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https://www.readbyqxmd.com/read/28627809/ivabradine-reduces-digitalis-induced-ventricular-arrhythmias
#1
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/28591151/cardiac-glycosides-use-and-the-risk-and-mortality-of-cancer-systematic-review-and-meta-analysis-of-observational-studies
#2
Mohamed Hosny Osman, Eman Farrag, Mai Selim, Mohamed Samy Osman, Arwa Hasanine, Azza Selim
BACKGROUND: Cardiac glycosides (CGs) including digitalis, digoxin and digitoxin are used in the treatment of congestive heart failure and atrial fibrillation. Pre-clinical studies have investigated the anti-neoplastic properties of CGs since 1960s. Epidemiological studies concerning the association between CGs use and cancer risk yielded inconsistent results. We have performed a systematic review and meta-analysis to summarize the effects of CGs on cancer risk and mortality. METHODS: PubMed, Scopus, Cochrane library, Medline and Web of Knowledge were searched for identifying relevant studies...
2017: PloS One
https://www.readbyqxmd.com/read/28561136/the-foxgloves-digitalis-revisited
#3
Wolfgang Kreis
This review provides a renewed look at the genus Digitalis. Emphasis will be put on those issues that attracted the most attention or even went through paradigmatic changes since the turn of the millennium. PubMed and Google Scholar were used ("Digitalis" and "Foxglove" were the key words) to identify research from 2000 till 2017 containing data relevant enough to be presented here. Intriguing new results emerged from studies related to the phylogeny and taxonomy of the genus as well as to the biosynthesis and potential medicinal uses of the key active compounds, the cardiac glycosides...
May 23, 2017: Planta Medica
https://www.readbyqxmd.com/read/28501522/long-term-effects-of-flosequinan-on-the-morbidity-and-mortality-of-patients-with-severe-chronic-heart-failure-primary-results-of-the-profile-trial-after-24-years
#4
Milton Packer, Bertram Pitt, Jean-Lucien Rouleau, Karl Swedberg, David L DeMets, Lloyd Fisher
OBJECTIVES: The objective of this clinical trial was to evaluate the long-term effects of flosequinan on the morbidity and mortality of patients with severe chronic heart failure. BACKGROUND: Flosequinan was the first oral vasodilator to be used in the clinic to augment the effects of digitalis, diuretics, and angiotensin-converting enzyme inhibitors in heart failure. However, the drug activated neurohormonal systems and exerted both positive inotropic and chronotropic effects, raising concerns about its safety during long-term use...
May 2, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28486743/production-of-the-cytotoxic-cardenolide-glucoevatromonoside-by-semisynthesis-and-biotransformation-of-evatromonoside-by-a-digitalis-lanata-cell-culture
#5
Jennifer Munkert, Marina Santiago Franco, Elke Nolte, Izabella Thaís Silva, Rachel Oliveira Castilho, Flaviano Melo Ottoni, Naira F Z Schneider, Mônica C Oliveira, Helge Taubert, Walter Bauer, Saulo F Andrade, Ricardo J Alves, Cláudia M O Simões, Fernão C Braga, Wolfgang Kreis, Rodrigo Maia de Pádua
Recent studies demonstrate that cardiac glycosides, known to inhibit Na(+)/K(+)-ATPase in humans, have increased susceptibility to cancer cells that can be used in tumor therapy. One of the most promising candidates identified so far is glucoevatromonoside, which can be isolated from the endangered species Digitalis mariana ssp. heywoodii. Due to its complex structure, glucoevatromonoside cannot be obtained economically by total chemical synthesis. Here we describe two methods for glucoevatromonoside production, both using evatromonoside obtained by chemical degradation of digitoxin as the precursor...
May 9, 2017: Planta Medica
https://www.readbyqxmd.com/read/28463019/fatal-cardiac-glycoside-poisoning-due-to-mistaking-foxglove-for-comfrey
#6
I-Lin Wu, Jiun-Hao Yu, Chih-Chuan Lin, Chen-June Seak, Kent R Olson, Hsien-Yi Chen
CONTEXT: Accidental ingestion of foxglove (Digitalis purpurea) can cause significant cardiac toxicity. We report a patient who ingested foxglove mistaking it for comfrey and developed refractory ventricular arrhythmias. The patient died despite treatment with digoxin-specific antibody fragments (DSFab) and veno-arterial extracorporeal membrane oxygenation (VA-ECMO). CASE DETAILS: A 55-year-old woman presented to the emergency department with nausea, vomiting and generalized weakness eight hours after drinking "comfrey" tea...
May 2, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28455597/association-of-digitalis-treatment-with-outcomes-following-myocardial-infarction-in-patients-with-heart-failure-or-evidence-of-left-ventricular-dysfunction-an-analysis-from-the-high-risk-myocardial-infarction-database-initiative
#7
Stefano Coiro, Nicolas Girerd, Patrick Rossignol, Johann Bauersachs, Bertram Pitt, Renaud Fay, Giuseppe Ambrosio, Scott D Solomon, Kenneth Dickstein, Faiez Zannad
BACKGROUND: Contradictory findings have been reported regarding the safety and efficacy of digitalis in patients recovering from acute myocardial infarction (MI). We studied the association of digitalis use with long-term and short-term prognosis in patients presenting with an acute MI complicated with heart failure (HF), left ventricular dysfunction, or both. METHODS AND RESULTS: Using the High-Risk MI Database Initiative combining data from 4 major clinical trials, totaling 27,673 patients, we investigated the association between digitalis use at baseline (3093 patients with digitalis and 24,580 without) with the rate of all-cause death, sudden cardiac death, cardiovascular death, HF hospitalization and the combination of the latter two, over a mean follow-up time of 2...
April 28, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28423729/digitalis-use-and-risk-of-gastrointestinal-cancers-a-nationwide-population-based-cohort-study
#8
Shao-Hua Xie, Tomas Jernberg, Fredrik Mattsson, Jesper Lagergren
BACKGROUND: Gastrointestinal cancers are characterized by a male predominance, suggesting a role of sex hormones. We hypothesized that digitalis medication, due to its estrogenic properties, decreases the risk of male-predominated gastrointestinal cancers. RESULTS: Long -term digitalis use (≥2 years) was followed by decreased risk for several gastrointestinal cancers, but associations were statistically significant only for liver cancer (hazard ratio [HR]=0.40, 95% confidence interval (CI) 0...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28398365/-digitalis-a-drug-to-be-scrapped
#9
Franco Cosmi, Barbara Tarquini, Beatrice Mariottoni, Deborah Cosmi
We performed a comprehensive review of the scientific literature on the use of digoxin in heart failure and atrial fibrillation. In congestive heart failure (CHF) there is only one randomized trial with a statistical sample sufficiently large. In this trial (DIG trial), which enrolled patients with systolic left ventricular dysfunction in sinus rhythm, digoxin had a neutral action on mortality and modestly reduced the overall need of hospitalization. The study was conducted in the pre-beta-blocker era and, therefore, it has a doubtful application to the current clinical context...
February 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28387249/lanatoside-c-a-cardiac-glycoside-acts-through-protein-kinase-c%C3%AE-to-cause-apoptosis-of-human-hepatocellular-carcinoma-cells
#10
Min-Wu Chao, Tzu-Hsuan Chen, Han-Li Huang, Yu-Wei Chang, Wei-Chun HuangFu, Yu-Ching Lee, Che-Ming Teng, Shiow-Lin Pan
Recent studies have revealed that cardiac glycosides, such as digitalis and digoxin, have anticancer activity and may serve as lead compounds for the development of cancer treatments. The poor prognosis of hepatocellular carcinoma (HCC) patients reflects the development of resistance to current chemotherapeutic agents, highlighting the need for discovering new small-molecule therapeutics. Here, we found that lanatoside C, an anti-arrhythmic agent extracted from Digitalis lanata, inhibited the growth of HCC cells and dramatically decreased tumor volume as well as delayed tumor growth without obvious body weight loss...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28333465/disordering-effects-of-digitonin-on-phospholipid-monolayers
#11
M Orczyk, K Wojciechowski, G Brezesinski
Digitonin, a steroidal saponin obtained from the foxglove plant (Digitalis purpurea), displays a wide spectrum of biological properties and is often used as a model in mechanistic investigations of the biological activity of saponins. In the present study, Langmuir monolayers of zwitterionic (DPPC, DMPE, POPC, POPE, DSPC, DSPE, and DPPE) and ionic (DPPS and DPPG) phospholipids were employed in order to better understand the effect of digitonin on the lipid organization. For this purpose, a combination of surface pressure relaxation, infrared reflection absorption spectroscopy (IRRAS), and fluorescence microscopy measurements was used...
April 5, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28299402/comparative-analysis-of-three-drug-drug-interaction-screening-systems-against-probable-clinically-relevant-drug-drug-interactions-a-prospective-cohort-study
#12
Neža Muhič, Ales Mrhar, Miran Brvar
PURPOSE: Drug-drug interaction (DDI) screening systems report potential DDIs. This study aimed to find the prevalence of probable DDI-related adverse drug reactions (ADRs) and compare the clinical usefulness of different DDI screening systems to prevent or warn against these ADRs. METHODS: A prospective cohort study was conducted in patients urgently admitted to medical departments. Potential DDIs were checked using Complete Drug Interaction®, Lexicomp® Online™, and Drug Interaction Checker®...
March 15, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28242045/epidemiology-of-overdose-episodes-from-the-period-prior-to-hospitalization-for-drug-poisoning-until-discharge-in-japan-an-exploratory-descriptive-study-using-a-nationwide-claims-database
#13
Yasuyuki Okumura, Nobuo Sakata, Kunihiko Takahashi, Daisuke Nishi, Hisateru Tachimori
BACKGROUND: Little is known about the nationwide epidemiology of the annual rate, causative substance, and clinical course of overdose-related admission. We aimed to describe the epidemiology of overdose episodes from the period prior to hospitalization for drug poisoning until discharge to home. METHODS: We assessed all cases of admission due to overdose (21,663 episodes) in Japan from October 2012 through September 2013 using the National Database of Health Insurance Claims and Specific Health Checkups of Japan...
February 24, 2017: Journal of Epidemiology
https://www.readbyqxmd.com/read/28130772/digitalis-use-and-the-risk-of-breast-cancer-a-systematic-review-and-meta-analysis
#14
REVIEW
Chen Zhang, Shao-Hua Xie, Bingfei Xu, Shi Lu, Pian Liu
INTRODUCTION: Previous epidemiological studies have indicated an increased risk of breast cancer associated with digitalis medication, though results are inconsistent. We performed this systematic review of available epidemiological studies to clarify the association between digitalis use and the risk of breast cancer. METHODS: A search of studies published through May 2016 in MEDLINE and EMBASE databases was performed, supplemented by manual searches of reference lists...
April 2017: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/28112707/in-the-kingdom-of-tortelli-ravioli-like-pasta-plant-poisoning-is-still-a-threat-a-case-report-of-near-fatal-poisoning-from-digitalis-purpurea-accidentally-confused-with-borago-officinalis
#15
Laura Bonfanti, Giuseppe Lippi, Irene Ciullo, Fiorenza Robuschi, Rosalia Aloe, Sara Tarasconi, Riccardo Vassallo, Gianfranco Cervellin
A 58 years healthy old woman was admitted to the Emergency Department (ED) with cardiac arrest due to ventricular fibrillation (VF). Appropriate cardiopulmonary resuscitation (CPR), multiple DC shocks and oro-tracheal intubation (OTI) were effective to induce recovery of spontaneous circulation (ROSC). After ROSC was achieved, the electrocardiogram (ECG) showed an idio-ventricular rhythm with atrioventricular dissociation. A transcutaneous pacing was hence applied and the patient was administered with isoproterenol...
January 16, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28094454/boosting-the-reserves-additive-regulation-of-cardiac-repolarisation
#16
Adam P Hill
No abstract text is available yet for this article.
April 1, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/27975778/cytotoxicity-comparison-on-different-parts-of-three-digitalis-species-and-isolation-of-potential-bioactive-compounds
#17
V M Kutluay, M Inoue, U S Harput, I Saracoglu
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27908913/comfrey-herbal-remedy-causing-second-degree-heart-block-do-not-be-outfoxed-by-digitalis
#18
Mathew Kurian Vithayathil, Matthew Edwards
A previously well woman aged 63 years presents to the emergency department with vomiting, palpitations and 3 presyncopal episodes. She had no previous medical or cardiac history, with the patient stating that she tried a herbal remedy of boiled comfrey leaves for insomnia 18 hours before arrival to the department. Her ECG showed multiple abnormalities, including bradycardia, second-degree atrioventricular node block, Mobitz Type 2, a shortened QT interval, downsloping ST depression and presence of U waves...
December 1, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27878411/reckless-administration-of-qt-interval-prolonging-agents-in-elderly-patients-with-drug-induced-torsade-de-pointes
#19
Galia Jackobson, Narin Nard Carmel, Dor Lotan, Anjelika Kremer, Dan Justo
A systematic review was conducted for all published case reports on drug-induced torsade de pointes (TdP) in elderly (≥80 years) patients to study if the administration of the offending agent was reckless. Overall, 61 reports on drug-induced TdP in patients aged 80-97 years were included in the analysis. Non-modifiable risk factors for drug-induced TdP (e.g. acute coronary syndrome, female gender and congestive heart failure), modifiable risk factors (e.g. hypokalemia, severe hypomagnesemia and digitalis toxicity) and reckless administration of a QT interval-prolonging agent (e...
November 22, 2016: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/27863364/interactions-of-digitalis-and-class-iii-antiarrhythmic-drugs-amiodarone-versus-dronedarone
#20
Gerrit Frommeyer, Dirk Puckhaber, Christian Ellermann, Dirk G Dechering, Simon Kochhäuser, Patrick Leitz, Florian Reinke, Lars Eckardt
BACKGROUND: A post hoc analysis of the PALLAS trial suggested possible interactions of dronedarone and digitalis glycosides. The aim of the present study was to compare the effects dronedarone or amiodarone in combination with digitalis glycosides. METHODS AND RESULTS: Eleven female rabbits underwent chronic oral treatment with amiodarone (50mg/kg/d for 6weeks). Ten rabbits were treated with dronedarone (50mg/kg/d for 6weeks). Ten rabbits were used as controls. Hearts were isolated and Langendorff-perfused...
February 1, 2017: International Journal of Cardiology
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