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https://www.readbyqxmd.com/read/28645806/brugada-syndrome-a-general-cardiologist-s-perspective
#1
REVIEW
Marija M Polovina, Milica Vukicevic, Bojan Banko, Gregory Y H Lip, Tatjana S Potpara
Brugada syndrome (BrS) is one of the commonest inherited primary arrhythmia syndromes typically presenting with arrhythmic syncope or sudden cardiac death (SCD) due to polymorphic ventricular tachycardia and ventricular fibrillation precipitated by vagotonia or fever in apparently healthy adults, less frequently in children. The prevalence of the syndrome (0.01%-0.3%) varies among regions and ethnicities, being the highest in Southeast Asia. BrS is diagnosed by the "coved type" ST-segment elevation≥2mm followed by a negative T-wave in ≥1 of the right precordial leads V1-V2...
June 20, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28645776/selective-inhibition-of-flt3-by-gilteritinib-in-relapsed-or-refractory-acute-myeloid-leukaemia-a-multicentre-first-in-human-open-label-phase-1-2-study
#2
Alexander E Perl, Jessica K Altman, Jorge Cortes, Catherine Smith, Mark Litzow, Maria R Baer, David Claxton, Harry P Erba, Stan Gill, Stuart Goldberg, Joseph G Jurcic, Richard A Larson, Chaofeng Liu, Ellen Ritchie, Gary Schiller, Alexander I Spira, Stephen A Strickland, Raoul Tibes, Celalettin Ustun, Eunice S Wang, Robert Stuart, Christoph Röllig, Andreas Neubauer, Giovanni Martinelli, Erkut Bahceci, Mark Levis
BACKGROUND: Internal tandem duplication mutations in FLT3 are common in acute myeloid leukaemia and are associated with rapid relapse and short overall survival. The clinical benefit of FLT3 inhibitors in patients with acute myeloid leukaemia has been limited by rapid generation of resistance mutations, particularly in codon Asp835 (D835). We aimed to assess the highly selective oral FLT3 inhibitor gilteritinib in patients with relapsed or refractory acute myeloid leukaemia. METHODS: In this phase 1-2 trial, we enrolled patients aged 18 years or older with acute myeloid leukaemia who either were refractory to induction therapy or had relapsed after achieving remission with previous treatment...
June 20, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28645513/atrial-fibrillation-current-therapies
#3
REVIEW
Romain Pariaut
A rate control or a rhythm control strategy can be applied to the management of atrial fibrillation. Rate control of atrial fibrillation consists of decreasing the ventricular response rate by limiting the number of supraventricular impulses that can travel through the atrioventricular node. The goal of decreasing heart rate in dogs with atrial fibrillation is usually achieved with a combination of the calcium channel blocker diltiazem and digoxin. Rhythm control of atrial fibrillation encompasses pharmacologic and nonpharmacologic methods to terminate the arrhythmia and restore sinus rhythm...
June 20, 2017: Veterinary Clinics of North America. Small Animal Practice
https://www.readbyqxmd.com/read/28642118/current-state-of-the-art-for-cardiac-arrhythmia-gene-therapy
#4
REVIEW
J Kevin Donahue
Cardiac arrhythmias are a leading cause of morbidity and mortality. Currently available therapeutic options lack sufficient efficacy and safety. Gene therapy has been proposed for treatment of cardiac arrhythmias. This review will discuss the current state of development for arrhythmia gene therapy. So far, all published studies are short-term, proof-of-concept animal studies. Potential replacement of cardiac pacemakers has been shown for combination gene therapy using the HCN2 gene and either the gene for adenylate cyclase, the skeletal muscle isoform of the sodium channel, or a dominant negative mutant of the potassium channel responsible for resting membrane potential...
June 19, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28641397/myocardial-scar-location-as-detected-by-cardiac-magnetic-resonance-is-associated-with-the-outcome-in-heart-failure-patients-undergoing-surgical-ventricular-reconstruction
#5
Serenella Castelvecchio, Giulia Careri, Federico Ambrogi, Antonia Camporeale, Lorenzo Menicanti, Francesco Secchi, Massimo Lombardi
OBJECTIVES: Post-infarction myocardial scar causes adverse left ventricular remodelling and negatively affects the prognosis. We sought to investigate whether scar extent and location obtained by cardiac magnetic resonance may affect the reverse remodelling and survival of heart failure patients undergoing surgical ventricular reconstruction. METHODS: From January 2011 to December 2015, 151 consecutive patients with previous myocardial infarction and left ventricular remodelling underwent surgical ventricular reconstruction at our Institution, of which 88 (58%) patients had a preoperative protocol-standardized late gadolinium enhancement (LGE)-cardiac magnetic resonance examination during the week before surgery...
June 21, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28640140/aldosterone-and-renin-in-cardiac-patients-referred-for-catheterization
#6
Paul Erne, Andrea Müller, Gian Paolo Rossi, Burkhardt Seifert, Fabrice Stehlin, Maurice Redondo, Peter T Bauer, Richard Kobza, Therese J Resink, Dragana Radovanovic
Little is known regarding alterations of the renin-angiotensin system in patients referred for cardiac catheterization. Here, we measured plasma levels of active renin and aldosterone in patients referred for cardiac catheterization in order to determine the prevalence of elevated renin, aldosterone, and the aldosterone-renin ratio.A chemiluminescence assay was used to measure plasma aldosterone concentration (PAC) and active renin levels in 833 consecutive patients, after an overnight fasting and without any medication for least 12 hours...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28639949/comet-assay-in-evaluating-deoxyribonucleic-acid-damage-after-out-of-hospital-cardiac-arrest
#7
Radka Hazuková, Martina Rezácová, Renata Köhlerová, Tomáš Tomek, Eva Cermáková, Jaromír Kocí, Miloslav Pleskot
OBJECTIVE: This study aimed to investigate whether out-of-hospital cardiac arrest (OHCA) may induce severe DNA damage measured using comet assay in successfully resuscitated humans and to evaluate a short-term prognostic role. METHODS: In this prospective, controlled, blinded study (1/2013-1/2014), 41 patients (age, 63±14 years) successfully resuscitated from non traumatic OHCA and 10 healthy controls (age, 53±17 years) were enrolled. DNA damage [double-strand breaks (DSBs) and single-strand breaks (SSBs)] was measured using comet assay in peripheral lymphocytes sampled at admission...
June 22, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28639243/right-atrial-myocardial-deformation-by-two-dimensional-speckle-tracking-echocardiography-predicts-recurrence-in-paroxysmal-atrial-fibrillation
#8
Malini Govindan, Anatoli Kiotsekoglou, Samir K Saha, A John Camm
BACKGROUND: Atrial fibrillation (AF) is a bi-atrial disease yet little attention has been given to right heart function in AF. We propose that the assessment of right atrial (RA) and right ventricular function (RV) using two-dimensional speckle tracking echocardiography (2D-STE) could be valuable in predicting AF recurrence in patients with paroxysmal AF (PAF). METHODS: Thirty patients with PAF were prospectively recruited from a dedicated AF clinic. Right atrial size, volume, and area and RV dimensions were analyzed along with RA and RV strain derived from 2D-STE at baseline and at 3 and 12 months...
June 21, 2017: Journal of Echocardiography
https://www.readbyqxmd.com/read/28639003/the-crucial-role-of-activin-a-alk4-pathway-in-the-pathogenesis-of-ang-ii-induced-atrial-fibrosis-and-vulnerability-to-atrial-fibrillation
#9
Qian Wang, Ying Yu, Pengpai Zhang, Yihe Chen, Changyi Li, Jie Chen, Yuepeng Wang, Yigang Li
Atrial fibrosis, the hallmark of structural remodeling associated with atrial fibrillation (AF), is characterized by abnormal proliferation of atrial fibroblasts and excessive deposition of extracellular matrix. Transforming growth factor-β1 (TGF-β1)/activin receptor-like kinase 5 (ALK5)/Smad2/3/4 pathway has been reported to be involved in the process. Recent studies have implicated both activin A and its specific downstream component activin receptor-like kinase 4 (ALK4) in stimulating fibrosis in non-cardiac organs...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28638575/danon-disease-for-the-cardiologist-case-report-and-review-of-the-literature
#10
Ryan S D'souza, Luisa Mestroni, Matthew R G Taylor
Danon disease is a rare, X-linked dominant genetic disorder that is caused by defects in the lysosome-associated membrane protein 2 (LAMP2) gene. It manifests predominantly in young males with a classic triad of cardiomyopathy, skeletal myopathy, and intellectual disability. Death from cardiac disease is the ultimate cause of demise in many patients if left untreated. Given the rarity of the condition, the natural history is poorly understood. Here, we present a case report on a 14-year-old Hispanic boy with Danon disease, highlighting major clinical events and diagnostic study findings over a six-year period from age of symptom onset to age of death...
March 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/28634079/relaxin-reduces-susceptibility-to-post-infarct-atrial-fibrillation-in-mice-due-to-anti-fibrotic-and-anti-inflammatory-properties
#11
Thomas Beiert, Vedat Tiyerili, Vincent Knappe, Verena Effelsberg, Markus Linhart, Florian Stöckigt, Sabine Klein, Robert Schierwagen, Jonel Trebicka, Georg Nickenig, Jan W Schrickel, René P Andrié
BACKGROUND: Relaxin-2 (RLX) is a peptide hormone that exerts beneficial anti-fibrotic and anti-inflammatory effects in diverse models of cardiovascular disease. The goal of this study was to determine the effects of RLX treatment on the susceptibility to atrial fibrillation (AF) after myocardial infarction (MI). METHODS: Mice with cryoinfarction of the left anterior ventricular wall were treated for two weeks with either RLX (75 μg/kg/d) or vehicle (sodium acetate) delivered via subcutaneously implanted osmotic minipumps...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28633348/lifelong-arrhythmic-risk-stratification-in-arrhythmogenic-right-ventricular-cardiomyopathy-distribution-of-events-and-impact-of-periodical-reassessment
#12
Chiara Cappelletto, Davide Stolfo, Antonio De Luca, Bruno Pinamonti, Giulia Barbati, Alberto Pivetta, Marco Gobbo, Francesca Brun, Marco Merlo, Gianfranco Sinagra
Aims: The arrhythmic risk stratification of arrhythmogenic right ventricular cardiomyopathy (ARVC) remains controversial. We evaluated the long-term distribution of life-threatening arrhythmic events assessing the impact of periodical risk reassessment. Methods and results: Ninety-eight ARVC patients with no previous major ventricular arrhythmias were retrospectively analysed. Patients were assessed at baseline, at 22 [inter-quartile range (IQR) 16-26], 49 (IQR 41-55) and 97 months (IQR 90-108)...
June 13, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28631077/noninvasive-evaluation-of-reverse-atrial-remodeling-after-catheter-ablation-of-atrial-fibrillation-by-p-wave-dispersion
#13
Yuhi Fujimoto, Kenji Yodogawa, Kenta Takahashi, Ippei Tsuboi, Hiroshi Hayashi, Shunsuke Uetake, Yu-Ki Iwasaki, Meiso Hayashi, Yasushi Miyauchi, Wataru Shimizu
Atrial fibrillation (AF) itself creates structural and electrophysiological changes such as atrial enlargement, shortening of refractory period and decrease in conduction velocity, called "atrial remodeling", promoting its persistence. Although the remodeling process is considered to be reversible, it has not been elucidated in detail. The aim of this study was to assess the feasibility of P wave dispersion in the assessment of reverse atrial remodeling following catheter ablation of AF. Consecutive 126 patients (88 males, age 63...
June 19, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28630373/incidence-and-time-course-for-developing-heart-failure-with-high-burden-right-ventricular-pacing
#14
Faisal M Merchant, Michael H Hoskins, Dan L Musat, Julie B Prillinger, Gregory J Roberts, Yelena Nabutovsky, Suneet Mittal
BACKGROUND: Although right ventricular pacing can contribute to cardiomyopathy, the impact of complete atrioventricular block (cAVB) on heart failure (HF) development in pacemaker patients has not been well characterized. We evaluated the incidence and time course for developing HF after pacemaker implantation for cAVB. METHODS AND RESULTS: A MarketScan database identified patients undergoing dual-chamber pacemaker implantation from 2008 to 2014. Patients with cAVB were identified by an atrioventricular node ablation or diagnosis of third-degree AVB...
June 2017: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/28627809/ivabradine-reduces-digitalis-induced-ventricular-arrhythmias
#15
Gerrit Frommeyer, Jan Weller, Christian Ellermann, Nils Bögeholz, Patrick Leitz, Dirk G Dechering, Simon Kochhäuser, Kristina Wasmer, Lars Eckardt
The I(f) channel inhibitor ivabradine is recommended for treatment of heart failure but also affects potassium currents and thereby prolongs ventricular repolarization. The aim of the present study was to examine the electrophysiological effects of ivabradine on digitalis-induced ventricular arrhythmias. Thirteen rabbit hearts were isolated and Langendorff-perfused. After obtaining baseline data, the digitalis glycoside ouabain was infused (0.2μM). Monophasic action potentials and ECG showed a significant abbreviation of QT interval (-34ms,p<0...
June 19, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28627670/intermedin-improves-cardiac-function-and-sympathetic-neural-remodeling-in-a-rat-model-of-post-myocardial-infarction-heart-failure
#16
Bin Xu, Hao Xu, Heng Cao, Xiaoxiao Liu, Chunhuan Qin, Yanzhou Zhao, Xiaolin Han, Hongli Li
Emerging evidence has suggested that intermedin (IMD), a novel member of the calcitonin gene‑related peptide (CGRP) family, has a wide range of cardioprotective effects. The present study investigated the effects of long‑term administration of IMD on cardiac function and sympathetic neural remodeling in heart failure (HF) rats, and studied potential underlying mechanism. HF was induced in rats by myocardial infarction (MI). Male Sprague Dawley rats were randomly assigned to either saline or IMD (0.6 µg/kg/h) treatment groups for 4 weeks post‑MI...
June 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28627231/a-novel-risk-scoring-system-to-predict-cardiovascular-death-in-patients-with-acute-myocardial-infarction-cha2ds2-vasc-cf-score
#17
Harun Kundi, Emrullah Kiziltunc, Ahmet Korkmaz, Gokhan Cicek, Ender Ornek, Mehmet Ileri
The present study aimed to determine the long-term prognostic validity of the CHA2DS2-VASc score in patients with acute myocardial infarction (AMI). In addition, we formulated a novel scoring system, the CHA2DS2-VASc-CF (which includes cigarette smoking and a family history of coronary artery disease as risk factors). This study included 4373 consecutive patients with AMI who presented to the emergency department of our hospital and underwent cardiac catheterization procedures between December 2009 and September 2016...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28625400/successful-treatment-of-ventricular-fibrillation-storm-triggered-by-short-long-short-sequence-time-to-avoid-managed-ventricular-pacing
#18
Hilmi Alnsasra, Yuval Konstantino, Sergiy Bereza, Moti Haim
Sudden cardiac death (SCD) in hypertrophic cardiomyopathy (HCM) is caused by ventricular tachyarrhythmia that can be effectively treated by implantable cardioverter defibrillator (ICD) therapy. We report of a 28-year-old man with HCM and a dual chamber ICD, originally implanted for primary prevention of SCD, (programmed to AAI(R)-DDD(R); managed ventricular pacing (MVP) mode, Medtronic Inc. St Paul, MN USA). He presented with recurrent ICD shocks due to ventricular fibrillation (VF) despite antiarrhythmic therapy...
June 8, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28625379/reliability-of-updated-left-ventricular-diastolic-function-recommendations-in-predicting-elevated-left-ventricular-filling-pressure-and-prognosis
#19
Kimi Sato, Andrew D M Grant, Kazuaki Negishi, Paul C Cremer, Tomoko Negishi, Arnav Kumar, Patrick Collier, Samir R Kapadia, Richard A Grimm, Milind Y Desai, Brian P Griffin, Zoran B Popović
An updated 2016 echocardiographic algorithm for diagnosing left ventricular (LV) diastolic dysfunction (DD) was recently proposed. We aimed to assess the reliability of the 2016 echocardiographic LVDD grading algorithm in predicting elevated LV filling pressure and clinical outcomes compared to the 2009 version. METHODS: We retrospectively identified 460 consecutive patients without atrial fibrillation or significant mitral valve disease who underwent transthoracic echocardiography within 24 hours of elective heart catheterization...
July 2017: American Heart Journal
https://www.readbyqxmd.com/read/28625244/-establishment-of-porcine-model-of-prolonged-cardiac-arrest-and-cardiopulmonary-resuscitation-electrically-induced-by-ventricular-fibrillation
#20
Cai Wen, Heng Li, Xiaozhu Zhai, Youde Ding, Huatao Zhou, Zhiming Ouyang, Zhengfei Yang, Longyuan Jiang, Wanchun Tang, Tao Yu
OBJECTIVE: To investigate the optimal injury time point of cardiac arrest (CA) induced electrically, and establish a reproducible prolonged CA and cardiopulmonary resuscitation (CPR) model in pigs. METHODS: Forty healthy domestic male pigs were randomly divided into four groups, which were ventricular fibrillation (VF) 8, 10, 11, and 12 minutes groups, each group for 10 animals. In these groups, VF was induced by alternating current delivered to right ventricular endocardium and untreated for 8, 10, 11, and 12 minutes, respectively, followed by 6 minutes of CPR procedure...
June 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
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