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https://www.readbyqxmd.com/read/28335261/nanomaterials-for-cardiac-myocyte-tissue-engineering
#1
REVIEW
Rodolfo Amezcua, Ajay Shirolkar, Carolyn Fraze, David A Stout
Since their synthesizing introduction to the research community, nanomaterials have infiltrated almost every corner of science and engineering. Over the last decade, one such field has begun to look at using nanomaterials for beneficial applications in tissue engineering, specifically, cardiac tissue engineering. During a myocardial infarction, part of the cardiac muscle, or myocardium, is deprived of blood. Therefore, the lack of oxygen destroys cardiomyocytes, leaving dead tissue and possibly resulting in the development of arrhythmia, ventricular remodeling, and eventual heart failure...
July 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334029/prognostic-power-of-global-2d-strain-according-to-left-ventricular-ejection-fraction-in-patients-with-st-elevation-myocardial-infarction
#2
Myung-Jin Cha, Hyun-Sook Kim, Seong Hwan Kim, Jae-Hyeong Park, Goo-Yeong Cho
BACKGROUNDS: We aimed to evaluate the predictive power of longitudinal and circumferential fibers according to left ventricular ejection fraction (LVEF) in successfully reperfused acute ST elevation myocardial infarction (STEMI) patients. METHODS: Total 691 patients (age 59±13, 20% female) underwent clinical evaluation and conventional and strain echocardiography (Global longitudinal strain (GLS), global circumferential strain (GCS)). The clinical outcome was defined as the composite of death, hospitalization for heart failure, non-fatal myocardial infarction, and ventricular arrhythmia...
2017: PloS One
https://www.readbyqxmd.com/read/28333373/ventricular-arrhythmias-in-patients-with-newly-diagnosed-nonischemic-cardiomyopathy-insights-from-the-prolong-study
#3
David Duncker, Thorben König, Stephan Hohmann, Johann Bauersachs, Christian Veltmann
BACKGROUND: Patients with nonischemic cardiomyopathy (NICM) reportedly have low incidence of appropriate shocks from wearable cardioverter-defibrillators (WCDs). A recent study questions the benefit from primary preventive implantation of implantable cardioverter-defibrillators in NICM. We therefore analyzed a subgroup of patients with NICM from the PROLONG study. HYPOTHESIS: Patients with newly diagnosed NICM show a risk for ventricular tachyarrhythmia. METHODS: The PROLONG study included 167 patients with newly diagnosed heart failure and left ventricular ejection fraction (LVEF) ≤35% with a WCD...
March 23, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28331489/reversible-atrial-fibrillation-following-crotalinae-envenomation
#4
Dan Quan, Kenneth Zurcher
BACKGROUND: Cardiotoxicity is a documented complication of Crotalinae envenomation. Reported cardiac complications following snake envenomation have included acute myocardial infarction, electrocardiogram abnormalities and arrhythmias. Few reports exist describing arrhythmia induced by viper envenomation and to our knowledge none describe arrhythmia induced by Crotalinae envenomation. This report concerns the first known case of atrial fibrillation precipitated by rattlesnake bite. CASE PRESENTATION: A 73-year-old Caucasian man with a past medical history of hypertension, hyperlipidemia, type 1 diabetes mellitus, and a baseline first-degree atrioventricular block presented to the emergency department following a rattlesnake bite to his left lower leg...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28329361/sex-hormones-affect-outcome-in-arrhythmogenic-right-ventricular-cardiomyopathy-dysplasia-from-a-stem-cell-derived-cardiomyocyte-based-model-to-clinical-biomarkers-of-disease-outcome
#5
Deniz Akdis, Ardan M Saguner, Khooshbu Shah, Chuanyu Wei, Argelia Medeiros-Domingo, Arnold von Eckardstein, Thomas F Lüscher, Corinna Brunckhorst, H S Vincent Chen, Firat Duru
Aims: Arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) is characterized by fibrofatty infiltration of the myocardium and ventricular arrhythmias that may lead to sudden cardiac death. It has been observed that male patients develop the disease earlier and present with more severe phenotypes as compared to females. Thus, we hypothesized that serum levels of sex hormones may contribute to major arrhythmic cardiovascular events (MACE) in patients with ARVC/D. Methods and results: The serum levels of five sex hormones, sex hormone-binding globulin, high sensitivity troponin T, pro-brain natriuretic peptide, cholesterol, triglycerides, insulin, and glucose were measured in 54 ARVC/D patients (72% male)...
February 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28329110/mid-term-outcomes-of-concomitant-surgical-ablation-of-atrial-fibrillation-in-patients-undergoing-cardiac-surgery-for-hypertrophic-cardiomyopathy%C3%A2
#6
Elisabetta Lapenna, Alberto Pozzoli, Michele De Bonis, Giovanni La Canna, Teodora Nisi, Simona Nascimbene, Luca Vicentini, Stefania Di Sanzo, Benedetto Del Forno, Davide Schiavi, Ottavio Alfieri
OBJECTIVES: Atrial fibrillation (AF) is common in patients with hypertrophic cardiomyopathy (HCM) and it is often poorly tolerated because of loss of atrial contraction and reduced filling time with rapid ventricular rates. Restoring sinus rhythm is of great clinical benefit to HCM patients. Very few data exist regarding surgical ablation of concomitant AF in this setting. The aim of this study was to evaluate the mid-term outcome of surgical AF ablation in patients who underwent cardiac surgery due to HCM...
February 17, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28328585/mechanical-support-with-impella-during-malignant-arrhythmia-ablation-a-case-report-on-the-growing-trend-in-the-electrophysiology-laboratory
#7
Adam C Adler, Ramesh Kodavatiganti
Congenitally corrected transposition of the great arteries is a rare form of congenital heart disease in which the persistence of the right ventricle as the systemic ventricle leads to heart failure, tricuspid valve insufficiency, and arrhythmia. Supraventricular arrhythmias are especially common in these patients. We discuss the anesthetic management of a 33-year-old patient with congenitally corrected transposition of the great arteries who required a ventricular assist device to maintain cardiac output during ablation of supraventricular tachyarrythmia...
March 17, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28328285/intrapulmonary-artery-balloon-pulsation-improves-circulatory-function-after-acute-myocardial-infarction-in-pigs
#8
Rahma Ouardani, Nikos Magkoutis, Philippe Bonnin, Chantal Kang, Antoni W Kedra, Georgios Sideris, Michel Bonneau, Sebastian Voicu
AIM: To examine whether pulmonary artery balloon pulsation (PABP) could improve circulatory function in acute myocardial infarction (AMI) in pigs. METHODS/RESULTS: Ten downsize pigs were sedated and ventilated. AMI was induced by inserting a plug into the left anterior descending artery. A pulsation balloon was placed in the pulmonary artery in all animals. In the treatment group (TG), pulsations began when life-threatening arrhythmia or > 30% drop in mean blood pressure (MBP) or > 40% decrease in cardiac output compared to baseline occurred...
March 22, 2017: Acute Cardiac Care
https://www.readbyqxmd.com/read/28327645/a-novel-point-of-care-smartphone-based-system-for-monitoring-the-cardiac-and-respiratory-systems
#9
Kwanghyun Sohn, Faisal M Merchant, Omid Sayadi, Dheeraj Puppala, Rajiv Doddamani, Ashish Sahani, Jagmeet P Singh, E Kevin Heist, Eric M Isselbacher, Antonis A Armoundas
Cardio-respiratory monitoring is one of the most demanding areas in the rapidly growing, mobile-device, based health care delivery. We developed a 12-lead smartphone-based electrocardiogram (ECG) acquisition and monitoring system (called "cvrPhone"), and an application to assess underlying ischemia, and estimate the respiration rate (RR) and tidal volume (TV) from analysis of electrocardiographic (ECG) signals only. During in-vivo swine studies (n = 6), 12-lead ECG signals were recorded at baseline and following coronary artery occlusion...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327188/allopurinol-and-the-risk-of-ventricular-arrhythmias-in-the-elderly-a-study-using-us-medicare-data
#10
Jasvinder A Singh, John Cleveland
BACKGROUND: There are no published human studies investigating whether the use of allopurinol, the most commonly used medication for the treatment of hyperuricemia in gout, the most common type of inflammatory arthritis in adults, has any beneficial effects on ventricular electrophysiology. The objective of our study was to assess whether allopurinol use is associated with a reduction in the risk of ventricular arrhythmias (VA). METHODS: We used the 5% random sample of Medicare beneficiaries from 2006-2012 to examine new allopurinol use and the risk of incident VA...
March 22, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28327076/myocardial-protection-during-minimally-invasive-cardiac-surgery-through-right-mini-thoracotomy
#11
Micaela De Palo, Pietro Guida, Florinda Mastro, Daniela Nanna, Teresa A P Quagliara, Ruggiero Rociola, Giosuè Lionetti, Domenico Paparella
BACKGROUND: Myocardial damage is an independent predictor of adverse outcome following cardiac surgery and myocardial protection is one of the key factors to achieve successful outcomes. Cardioplegia with Custodiol is currently the most used cardioplegia during minimally invasive cardiac surgery (MICS). Different randomized controlled trials compared blood and Custodiol cardioplegia in the context of traditional cardiac surgery. No data are available for MICS. AIM: The aim of this study was to compare the efficacy of cold blood versus Custodiol cardioplegia during MICS...
April 2017: Perfusion
https://www.readbyqxmd.com/read/28326751/assessment-of-body-surface-potential-mapping-in-diabetic-patients-with-recognized-depression
#12
(no author information available yet)
OBJECTIVES: Parameters of body surface potential mapping (BSPM) in DM II patients are significantly different comparing with healthy non-diabetic subjects. Hypothesis that these changes are more pronounced in DM II patients with depression was tested in the present study. For this purpose, analysis of the relationship between the Int-QRST (isointegral) maps distribution and the depressive symptoms intensification, as well interrelation between depressive and diabetic symptoms were performed...
January 22, 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28326201/hyperkalemia-induced-brugada-phenocopy-a-rare-ecg-manifestation
#13
Muhammad Ameen, Ghulam Akbar, Naeem Abbas, Ghazi Mirrani
Brugada syndrome (BrS) is an inherited disorder of cardiac ion channels characterized by peculiar ECG findings predisposing individuals to ventricular arrhythmias, syncope, and sudden cardiac death (SCD). Various electrolyte disturbances and ion channels blocking drugs could also provoke BrS ECG findings without genetic BrS. Clinical differentiation and recognition are essential for guiding the legitimate action. Hyperkalemia is well known to cause a wide variety of ECG manifestations. Severe hyperkalemia can even cause life threatening ventricular arrhythmias and cardiac conduction abnormalities...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28324925/non-invasive-imaging-of-ventricular-activation-during-pacing-and-arrhythmia-methods-and-validation
#14
Long Yu, Steven Pogwizd, Bin He
Cardiovascular disease continued to be a leading killer world widely. Each year, about 400,000 cases of sudden cardiac arrest are reported in the U.S. alone. Clinically, radio-frequency ablative procedure has become widely applied in the treatment of ventricular arrhythmia. Non-invasive approaches have been demonstrated to be able to provide important information on the arrhythmogenesis and potentially assist in the clinical practice. In this work, we develop and validate a novel temporal sparse based imaging method, Cardiac Electrical Sparse Imaging (CESI)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323173/outcomes-of-cardiac-resynchronization-therapy-in-patients-with-intermittent-atrial-fibrillation-or-atrial-flutter-in-the-companion-trial
#15
Matthew M Kalscheur, Leslie A Saxon, Byron K Lee, Jonathan S Steinberg, Chaoqun Mei, Kevin A Buhr, David L DeMets, Michael R Bristow, Steven N Singh
BACKGROUND: Controlled clinical trial data are lacking for cardiac resynchronization therapy (CRT) outcomes in patients with advanced heart failure (HF) from reduced left ventricular ejection fraction (HFrEF) and intermittent atrial fibrillation or flutter (AF/AFL). OBJECTIVE: To describe CRT outcomes in patients with intermittent AF/AFL and advanced HF. METHODS: HF outcomes in patients from the COMPANION trial with NYHA Class III or IV HFrEF, LVEF ≤ 0...
March 17, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28323171/acquired-long-qt-syndrome-in-hospitalized-patients
#16
Haixu Yu, Li Zhang, Jinqiu Liu, Ying Liu, Peter R Kowey, Yanli Zhang, Yue Chen, Yushan Wei, Lianjun Gao, Huihua Li, Jie Du, Yunlong Xia
BACKGROUND: Acquired long QT syndrome (ALQTS) has long been overlooked in clinical practice. Recent studies reported that severe ALQTS (QTc ≥500 ms) in hospitalized patients is associated with increased all-cause mortality. OBJECTIVE: We aimed to determine the role of ALQTS in the clinical outcomes of hospitalized patients. METHODS: Electronic medical records were reviewed to identify severe ALQTS in hospitalized patients in a single study center from 9-1-2013 to 2-28-2014...
March 16, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28322838/effect-of-antiarrhythmic-drugs-on-small-conductance-calcium-activated-potassium-channels
#17
Rafel Simó Vicens, Daniel R P Sauter, Morten Grunnet, Jonas G Diness, Bo H Bentzen
Atrial fibrillation (AF) is the most common type of arrhythmia. Current pharmacological treatment for AF is moderately effective and/or increases the risk of serious ventricular adverse effects. To avoid ventricular adverse effects, a new target has been considered, the small conductance calcium-activated K(+) channels (KCa2.X, SK channels). In the heart, KCa2.X channels are functionally more important in atria compared to ventricles, and pharmacological inhibition of the channel confers atrial selective prolongation of the cardiac action potential and converts AF to sinus rhythm in animal models of AF...
March 18, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28322302/mechanistic-insights-into-the-anti-angiogenic-activity-of-trypanosoma-cruzi-protein-21-and-its-potential-impact-on-the-onset-of-chagasic-cardiomyopathy
#18
Samuel Cota Teixeira, Daiana Silva Lopes, Sarah Natalie Cirilo Gimenes, Thaise Lara Teixeira, Marcelo Santos da Silva, Rebecca Tavares E Silva Brígido, Felipe Andrés Cordero da Luz, Aline Alves da Silva, Makswell Almeida Silva, Pilar Veras Florentino, Paula Cristina Brígido Tavares, Marlus Alves Dos Santos, Veridiana de Melo Rodrigues Ávila, Marcelo José Barbosa Silva, Maria Carolina Elias, Renato Arruda Mortara, Claudio Vieira da Silva
Chronic chagasic cardiomyopathy (CCC) is arguably the most important form of the Chagas Disease, caused by the intracellular protozoan Trypanosoma cruzi; it is estimated that 10-30% of chronic patients develop this clinical manifestation. The most common and severe form of CCC can be related to ventricular abnormalities, such as heart failure, arrhythmias, heart blocks, thromboembolic events and sudden death. Therefore, in this study, we proposed to evaluate the anti-angiogenic activity of a recombinant protein from T...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28320606/autoantibodies-with-beta-adrenergic-activity-from-chronic-chagasic-patients-induce-cardiac-arrhythmias-and-early-afterdepolarization-in-a-drug-induced-lqt2-rabbit-hearts
#19
Marco Antonio Vidal Jiménez, José H M Nascimento, Gustavo Monnerat, Leonardo Maciel, Claudia N Paiva, Roberto Coury Pedrosa, Antonio C Campos de Carvalho, Emiliano Medei
BACKGROUND: Cardiac arrhythmias are one of the main causes of death in ChCP and other dilated cardiomyopathies. Previous studies demonstrated that ventricular arrhythmias are associated with the presence of autoantibodies with beta-adrenergic activity, Ab-β. OBJECTIVES: The aim of this study was to investigate whether Ab-β, present in chronic chagasic patients (ChCP), induce cardiac arrhythmias in the pharmacological type-2 long QT syndrome model (LQTS-2). METHODS/RESULTS: The LQTS2 was established by perfusion of Tyrode saline solution with a potassium channel blocker E-4031 (5μM) in isolated rabbit hearts or in rabbit cardiac strips, in order to record ECG or action potential, respectively...
March 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28320259/levosimendan-for-hemodynamic-support-after-cardiac-surgery
#20
Giovanni Landoni, Vladimir V Lomivorotov, Gabriele Alvaro, Rosetta Lobreglio, Antonio Pisano, Fabio Guarracino, Maria G Calabrò, Evgeny V Grigoryev, Valery V Likhvantsev, Marcello F Salgado-Filho, Alessandro Bianchi, Vadim V Pasyuga, Massimo Baiocchi, Federico Pappalardo, Fabrizio Monaco, Vladimir A Boboshko, Marat N Abubakirov, Bruno Amantea, Rosalba Lembo, Luca Brazzi, Luigi Verniero, Pietro Bertini, Anna M Scandroglio, Tiziana Bove, Alessandro Belletti, Maria G Michienzi, Dmitriy L Shukevich, Tatiana S Zabelina, Rinaldo Bellomo, Alberto Zangrillo
Background Acute left ventricular dysfunction is a major complication of cardiac surgery and is associated with increased mortality. Meta-analyses of small trials suggest that levosimendan may result in a higher rate of survival among patients undergoing cardiac surgery. Methods We conducted a multicenter, randomized, double-blind, placebo-controlled trial involving patients in whom perioperative hemodynamic support was indicated after cardiac surgery, according to prespecified criteria. Patients were randomly assigned to receive levosimendan (in a continuous infusion at a dose of 0...
March 21, 2017: New England Journal of Medicine
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