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https://www.readbyqxmd.com/read/28220241/-icd-in-elderly-patients
#1
Carsten W Israel
Treatment with an implantable cardioverter-defibrillator (ICD) represents a prognostic but not symptomatic therapy. It should therefore be restricted to patients where an improvement of prognosis is possible and reasonable. ICD implantation should only be performed in patients with a life expectancy of at least 1 year at reasonable quality of life. The decision in which patient improvement of prognosis is no longer a desirable target is problematic, both medically and ethically. It is not entirely clear in which elderly patient an ICD therapy can convey prognostic benefit despite comorbidity and competitive life-threatening diseases, as it is unclear how old age should be defined...
February 20, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28208496/extension-of-discrete-tribocharging-models-to-continuous-size-distributions
#2
Dylan Carter, Christine Hartzell
Triboelectric charging, the phenomenon by which electrical charge is exchanged during contact between two surfaces, has been known to cause significant charge separation in granular mixtures, even between chemically identical grains. This charging is a stochastic size-dependent process resulting from random collisions between grains. The prevailing models and experimental results suggest that, in most cases, larger grains in a mixture of dielectric grains acquire a positive charge, while smaller grains charge negatively...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28187168/outcomes-of-ventricular-tachycardia-ablation-in-patients-with-structural-heart-disease-the-impact-of-electrical-storm
#3
Bashar Aldhoon, Dan Wichterle, Petr Peichl, Robert Čihák, Josef Kautzner
AIMS: To investigate predictors of long-term outcomes after catheter ablation (CA) for ventricular tachycardia (VT) and the impact of electrical storm (ES) prior to index ablation procedures. METHODS: We studied consecutive patients with structural heart disease and VT (n = 328; age: 63±12 years; 88% males; 72% ischaemic cardiomyopathy; LVEF: 32±12%) who had undergone CA. According to presenting arrhythmia at baseline, they were divided into ES (n = 93, 28%) and non-ES groups...
2017: PloS One
https://www.readbyqxmd.com/read/28183572/cervical-sympathetic-blockade-for-the-management-of-electrical-storm
#4
Rehan Ali, Jeffrey Ciccone, Victor Tseng
A 75-year-old man presented with dizziness and fatigue secondary to ventricular and supraventricular arrhythmias. He underwent an elective ablation but continued to suffer from ventricular tachycardia with cardiovascular instability despite antiarrhythmic therapy with multiple agents. The patient continued to develop episodes of ventricular tachycardia and an episode of ventricular fibrillation. Electrical storm encompasses a situation of cardiac instability which may present as several episodes of ventricular tachycardia or ventricular fibrillation in a short period...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28159430/-jamaican-stone-a-potentially-lethal-remedy-for-delaying-ejaculation
#5
Belén Díaz-Antón, Guillermo Alonso-Deniz, Jose Luis Perez-Vela, Javier Molina-Martín de Nicolás, Belen Rubio-Alonso, Alfonso Jurado-Román, Ana Miguel-Gutierrez, Roberto Martin-Asenjo
Poisoning by ingestion of 'Jamaican Stone', a kind of cardioactive steroid, is extremely rare. However, mortality is very high. For this reason, when it occurs, an early and accurate diagnosis represents a critical challenge for clinicians. We present an unusual case of electrical storm caused by this substance.
February 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28139837/long-term-follow-up-of-arrhythmogenic-right-ventricular-cardiomyopathy-patients-with-an-implantable-cardioverter-defibrillator-for-prevention-of-sudden-cardiac-death
#6
Kang Yin, Ligang Ding, Yuqiu Li, Wei Hua
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a rare inherited cardiomyopathywith a high burden of ventricular arrhythmia, which is an important cause of suddencardiac death (SCD). Implantable cardioverter-defibrillator (ICD) is believed to be the most reliable management against SCD. HYPOTHESIS: Ventricular arrhythmia does not necessarily confer a poor prognosis in ARVC patients with an ICD. METHODS: A total of 39 ARVC patients (34 male) implanted with an ICD at our electrophysiologycenter and followed up continuously were included in this study...
January 31, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28127437/effect-of-extracorporeal-cytokine-removal-on-vascular-barrier-function-in-a-septic-shock-patient
#7
Sascha David, Kristina Thamm, Bernhard M W Schmidt, Christine S Falk, Jan T Kielstein
BACKGROUND: Sepsis and septic shock are major healthcare problems, affecting millions of individuals around the world each year. Pathophysiologically, septic multiple organ dysfunction (MOD) is a life-threatening condition caused by an overwhelming systemic inflammatory response of the host's organism to an infection. We experimentally tested if high circulating cytokine levels might increase vascular permeability-a critical hallmark of the disease-and if this phenomenon can be reversed by therapeutic cytokine removal (CytoSorb®) in an exemplary patient...
2017: Journal of Intensive Care
https://www.readbyqxmd.com/read/28105848/simplifying-nanowire-hall-effect-characterization-by-using-a-three-probe-device-design
#8
Olof Hultin, Gaute Otnes, Lars Samuelson, Kristian Storm
Electrical characterization of nanowires is a time-consuming and challenging task due to the complexity of single nanowire device fabrication and the difficulty in interpreting the measurements. We present a method to measure Hall effect in nanowires using a three-probe device that is simpler to fabricate than previous four-probe nanowire Hall devices and allows characterization of nanowires with smaller diameter. Extraction of charge carrier concentration from the three-probe measurements using an analytical model is discussed and compared to simulations...
January 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28100348/-right-coronary-artery-spasm-induced-acute-inferior-wall-myocardial-infarction-complicating-electrical-storm-a-case-report
#9
J Liang, Y J Zhou, H Y Han
No abstract text is available yet for this article.
January 25, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28069274/extended-bipolar-left-ventricular-pacing-as-a-possible-therapy-for-late-electrical-storm-induced-by-cardiac-resynchronization-therapy
#10
Dimitrios Asvestas, Richard Balasubramaniam, Mark Sopher, John Paisey, Girish G Babu
Although cardiac resynchronization therapy (CRT) has become a well-established treatment option for patients with drug-refractory severe systolic heart failure, there has been some evidence of adverse proarrhythmic events. We report a case of a patient with ischemic cardiomyopathy who underwent CRT with a defibrillator for primary prevention of sudden cardiac death. Two years after the implantation, the patient presented with electrical storm, which was completely terminated by modifying the left ventricular (LV) pacing configuration from true to extended bipolar LV pacing...
December 30, 2016: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28031851/a-good-excuse-for-skipping-the-test-electrical-storm-in-a-teenager
#11
Patrícia Rodrigues, António Pinheiro-Vieira, Marília Loureiro, Sílvia Álvares, Diana Anjo, Carla Roque, Maria João Sousa, Severo Torres
We describe the case of a teenager with a structurally normal heart that presented with torsades de pointes and cardiac arrest. He had a history of epilepsy in childhood, mild cognitive impairment and cognitive visual dysfunction. The baseline electrocardiogram had prominent J waves and a marked early repolarization pattern in all the leads, with normal QT interval. We discuss the differential diagnosis for this interesting case, as well as the patient's management.
December 2016: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28024555/innovative-approaches-to-arrhythmic-storm-the-growing-role-of-interventional-procedures
#12
REVIEW
Lena Rivard, Jason Andrade
Arrhythmic or electrical storm (AES) is a clinical condition characterized by 3 or more sustained ventricular arrhythmia episodes leading to appropriate device therapy in a 24-hour period and is associated with very high mortality. The clinical presentation is dramatic, and the management remains challenging. Although pharmacologic treatment and sedation are still part of the initial treatment, newer approaches that include ablation (endocardial, epicardial, or alternative procedures), sympathetic blockade (pharmacologic or by interventional sympathetic denervation), and mechanical hemodynamic support are used increasingly in this setting...
January 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28019045/autonomic-modulation-for-the-treatment-of-ventricular-arrhythmias-therapeutic-use-of-percutaneous-stellate-ganglion-blocks
#13
Marat Fudim, Richard Boortz-Marx, Chetan B Patel, Albert Y Sun, Jonathan P Piccini
Ventricular tachycardia (VT), ventricular fibrillation (VF) and electrical storm are commonly encountered emergency conditions in cardiac and surgical intensive care units. In most cases, recurrent ventricular arrhythmias or electrical storm are associated with a heightened sympathetic tone. These arrhythmias can be difficult to treat and may be refractory to beta-blockade, antiarrhythmic therapy, sedation, and mechanical hemodynamic support. While monomorphic ventricular tachycardia and PVC-triggered polymorphic ventricular tachycardia may sometimes be amenable to successful ablation, some patients may be too critically ill to make such an approach feasible...
December 26, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28012204/thorax-percutaneous-approach-for-epicardial-ventricular-ablation-in-a-patient-with-electrical-storm
#14
Gaetano Barbato, Valeria Carinci, Sergio Fortiparri, Piercamillo Pavesi, Francesco Pergolini, Giuseppe DI Pasquale
Subxiphoid puncture is considered the standard approach for epicardial ablation of ventricular arrhythmia but in some cases this access is impracticable due to the patient's anatomy. We describe the case of a patient with electrical storm and abnormal subdiaframmatic anatomy that precluded the usual subxiphoid approach. In this patient the pericardial space was gained through a direct thorax puncture at the fifth intercostals space close to the mammary line. The tools and technique utilized in this case were similar to what is usually used for traditional subxiphoid puncture...
December 24, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28007361/a-perfect-storm-tyrosine-kinase-inhibitor-associated-polymorphic-ventricular-tachycardia
#15
Alexander Beyer, Beejal Ganti, Allen Majkrzak, Nik Theyyunni
BACKGROUND: Oral tyrosine kinase inhibitors (TKIs) are becoming increasingly common in oncology practice due to ease of administration and patient preference. This class of medications is relatively unknown to emergency physicians. CASE REPORT: Here we present a case of electrical storm (ES) thought to be associated with ibrutinib, a TKI. The ES was unabated despite antidysrhythmic therapy and electrical cardioversion, and was treated with supportive care, which eventually included the use of extracorporeal membrane oxygenation...
December 19, 2016: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27932426/extracorporeal-membrane-oxygenation-for-hemodynamic-support-of-ventricular-tachycardia-ablation
#16
Francesca Baratto, Federico Pappalardo, Teresa Oloriz, Caterina Bisceglia, Pasquale Vergara, John Silberbauer, Nicolò Albanese, Manuela Cireddu, Giuseppe D'Angelo, Ambra Licia Di Prima, Fabrizio Monaco, Gabriele Paglino, Andrea Radinovic, Damiano Regazzoli, Simona Silvetti, Nicola Trevisi, Alberto Zangrillo, Paolo Della Bella
BACKGROUND: We report the experience in a cohort of consecutive patients receiving extracorporeal membrane oxygenation during catheter ablation of unstable ventricular tachycardia (VT) at our center. METHODS AND RESULTS: From 2010 to 2015, extracorporeal membrane oxygenation was initiated in 64 patients (average age: 63±15 years; left ventricular ejection fraction in 27±9%; cardiogenic shock in 23%, and electrical storm in 62% of patients) undergoing 74 unstable VT catheter ablation procedures...
December 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27885616/phytoplankton-dynamics-of-a-subtropical-reservoir-controlled-by-the-complex-interplay-among-hydrological-abiotic-and-biotic-variables
#17
Yi-Ming Kuo, Jiunn-Tzong Wu
This study was conducted to identify the key factors related to the spatiotemporal variations in phytoplankton abundance in a subtropical reservoir from 2006 to 2010 and to assist in developing strategies for water quality management. Dynamic factor analysis (DFA), a dimension-reduction technique, was used to identify interactions between explanatory variables (i.e., environmental variables) and abundance (biovolume) of predominant phytoplankton classes. The optimal DFA model significantly described the dynamic changes in abundances of predominant phytoplankton groups (including dinoflagellates, diatoms, and green algae) at five monitoring sites...
December 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27867801/ram-scb-simulations-of-electron-transport-and-plasma-wave-scattering-during-the-october-2012-double-dip-storm
#18
V K Jordanova, W Tu, Y Chen, S K Morley, A-D Panaitescu, G D Reeves, C A Kletzing
Mechanisms for electron injection, trapping, and loss in the near-Earth space environment are investigated during the October 2012 "double-dip" storm using our ring current-atmosphere interactions model with self-consistent magnetic field (RAM-SCB). Pitch angle and energy scattering are included for the first time in RAM-SCB using L and magnetic local time (MLT)-dependent event-specific chorus wave models inferred from NOAA Polar-orbiting Operational Environmental Satellites (POES) and Van Allen Probes Electric and Magnetic Field Instrument Suite and Integrated Science observations...
September 2016: Journal of Geophysical Research. Space Physics
https://www.readbyqxmd.com/read/27833686/first-report-of-survival-in-refractory-ventricular-fibrillation-after-dual-axis-defibrillation-and-esmolol-administration
#19
Kevin M Boehm, Daniel C Keyes, Laura E Mader, J Michelle Moccia
There is a subset of patients who suffer a witnessed ventricular fibrillation (VF) arrest and despite receiving reasonable care with medications (epinephrine and amiodarone) and multiple defibrillations (3+ attempts at 200 joules of biphasic current) remain in refractory VF (RVF), also known as electrical storm. The mortality for these patients is as high as 97%. We present the case of a patient who, with a novel approach, survived RVF to outpatient follow up.
November 2016: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27751294/electrical-storm-in-dilated-cardiomyopathy-treated-using-epicardial-radiofrequency-ablation-as-a-first-line-therapy
#20
Massimiliano Faustino, Tullio Agricola, Borejda Xyheri, Enrico Di Girolamo, Luigi Leonzio, Carmine Pizzi
We report a patient with non-ischemic dilated cardiomyopathy and low left ventricular systolic function (28%) presenting with an electrical storm originated in epicardial scar and ablated by radiofrequency. This case report suggests that a strategy of epicardial catheter ablation is reasonable for the patient presenting with electrical storm related to structural disease with a low left ventricular ejection fraction.
September 2016: Indian Heart Journal
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