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https://www.readbyqxmd.com/read/29223431/international-trends-in-clinical-characteristics-and-oral-anticoagulation-treatment-for-patients-with-atrial-fibrillation-results-from-the-garfield-af-orbit-af-i-and-orbit-af-ii-registries
#1
Benjamin A Steinberg, Haiyan Gao, Peter Shrader, Karen Pieper, Laine Thomas, A John Camm, Michael D Ezekowitz, Gregg C Fonarow, Bernard J Gersh, Samuel Goldhaber, Sylvia Haas, Werner Hacke, Peter R Kowey, Jack Ansell, Kenneth W Mahaffey, Gerald Naccarelli, James A Reiffel, Alexander Turpie, Freek Verheugt, Jonathan P Piccini, Ajay Kakkar, Eric D Peterson, Keith A A Fox
Atrial fibrillation (AF) is the most common cardiac arrhythmia in the world. We aimed to provide comprehensive data on international patterns of AF stroke prevention treatment. METHODS: Demographics, comorbidities, and stroke risk of the patients in the GARFIELD-AF (n=51,270), ORBIT-AF I (n=10,132), and ORBIT-AF II (n=11,602) registries were compared (overall N=73,004 from 35 countries). Stroke prevention therapies were assessed among patients with new-onset AF (≤6 weeks). RESULTS: Patients from GARFIELD-AF were less likely to be white (63% vs 89% for ORBIT-AF I and 86% for ORBIT-AF II) or have coronary artery disease (19% vs 36% and 27%), but had similar stroke risk (85% CHA2DS2-VASc ≥2 vs 91% and 85%) and lower bleeding risk (11% with HAS-BLED ≥3 vs 24% and 15%)...
December 2017: American Heart Journal
https://www.readbyqxmd.com/read/29222869/new-generation-cardioverter-defibrillator-lead-with-a-floating-atrial-sensing-dipole-long-term-performance
#2
Erdal Safak, Giuseppe D Ancona, Hilmi Kaplan, Evren Caglayan, Stephan Kische, Alper Öner, Hüseyin Ince, Jasmin Ortak
OBJECTIVES: Study aim is to present the long-term performance of a new generation implantable cardioverter defibrillator (ICD) electrode with floating atrial dipole (Linox S DX, Biotronik). BACKGROUND: The single ICD electrode with a floating dipole in the atrial chamber was introduced about 15 years ago to overcome risk of inappropriate shock. METHODS: After implant, internal ECG data were prospectively collected via tele-monitoring (Home Monitoring, Biotronik)...
December 9, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29222043/catheter-ablation-of-atrial-fibrillation-in-patients-with-heart-failure-and-preserved-ejection-fraction
#3
Eric Black-Maier, Xinru Ren, Benjamin A Steinberg, Cynthia L Green, Adam S Barnett, Normita Sta Rosa, Sana M Al-Khatib, Brett D Atwater, James P Daubert, Camille Frazier-Mills, Augustus O Grant, Donald D Hegland, Kevin P Jackson, Larry R Jackson, Jason I Koontz, Robert K Lewis, Albert Y Sun, Kevin L Thomas, Tristam D Bahnson, Jonathan P Piccini
BACKGROUND: Few studies have examined outcomes of catheter ablation for atrial fibrillation (AF) in patients with heart failure with preserved ejection fraction (HFpEF). OBJECTIVE: Compare outcomes of AF ablation in patients with HFpEF versus HF with reduced ejection fraction (HFrEF). METHODS: We performed a retrospective study of 230 patients with HF who underwent AF ablation, including 97 (42.2%) with HFrEF and 133 (57.8%) with HFpEF. Outcomes included adverse events, symptoms (Mayo AF Symptom Inventory [MAFSI]), New York Heart Association (NYHA) functional class, and freedom from recurrent atrial arrhythmia at 12-months...
December 5, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29221736/differential-effects-of-operative-complications-on-survival-after-surgery-for-primary-lung-cancer
#4
Felix G Fernandez, Andrzej S Kosinski, Anthony P Furnary, Mark Onaitis, Sunghee Kim, Robert H Habib, Betty C Tong, Patricia Cowper, Daniel Boffa, Jeffrey P Jacobs, Cameron D Wright, Joe B Putnam
OBJECTIVE: Complications adversely affect survival after lung cancer surgery. We tested the hypothesis that effects of complications after lung cancer surgery on survival vary substantially across the spectrum of postoperative complications. METHODS: The Society of Thoracic Surgeons General Thoracic Surgery Database was linked to Medicare data for lung cancer resections from 2002 through 2013. Linkage was achieved for 29,899 patients. A survival model was created that included operative complications as explanatory variables and adjusted for relevant baseline covariates...
November 13, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29221681/hypercalcemic-crisis-and-primary-hyperparathyroidism-cause-of-an-unusual-electrical-storm
#5
Tatiana Guimarães, Miguel Nobre Menezes, Diogo Cruz, Sónia do Vale, Armando Bordalo, Arminda Veiga, Fausto J Pinto, Dulce Brito
Hypercalcemia is a known cause of heart rhythm disorders, however its association with ventricular arrhythmias is rare. The authors present a case of a fifty-three years old male patient with a ischemic and ethanolic dilated cardiomyopathy, and severely reduced ejection fraction, carrier of cardiac resynchronization therapy (CRT) with cardioverter defibrillator (ICD), admitted in the emergency department with an electrical storm, with multiple appropriated ICD shocks, refractory to antiarrhythmic therapy. In the etiological investigation was documented severe hypercalcemia secondary to primary hyperparathyroidism undiagnosed until then...
December 5, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29221605/significance-of-high-sensitivity-troponin-t-after-elective-external-direct-current-cardioversion-for-atrial-fibrillation-or-atrial-flutter
#6
Ronstan Lobo, Allan S Jaffe, Ciara Cahill, Ophelia Blake, Syed Abbas, Thomas B Meany, Terrence Hennessy, Thomas J Kiernan
External transthoracic direct current (DC) cardioversion is a commonly used method of terminating cardiac arrhythmias. Previous research has shown that DC cardioversion resulted in myocardial injury as evidenced by increased levels of cardiac troponin, even though only minimally. Many of these studies were based on the outdated monophasic defibrillators and older, less sensitive troponin assays. This study aimed to assess the effect of external transthoracic DC cardioversion on myocardial injury as measured by the change in the new high-sensitivity cardiac troponin T (hs-cTnT) using the more modern biphasic defibrillators...
October 19, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29221435/exploring-digenic-inheritance-in-arrhythmogenic-cardiomyopathy
#7
Eva König, Claudia Béu Volpato, Benedetta Maria Motta, Hagen Blankenburg, Anne Picard, Peter Pramstaller, Michela Casella, Werner Rauhe, Giulio Pompilio, Viviana Meraviglia, Francisco S Domingues, Elena Sommariva, Alessandra Rossini
BACKGROUND: Arrhythmogenic cardiomyopathy (ACM) is an inherited genetic disorder, characterized by the substitution of heart muscle with fibro-fatty tissue and severe ventricular arrhythmias, often leading to heart failure and sudden cardiac death. ACM is considered a monogenic disorder, but the low penetrance of mutations identified in patients suggests the involvement of additional genetic or environmental factors. METHODS: We used whole exome sequencing to investigate digenic inheritance in two ACM families where previous diagnostic tests have revealed a PKP2 mutation in all affected and some healthy individuals...
December 8, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/29220423/tpeak-tend-interval-during-therapeutic-hypothermia-can-predict-upcoming-ventricular-fibrillation-in-subjects-with-aborted-arrhythmic-sudden-cardiac-death-3-years-follow-up-results
#8
Namsik Yoon, Seo Hong, Aaron Glass, Sung Soo Kim, Min Chul Kim, Jae Yeong Cho, Ki Hong Lee, Doo Sun Sim, Hyun Ju Yoon, Kye Hun Kim, Young Joon Hong, Hyung Wook Park, Ju Han Kim, Youngkeun Ahn, Myung Jeong, Jong Chun Park, Jeong Gwan Cho
Aims: Prolonged Tpeak-Tend interval has been shown to be markers of arrhythmogenesis in various cardiac disorders. However, its dynamicity is one of the obstacles to predict fatal ventricular arrhythmia. This study investigated whether Tpeak-Tend interval during therapeutic hypothermia (TH) is associated with ventricular fibrillation (VF) inducibility and clinical arrhythmia in subjects with aborted arrhythmic sudden cardiac death (SCD). Methods and results: The study group included 31 patients (24 males, age 39...
December 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29219824/thyrotoxic-periodic-paralysis-an-unusual-presentation-of-hyperthyroidism
#9
M Salih, C M J van Kinschot, R P Peeters, W W de Herder, E J J Duschek, J van der Linden, C van Noord
Thyrotoxic periodic paralysis (TPP) is a complication of hyperthyroidism among Asians, characterised by sudden onset of hypokalaemia and muscle paralysis. Several factors may contribute to a delay in diagnosis, including the subtlety of hyperthyroidism, the transient nature of the events and the rarity of this disease in the West. As life-threatening arrhythmias may occur during an attack, awareness among physicians is necessary for early recognition and treatment. Advances have been made in understanding the pathophysiological mechanism leading to hypokalaemia, which include recently identified mutations of the inwardly rectifying potassium channel Kir2...
October 2017: Netherlands Journal of Medicine
https://www.readbyqxmd.com/read/29219167/quantitative-understanding-of-qtc-prolongation-and-gender-as-risk-factors-for-torsade-de-pointes
#10
Lars Johannesen, Christine Garnett, Man Luo, Shari Targum, Jens Stampe Sørensen, Nitin Mehrotra
Several risk factors for development of a potentially fatal ventricular arrhythmia, torsade de pointes, have been observed, including female gender. However, in most investigations, only few torsade events were included and/or rarely were postdose heart rate corrected QT (QTc) measurements included, as a surrogate of drug exposure. We developed a multivariate logistic regression model using data from 22,214 patients (33% women) with 84 torsade events (56% women) to evaluate the relationship between risk factors for torsade using data from four anti-arrhythmic drug development programs...
December 8, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29218644/cardiovascular-complications-of-marijuana-and-related-substances-a-review
#11
REVIEW
Amitoj Singh, Sajeev Saluja, Akshat Kumar, Sahil Agrawal, Munveer Thind, Sudip Nanda, Jamshid Shirani
The recreational use of cannabis has sharply increased in recent years in parallel with its legalization and decriminalization in several countries. Commonly, the traditional cannabis has been replaced by potent synthetic cannabinoids and cannabimimetics in various forms. Despite overwhelming public perception of the safety of these substances, an increasing number of serious cardiovascular adverse events have been reported in temporal relation to recreational cannabis use. These have included sudden cardiac death, vascular (coronary, cerebral and peripheral) events, arrhythmias and stress cardiomyopathy among others...
December 7, 2017: Cardiology and Therapy
https://www.readbyqxmd.com/read/29218248/propafenone-suppresses-esophageal-cancer-proliferation-through-inducing-mitochondrial-dysfunction
#12
Wei-Bin Zheng, Yang-Jia Li, Yang Wang, Jie Yang, Can-Can Zheng, Xiao-Hui Huang, Bin Li, Qing-Yu He
Esophageal squamous cell carcinoma (ESCC) is one of the most common malignant tumors with poor survival and limited therapeutic options. The aim of this study is to identify novel anticancer strategies from existing Food and Drug Administration (FDA)-approved drugs that have been used to clinically treat other diseases. Here, propafenone, an antiarrhythmic medication, was found to induce apoptosis and exert a significantly inhibitory effect on the proliferation and colony-forming ability of ESCC cells in a dose-dependent manner without observed cytotoxicity on normal esophageal epithelial cells...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29218065/acute-myocardial-injury-in-a-child-with-duchenne-muscular-dystrophy-pulse-steroid-therapy
#13
Eliza Cinteza, Claudiu Stoicescu, Niculina Butoianu, Mihaela Balgradean, Alin Nicolescu, Matthias Angrés
Heart implication in Duchenne muscular dystrophy usually is present in the form of dilated cardiomyopathy, manifested as heart failure and arrhythmias. To delay progression, including heart deterioration, prednisone is recommended as preventive treatment. We report the case of an 11-year-old boy diagnosed with Duchenne muscular dystrophy at the age of seven, who was on preventive treatment with oral prednisone (0.75 mg/kg/day) and beta blocker (metoprolol, 1 mg/kg/day). Suddenly, the patient presented acute chest pain, vomiting and sweating...
September 2017: Mædica
https://www.readbyqxmd.com/read/29218016/synergistic-anti-arrhythmic-effects-in-human-atria-with-combined-use-of-sodium-blockers-and-acacetin
#14
Haibo Ni, Dominic G Whittaker, Wei Wang, Wayne R Giles, Sanjiv M Narayan, Henggui Zhang
Atrial fibrillation (AF) is the most common cardiac arrhythmia. Developing effective and safe anti-AF drugs remains an unmet challenge. Simultaneous block of both atrial-specific ultra-rapid delayed rectifier potassium (K+) current (IKur) and the Na+ current (INa) has been hypothesized to be anti-AF, without inducing significant QT prolongation and ventricular side effects. However, the antiarrhythmic advantage of simultaneously blocking these two channels vs. individual block in the setting of AF-induced electrical remodeling remains to be documented...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29217664/incidence-diagnosis-and-management-of-qt-prolongation-induced-by-cancer-therapies-a-systematic-review
#15
REVIEW
Andreu Porta-Sánchez, Cameron Gilbert, Danna Spears, Eitan Amir, Joyce Chan, Kumaraswamy Nanthakumar, Paaladinesh Thavendiranathan
BACKGROUND: The cardiovascular complications of cancer therapeutics are the focus of the burgeoning field of cardio-oncology. A common challenge in this field is the impact of cancer drugs on cardiac repolarization (ie, QT prolongation) and the potential risk for the life-threatening arrhythmia torsades de pointes. Although QT prolongation is not a perfect marker of arrhythmia risk, this has become a primary safety metric among oncologists. Cardiologists caring for patients receiving cancer treatment should become familiar with the drugs associated with QT prolongation, its incidence, and appropriate management strategies to provide meaningful consultation in this complex clinical scenario...
December 7, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29217463/electrical-storm-in-the-early-phase-of-heartmate%C3%A2-ii-device-implantation-incidence-risk-factors-and-prognosis
#16
Jerome Corre, François Picard, Rodrigue Garcia, Adlane Zemmoura, Nicolas Derval, Arnaud Denis, Antoine Romen, Karine Nubret, Pierre Jais, Michel Haissaguerre, Pierre Dos Santos, Laurent Barandon, Frederic Sacher
BACKGROUND: Ventricular arrhythmia is common after left ventricular assist device (LVAD) implantation, especially in the early postoperative phase (<30 days). AIM: To identify the incidence of and risk factors for electrical storm (ES) occurring within 30 days of HeartMate® II implantation. METHODS: We reviewed data from all consecutive patients undergoing HeartMate® II device implantation at our institution from January 2008 to December 2014...
December 4, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/29217433/hypertrophic-cardiomyopathy-linked-mutation-in-troponin-t-causes-myofibrillar-disarray-and-pro-arrhythmic-action-potential-changes-in-human-ipsc-cardiomyocytes
#17
Lili Wang, Kyungsoo Kim, Shan Parikh, Adrian Gabriel Cadar, Kevin R Bersell, Huan He, Jose R Pinto, Dmytro O Kryshtal, Bjorn C Knollmann
BACKGROUND: Mutations in cardiac troponin T (TnT) are linked to increased risk of ventricular arrhythmia and sudden death despite causing little to no cardiac hypertrophy. Studies in mice suggest that the hypertrophic cardiomyopathy (HCM)-associated TnT-I79N mutation increases myofilament Ca sensitivity and is arrhythmogenic, but whether findings from mice translate to human cardiomyocyte electrophysiology is not known. OBJECTIVES: To study the effects of the TnT-I79N mutation in human cardiomyocytes...
December 4, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29216988/catheter-ablation-of-ventricular-tachycardia-in-structural-heart-disease-indications-strategies-and-outcomes-part-ii
#18
REVIEW
Srinivas R Dukkipati, Jacob S Koruth, Subbarao Choudry, Marc A Miller, William Whang, Vivek Y Reddy
In contrast to ventricular tachycardia (VT) that occurs in the setting of a structurally normal heart, VT that occurs in patients with structural heart disease carries an elevated risk for sudden cardiac death (SCD), and implantable cardioverter-defibrillators (ICDs) are the mainstay of therapy. In these individuals, catheter ablation may be used as adjunctive therapy to treat or prevent repetitive ICD therapies when antiarrhythmic drugs are ineffective or not desired. However, certain patients with frequent premature ventricular contractions (PVCs) or VT and tachycardiomyopathy should be considered for ablation before ICD implantation because left ventricular function may improve, consequently decreasing the risk of SCD and obviating the need for an ICD...
December 12, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29216818/neuroprotective-effects-of-amiodarone-in-a-mouse-model-of-ischemic-stroke
#19
Masakazu Kotoda, Tadahiko Ishiyama, Kazuha Mitsui, Sohei Hishiyama, Takashi Matsukawa
BACKGROUND: Ion channels play a crucial role in the development of ischemic brain injury. Recent studies have reported that the blockade of various types of ion channels improves outcomes in experimental stroke models. Amiodarone, one of the most effective drugs for life-threatening arrhythmia, works as a multiple channel blocker and its characteristics cover all four Vaughan-Williams classes. Although it is known that amiodarone indirectly contributes to preventing ischemic stroke by maintaining sinus rhythm in patients with atrial fibrillation, the direct neuroprotective effect of amiodarone has not been clarified...
December 8, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/29216239/effects-of-early-afterdepolarizations-on-excitation-patterns-in-an-accurate-model-of-the-human-ventricles
#20
Enid Van Nieuwenhuyse, Gunnar Seemann, Alexander V Panfilov, Nele Vandersickel
Early Afterdepolarizations, EADs, are defined as the reversal of the action potential before completion of the repolarization phase, which can result in ectopic beats. However, the series of mechanisms of EADs leading to these ectopic beats and related cardiac arrhythmias are not well understood. Therefore, we aimed to investigate the influence of this single cell behavior on the whole heart level. For this study we used a modified version of the Ten Tusscher-Panfilov model of human ventricular cells (TP06) which we implemented in a 3D ventricle model including realistic fiber orientations...
2017: PloS One
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