 2018: Biorheology
https://www.readbyqxmd.com/read/29329185/vasodilation-during-normothermic-machine-perfusion-preventing-the-no-reflow-phenomena
#3
Ahmed Nassar, Cristiano Quintini
No abstract text is available yet for this article.
January 11, 2018: Transplantation
https://www.readbyqxmd.com/read/29320987/effect-of-intracoronary-agents-on-the-no-reflow-phenomenon-during-primary-percutaneous-coronary-intervention-in-patients-with-st-elevation-myocardial-infarction-a-network-meta-analysis
#4
Xiaowei Niu, Jingjing Zhang, Ming Bai, Yu Peng, Shaobo Sun, Zheng Zhang
BACKGROUND: Despite the restoration of epicardial flow after primary percutaneous coronary intervention (PPCI), myocardial reperfusion remains impaired in a significant proportion of patients. We performed a network meta-analysis to assess the effect of 7 intracoronary agents (adenosine, anisodamine, diltiazem, nicorandil, nitroprusside, urapidil, and verapamil) on the no-reflow phenomenon in patients with ST-elevation myocardial infarction (STEMI) undergoing PPCI. METHODS: Database searches were conducted to identify randomized controlled trials (RCTs) comparing the 7 agents with each other or with standard PPCI...
January 10, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29298651/is-atherothromboaspiration-a-possible-solution-for-the-prevention-of-no-reflow-phenomenon-in-acute-coronary-syndromes-single-centre-experience-and-review-of-the-literature
#5
Antonis S Manolis
BACKGROUND: Intracoronary thrombus in acute myocardial infarction (MI) confers higher rates of no-reflow with attendant adverse consequences. Earlier randomized-controlled-trials (RCTs) of routine thromboaspiration during percutaneous coronary intervention (PCI) indicated a clinical benefit, but more recent RCTs were negative. However, data of selective use of this adjunctive approach remain scarce. OBJECTIVE: The aim of this single-centre prospective study was to report the results of selective thromboaspiration during PCI in patients with intracoronary thrombi, and also to provide an extensive literature review on current status of thromboaspiration...
January 1, 2018: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/29280545/perforated-balloon-technique-a-simple-and-handy-technique-to-combat-no-reflow-phenomenon-in-coronary-system
#6
Tejas Patel, Sanjay Shah, Rajiv Gulati, Tak Kwan, Mauricio G Cohen, Samir Pancholy
OBJECTIVE: Examining the efficacy and outcomes of intracoronary (IC) instillation of adenosine using a novel perforated balloon technique (PBT) to combat no-reflow phenomenon during percutaneous coronary intervention (PCI) for acute coronary syndrome (ACS). BACKGROUND: Occurrence of no-reflow during PCI is a serious adverse prognostic event and inability to re-establish better flow is associated with poor outcomes. Several pharmacological and non-pharmacological interventions have been used to treat this situation...
December 27, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29276911/-comparison-of-direct-stenting-versus-stending-after-pre-dilation-in-st-elevation-myocardial-infarction
#7
V A Kuznetsov, I S Bessonov, I P Zyrianov, T I Zyrianova, S S Sapozhnikov, Y V Potolinskaya
AIM: To study was to assess in-hospital outcomes of direct coronary stenting (DS) compared with stenting after predilation (PD) in patients with ST-elevation myocardial infarction (STEMI). MATERIAL AND METHODS: Data were collected from all patients (n=1103) with STEMI subjected to primary PCI in Tyumen cardiology center from 2006 to 2014. The clinical and angiographic characteristics, in-hospital outcomes, as well as predictors of no-reflow phenomenon were analyzed...
November 2017: Kardiologiia
https://www.readbyqxmd.com/read/29246934/left-ventricular-pseudoaneurysm-formation-in-a-patient-presenting-with-a-subacute-myocardial-infarction
#8
Crochan John O'Sullivan, Daniela Groza, Franz R Eberli
Left ventricular pseudoaneurysm is a rare mechanical complication of acute myocardial infarction. In the present case, an 80-year-old man presenting with a subacute non-ST segment elevation myocardial infarction was found to have an occluded second obtuse marginal branch of the left circumflex coronary artery. Following the implantation of two drug-eluting stents, the patient developed no-reflow phenomenon. Coronary angiography 6 weeks later revealed persistence of the no-reflow phenomenon. During the left ventriculogram, a massive pseudoaneurysm was diagnosed and the patient successfully underwent emergency surgery...
December 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29245906/effects-of-nicorandil-on-pi3k-akt-signaling-pathway-and-its-anti-apoptotic-mechanisms-in-coronary-microembolization-in-rats
#9
Qiang Su, Lang Li, Jinmin Zhao, Yuhan Sun, Huafeng Yang
Coronary microembolization (CME) is a common complication of percutaneous coronary intervention (PCI) for acute coronary syndrome. It leads to myocardial apoptosis and cardiac dysfunction. Nicorandil pretreatment can prevent PCI-related myocardial injury and reduce the incidence of no- or slow-reflow phenomena. This cardioprotective effect is probably attributable to the suppression of CME-induced cardiomyocyte apoptosis, but the specific mechanisms have not been clarified. We aimed to investigate the protective effects of nicorandil pretreatment on CME-induced myocardial injury and clarify the underlying mechanisms...
November 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/29243788/evaluation-on-the-impact-of-spontaneous-reperfusion-on-cardiac-muscle-of-acute-myocardial-infarction-by-three-dimensional-speckle-tracking-imaging
#10
Z-W Tao, X-W Ma, N-N Liu, N-L Tian, X-F Gao, P-X Xiao
OBJECTIVE: To explore the effect of spontaneous reperfusion (SR) on three-dimensional myocardial strain in patients with acute anterior myocardial infarction by three-dimensional speckle tracking imaging (3D-STI) technology. PATIENTS AND METHODS: Patients diagnosed with acute anterior myocardial infarction during 2013 to 2016 were consecutively selected and divided into SR group and non-spontaneous reperfusion (Non-SR) group based on whether there was SR. Patients in both groups received direct percutaneous coronary intervention (PCI) in time window...
December 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29238500/effects-of-dexmedetomidine-on-heart-arrhythmia-prevention-in-off-pump-coronary-artery-bypass-surgery-a-randomized-clinical-trial
#11
Ghasem Soltani, Saeed Jahanbakhsh, Mohammad Abbasi Tashnizi, Mehdi Fathi, Shahram Amini, Nahid Zirak, Shima Sheybani
Background: Arrhythmia occurring during and after surgery is one of the major complications in open-heart surgery. Dexmedetomidine is an intravenous alpha-2 agonist and very specific short-acting drug to protect the various organs against ischemic injuries and blood reflow. However, the effect of dexmedetomidine for preventing intraoperative heart arrhythmias has not been recognized. Objective: This study aimed to determine the effect of dexmedetomidine on the incidence rate of heart arrhythmias and anesthetic required in off-pump coronary artery bypass surgery...
October 2017: Electronic Physician
https://www.readbyqxmd.com/read/29237156/potential-involvement-of-mir-30e-3p-in-myocardial-injury-induced-by-coronary-microembolization-via-autophagy-activation
#12
Xian-Tao Wang, Xiao-Dan Wu, Yuan-Xi Lu, Yu-Han Sun, Han-Hua Zhu, Jia-Bao Liang, Wen-Kai He, Zhi-Yu Zeng, Lang Li
BACKGROUND/AIMS: Coronary microembolization (CME) can lead to no-reflow or slow reflow, which is one of the important reasons for loss of clinical benefit from myocardial reperfusion therapy. MicroRNAs and autophagy are heavily implicated in the occurrence and development of almost all cardiovascular diseases. Therefore, the present study was designed to investigate the role of miR-30e-3p and autophagy in CME-induced myocardial injury rat model. METHODS: Sixty rats were randomly divided into six groups: sham, CME 1h,3h,6h,9h, and 12h (n = 10 per group)...
December 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29193382/prediction-of-no-reflow-and-major-adverse-cardiovascular-events-with-a-new-scoring-system-in-stemi-patients
#13
Adil Bayramoğlu, Hakan Taşolar, Ahmet Kaya, İbrahim Halil Tanboğa, Mehmet Yaman, Osman Bektaş, Zeki Yüksel Günaydın, Vecih Oduncu
BACKGROUND: No-reflow is associated with a poor prognosis in STEMI patients. There are many factors and mechanisms that contribute to the development of no-reflow, including age, reperfusion time, a high thrombus burden, Killip class, long stent use, ejection fraction ≤40, and a high Syntax score. In this study, we aimed to evaluate the parameters associated with no-reflow prediction by creating a new scoring system. METHODS: The study included 515 consecutive STEMI patients who underwent PCI; 632 STEMI patients who had undergone PCI in another center were included in the external validation of the scoring system...
November 28, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/29192562/cerebral-microcirculatory-alterations-and-the-no-reflow-phenomenon-in%C3%A2-vivo-after-experimental-pediatric-cardiac-arrest
#14
Lingjue Li, Samuel M Poloyac, Simon C Waltkins, Claudette M St Croix, Henry Alexander, Gregory A Gibson, Patricia A Loughran, Levent Kirisci, Robert Sb Clark, Patrick M Kochanek, Alberto L Vazquez, Mioara D Manole
Decreased cerebral blood flow (CBF) after cardiac arrest (CA) contributes to secondary ischemic injury in infants and children. We previously reported cortical hypoperfusion with tissue hypoxia early in a pediatric rat model of asphyxial CA. In order to identify specific alterations as potential therapeutic targets to improve cortical hypoperfusion post-CA, we characterize the CBF alterations at the cortical microvascular level in vivo using multiphoton microscopy. We hypothesize that microvascular constriction and disturbances of capillary red blood cell (RBC) flow contribute to cortical hypoperfusion post-CA...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29174098/which-admission-electrocardiographic-parameter-is-more-powerful-predictor-of-no-reflow-in-patients-with-acute-anterior-myocardial-infarction-who-underwent-primary-percutaneous-intervention
#15
Mert İlker Hayıroğlu, Ahmet Okan Uzun, Muhammed Keskin, Edibe Betül Börklü, Ceyhan Türkkan, Ahmet İlker Tekkeşin, Ömer Kozan
BACKGROUND: Acute transmural ischemia due to left anterior descending artery (LAD) occlusion changes precordial R and Q wave durations owing to depressed intramyocardial activation. We investigated the prognostic value of sum of precordial Q wave duration/sum of precordial R wave duration ratio (Q/R) in patients with first acute anterior myocardial infarction (AAMI) treated with primary percutaneous coronary intervention (PPCI). METHODS: In this prospective analysis, we evaluated the no-reflow predictive value of Q/R on 403 patients with first AAMI...
October 18, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29120327/capillary-pericytes-mediate-coronary-no-reflow-after-myocardial-ischaemia
#16
Fergus M O'Farrell, Svetlana Mastitskaya, Matthew Hammond-Haley, Felipe Freitas, Wen Rui Wah, David Attwell
After cardiac ischaemia, a prolonged decrease of coronary microvascular perfusion often occurs even after flow is restored in an upstream artery. This 'no-reflow' phenomenon worsens patient prognosis. In the brain, after stroke, a similar post-ischaemic 'no-reflow' has been attributed to capillary constriction by contractile pericytes. We now show that occlusion of a rat coronary artery, followed by reperfusion, blocks 40% of cardiac capillaries and halves perfused blood volume within the affected region. Capillary blockages colocalised strongly with pericytes, where capillary diameter was reduced by 37%...
November 9, 2017: ELife
https://www.readbyqxmd.com/read/29115615/effects-of-dabigatran-regulates-no%C3%A2-reflow-phenomenon-in-acute-myocardial-infarction-mice-through-anti%C3%A2-inflammatory-and-anti%C3%A2-oxidative-activities-and-connective-tissue-growth-factor-expression
#17
Kunqing Song, Yanshan Wang, Jizhang Sheng, Chunmei Ma, Hongmei Li
Pradaxa is a novel oral anticoagulant, which was originally used to prevent thrombosis following joint replacement surgery. The aim of the current study was to investigate the effect dabigatran on acute myocardial infarction through regulating no‑reflow phenomenon and oxidative stress, neutrophil intraplaque infiltration and apoptosis. In the present study, dabigatran significantly inhibited the infarct size, increased arterial pressure and reduced no‑reflow phenomenon in acute myocardial infarction (AMI) vehicle rabbits...
October 25, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29104752/combined-analysis-of-the-safety-of-intra-coronary-drug-delivery-during-primary-percutaneous-coronary-intervention-for-acute-myocardial-infarction-a-study-of-three-clinical-trials
#18
Krishnaraj S Rathod, Stephen Hamshere, Rayomand S Khambata, Mervyn Andiapen, Mark Westwood, Anthony Mathur, Amrita Ahluwalia, Daniel A Jones
Background: The local injection of novel cardioprotective study drugs prior to percutaneous coronary intervention could cause embolisation of thrombus, resulting in increased reperfusion injury and subsequent infarct size. The aim of this study was to assess the safety of the delivery of an intracoronary therapy delivered during primary percutaneous coronary intervention for acute myocardial infarction prior to the re-establishment of thrombolysis in myocardial infarction III flow. Methods: One hundred sixty-seven patients with acute myocardial infarction successfully reperfused through primary percutaneous coronary intervention and undergoing Cardiac MRI within the first week after reperfusion were studied...
January 2017: JRSM Cardiovascular Disease
https://www.readbyqxmd.com/read/29102280/reperfusion-therapy-what-s-with-the-obstructed-leaky-and-broken-capillaries
#19
REVIEW
D Neil Granger, Peter R Kvietys
Microvascular dysfunction is well established as an early and rate-determining factor in the injury response of tissues to ischemia and reperfusion (I/R). Severe endothelial cell dysfunction, which can develop without obvious morphological cell injury, is a major underlying cause of the microvascular abnormalities that accompany I/R. While I/R-induced microvascular dysfunction is manifested in different ways, two responses that have received much attention in both the experimental and clinical setting are impaired capillary perfusion (no-reflow) and endothelial barrier failure with a transition to hemorrhage...
September 21, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/29081176/-impact-of-platelet-distribution-width-on-the-extent-and-long-term-outcome-of-patients-with-stable-coronary-artery-disease-post-percutaneous-coronary-intervention
#20
P Jiang, Y Song, J J Xu, Y L Ma, X F Tang, Y Yao, L Jiang, H H Wang, X Zhang, X L Diao, Y J Yang, R L Gao, S B Qiao, B Xu, J Q Yuan
Objective: To evaluate the relationship between platelet distribution width(PDW) and the extent of coronary artery disease and 2-year outcome in patients received percutaneous coronary artery intervention(PCI) because of stable coronary artery disease(SCAD). Methods: We consecutively enrolled 4 293 patients who received PCI because of SCAD in Fuwai Hospital from Jan 2013 to Dec 2013, patients were followed up for 2 years. Patients were divided into three groups according to tertiles values of PDW as follows: PDW≤11...
October 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
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