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https://www.readbyqxmd.com/read/29284111/digoxin-benefit-varies-by-risk-of-heart-failure-hospitalization-applying-the-tufts-mc-hf-risk-model
#1
Jenica N Upshaw, David van Klaveren, Marvin A Konstam, David M Kent
BACKGROUND: Digoxin has been shown to reduce heart failure hospitalizations with a neutral effect on mortality. It is unknown whether there is heterogeneity of treatment effect for digitalis therapy according to predicted risk of heart failure hospitalization. METHODS AND RESULTS: We conducted a post hoc analysis of the Digitalis Investigator Group (DIG) studies, randomized controlled trials of digoxin versus placebo in participants with heart failure and left ventricular ejection fraction less than or equal to 45% (main DIG study, n=6800) or >45% (ancillary DIG study, n=988)...
December 25, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/29251320/mechanism-of-endogenous-digitalis-like-factor%C3%A2-induced-vascular-endothelial-cell-damage-in-patients-with-severe-preeclampsia
#2
Mei Peng, Mengyuan Yang, Yiling Ding, Ling Yu, Yali Deng, Weisi Lai, Yun Hu
Although endogenous digitalis‑like factor (EDLF) is associated with the development of various physical disorders, the role in preeclampsia remains unclear. This study investigated the effects of EDLF on vascular endothelial cell damage in patients with preeclampsia and the potential mechanisms. From July 2014 to July 2015, 120 singleton pregnancy cases underwent a prenatal examination, inpatient delivery and had normal blood pressure were included in the study, either as patients with severe preeclampsia or the control patients...
February 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29246935/cocaine-induced-pseudo-wellens-syndrome-a-wellens-phenocopy
#3
Aung Naing Lin, Sithu Lin, Rahul Gokhroo, Deepika Misra
Wellens' syndrome represents critical occlusion of the proximal left anterior descending coronary artery. Electrocardiographic changes similar to Wellens' wave are not exceptional to acute coronary occlusion and can also be seen in cardiac and non-cardiac conditions, such as left ventricular hypertrophy, persistent juvenile T wave, bundle branch blocks, cerebral haemorrhage, pulmonary oedema, pulmonary embolism, pheochromocytoma, Takotsubo syndrome, digitalis and cocaine-induced coronary vasospasm. Cocaine-induced pseudo-Wellens' syndrome should be considered as one of the differentials, since cocaine is used frequently by young adults and can cause left anterior descending coronary vasospasm mimicking Wellens' syndrome...
December 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29242405/digitalis-like-compounds-restore-hnis-expression-and-iodide-uptake-capacity-in-anaplastic-thyroid-cancer
#4
Marika H Tesselaar, Thomas Crezee, Imke Schuurmans, Danny Gerrits, James Nagarajah, Otto C Boerman, Ilse van Engen-van Grunsven, Johannes W A Smit, Romana T Netea-Maier, Theo S Plantinga
Purpose: Anaplastic thyroid cancer (ATC) is a rare malignancy that accounts for 1-2% of all thyroid cancers. ATC is one of the most aggressive human cancers, with rapid growth, tumor invasion and development of distant metastases. The median survival is only 5 months and the 1-year survival is less than 20%. Moreover, as a result of severe dedifferentiation including the loss of human sodium iodide symporter (hNIS) expression, radioactive iodide (RAI) therapy is ineffective. Recently, we have demonstrated beneficial effects of autophagy activating digitalis-like compounds (DLCs) on redifferentiation and concomitant restoration of iodide uptake in RAI-refractory papillary and follicular thyroid cancer cell lines...
December 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29169900/cardiotonic-actions-of-quercetin-and-its-metabolite-tamarixetin-through-a-digitalis-like-enhancement-of-ca-2-transients
#5
Kengo Hayamizu, Sachio Morimoto, Miki Nonaka, Sumio Hoka, Toshiyuki Sasaguri
The plant-derived flavonoid, quercetin (QCT), has many biological actions, including cardioprotective actions, resulting from its antioxidant and anti-inflammatory effects. In this study, effects of QCT and its metabolites on the contraction and Ca(2+) transients (CaT) of mouse single cardiomyocytes were simultaneously measured and compared with those of isoproterenol and digoxin. Furthermore, cardiac function and plasma concentrations were analyzed after bolus intravenous administration of QCT in mice. QCT and its metabolite, tamarixetin, as well as isoproterenol and digoxin, enhanced the contraction and CaT of cardiomyocytes...
November 20, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29169235/hypermagnesuria-in-humans-following-acute-intravenous-administration-of-digoxin
#6
Nabil Abu-Amer, Eldar Priel, Steven J.D. Karlish, Zvi Farfel, Haim Mayan
Background: Hypomagnesemia is a known predisposing condition for the appearance of digitalis toxicity. The detection of a genetic form of Mg urinary wasting with hypomagnesemia being caused by a mutation in the γ subunit (FXYD2) of the Na,K-ATPase, the pharmacological target of Digoxin, prompted us to investigate whether Digoxin administration increases urinary Mg excretion. Methods: Two groups of subjects, with rapid atrial fibrillation, received intravenous Digoxin (n = 9) or verapamil (n = 8), for heart rate control...
October 30, 2017: Nephron
https://www.readbyqxmd.com/read/29098378/control-of-cardiac-chronotropic-function-in-patients-after-heart-transplantation-effects-of-ivabradine-and-metoprolol-succinate-on-resting-heart-rate-in-the-denervated-heart
#7
Rasmus Rivinius, Matthias Helmschrott, Arjang Ruhparwar, Ann-Kathrin Rahm, Fabrice F Darche, Dierk Thomas, Tom Bruckner, Philipp Ehlermann, Hugo A Katus, Andreas O Doesch
BACKGROUND: Patients after heart transplantation (HTX) present with sinus tachycardia due to graft denervation. As elevated heart rates negatively affect survival, the aim of this study was to analyze the effects of ivabradine vs metoprolol succinate on heart rate, left ventricular (LV) mass and survival following HTX. METHODS: This observational retrospective single-center study assessed 84 patients continuously receiving either ivabradine (n = 40) or metoprolol succinate (n = 44) within 2 years after HTX...
November 2, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29075124/chronic-digitalis-therapy-in-patients-before-heart-transplantation-is-an-independent-risk-factor-for-increased-posttransplant-mortality
#8
Rasmus Rivinius, Matthias Helmschrott, Arjang Ruhparwar, Ann-Kathrin Rahm, Fabrice F Darche, Dierk Thomas, Tom Bruckner, Philipp Ehlermann, Hugo A Katus, Andreas O Doesch
OBJECTIVES: Digitalis therapy (digoxin or digitoxin) in patients with heart failure is subject to an ongoing debate. Recent data suggest an increased mortality in patients receiving digitalis. This study investigated the effects of chronic digitalis therapy prior to heart transplantation (HTX) on posttransplant outcomes. PATIENTS AND METHODS: This was a retrospective, observational, single-center study. It comprised 530 adult patients who were heart-transplanted at Heidelberg University Hospital between 1989 and 2012...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29052294/why-is-the-use-of-digitalis-withering-another-reason-that-we-need-medical-heart-failure-specialists
#9
Milton Packer
No abstract text is available yet for this article.
October 19, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28993930/in-search-of-a-standard-when-analyzing-medication-adherence-in-patients-with-heart-failure-using-claims-data-a-systematic-review
#10
REVIEW
Katrin Krueger, Nina Griese-Mammen, Ingrid Schubert, Marita Kieble, Lea Botermann, Ulrich Laufs, Charlotte Kloft, Martin Schulz
To determine and address medication non-adherence is important and may improve patient outcomes. Our aim was to perform a systematic review on the operationalization of adherence measures in patients with heart failure using claims data. We searched the MEDLINE, EMBASE, and Cochrane databases. A quality check of the full-text articles was performed using the Quality in Prognosis Studies tool. We included 28 studies. Eleven studies used the medication possession ratio, 15 the proportion of days covered, and six studies used own methods to calculate medication adherence...
October 9, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28960867/clinical-presentation-at-first-heart-failure-hospitalization-does-not-predict-recurrent-heart-failure-admission
#11
Annamaria Kosztin, Jason Costa, Arthur J Moss, Yitschak Biton, Vivien Klaudia Nagy, Scott D Solomon, Laszlo Geller, Scott McNitt, Bronislava Polonsky, Bela Merkely, Valentina Kutyifa
AIMS: There are limited data on whether clinical presentation at first heart failure (HF) hospitalization predicts recurrent HF events. We aimed to assess predictors of recurrent HF hospitalizations in mild HF patients with an implantable cardioverter defibrillator or cardiac resynchronization therapy with defibrillator. METHODS AND RESULTS: Data on HF hospitalizations were prospectively collected for patients enrolled in MADIT-CRT. Predictors of recurrent HF hospitalization (HF2) after the first HF hospitalization were assessed using Cox proportional hazards regression models including baseline covariates and clinical presentation or management at first HF hospitalization...
June 17, 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28855321/the-role-of-stochastic-thermal-environments-in-modulating-the-thermal-physiology-of-an-intertidal-limpet-lottia-digitalis
#12
Madeline J Drake, Nathan A Miller, Anne E Todgham
Much of our understanding of the thermal physiology of intertidal organisms comes from experiments with animals acclimated under constant conditions and exposed to a single heat stress. In nature, however, the thermal environment is more complex. Aerial exposure and the unpredictable nature of thermal stress during low tides may be critical factors in defining the thermal physiology of intertidal organisms. In the fingered limpet, Lottia digitalis, we investigated whether upper temperature tolerance and thermal sensitivity were influenced by the pattern of fluctuation with which thermal stress was applied...
September 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28782051/comparison-of-digitalis-sensitivities-of-na-k-atpases-from-human-and-pig-kidneys
#13
Marjorie E Gable, Linda Ellis, Olga V Fedorova, Alexei Y Bagrov, Amir Askari
Digitalis drugs are selective inhibitors of the plasma membrane Na(+)/K(+)-ATPase. There are many studies on molecular mechanisms of digitalis interaction with purified pig kidney enzyme, with the tacit assumption that it is a good model of human kidney enzyme. However, previous studies on crude or recombinant human kidney enzymes are limited, and have not resulted in consistent findings on their digitalis sensitivities. Hence, we prepared comparably purified enzymes from human and pig kidneys and determined inhibitory constants of digoxin, ouabain, ouabagenin, bufalin, and marinobufagenin (MBG) on enzyme activity under optimal turnover conditions...
July 31, 2017: ACS Omega
https://www.readbyqxmd.com/read/28748555/digitalis-use-and-lung-cancer-risk-by-histological-type-in-men
#14
Wentao Li, Shao-Hua Xie, Lap-Ah Tse, Jesper Lagergren
Lung cancer risk and tumor characteristics differ between sexes. Estrogen has been suggested to counteract lung cancer development. We aimed to test the hypothesis that digitalis use decreases lung cancer risk due to its estrogenic and other anticancer properties in men. This was a nationwide Swedish population-based cohort study between July 1, 2005 and December 31, 2013. Data on the use of digitalis and organic nitrates in all male individuals were derived from the Swedish Prescribed Drug Registry. New lung cancer diagnoses among cohort participants were identified from the Swedish Cancer Registry...
November 15, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28725632/medicinal-importance-pharmacological-activities-and-analytical-aspects-of-hispidulin-a-concise-report
#15
REVIEW
Kanika Patel, Dinesh Kumar Patel
Herbal medicines have been played an important role in the human civilization since very ancient time as a food, cloth, medicine and other aspects. Some of the important drugs in the modern medicine were derived from the natural sources such as aspirin, digitalis, quinine, vincristine, vinblastine etc. Hispidulin (4', 5, 7-trihydroxy-6-methoxyflavone) is a flavones derivative found in plant such as Grindelia argentina, Arrabidaea chica, Saussurea involucrate, Crossostephium chinense, Artemisia and Salvia species...
July 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/28688145/therapeutic-concentrations-of-digitoxin-inhibit-endothelial-focal-adhesion-kinase-and-angiogenesis-induced-by-different-growth-factors
#16
Annalisa Trenti, Elisabetta Zulato, Lorenza Pasqualini, Stefano Indraccolo, Chiara Bolego, Lucia Trevisi
BACKGROUND AND PURPOSE: Cardiac glycosides are Na(+) /K(+) -ATPases inhibitors used to treat congestive heart failure and cardiac arrhythmias. Epidemiological studies indicate that patients on digitalis therapy are more protected from cancer. Evidence of a selective cytotoxicity against cancer cells has suggested their potential use as anticancer drugs. The effect on angiogenesis of clinically used cardiac glycosides has not been extensively explored. EXPERIMENTAL APPROACH: We studied the effect of digoxin, digitoxin and ouabain on early events of the angiogenic process in HUVECs...
September 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28683704/pharmacokinetic-monitoring-of-chronic-treatment-with-digoxin-from-primary-health-care
#17
Emma M García-Iranzo, Francisco J Rodríguez-Lucena, Carmen Matoses-Chirivella, Ana García-Monsalve, Ana Cristina Murcia-López, Andrés Navarro-Ruiz
INTRODUCTION: The serum digoxin concentration (SDC) should be between 0.8 and 2 ng/ml. The objective is to assess the pharmacokinetic monitoring of SDC performed from primary healthcare (PH) in patients with chronic treatment. METHODS: Cross-sectional retrospective study of patients with chronic treatment with digoxin belonging to the department of a General University Hospital.Data were analized: age, sex, diagnosis, number of serum digoxin concentration determinations, date and origin of the request for monitoring, analytical result and pharmacokinetic assessment are collected...
July 1, 2017: Farmacia Hospitalaria
https://www.readbyqxmd.com/read/28682565/-digoxin-poisoning-new-prospects-for-therapy
#18
Alfonsina Marino, Lorenzo Giordano, Francesco Ardu
The filter has been approved by the Food and Drug Administration for the removal of beta-2 microglobulin in patient undergoing hemodialysis. We used the filter (the patient agrees) off label, in the course of digitalis intoxication and we have shown that the filter is capable of removing the drug effectively.
April 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28653148/-new-pharmacologic-therapies-for-chronic-heart-failure
#19
REVIEW
T Kempf, U Bavendiek, J Bauersachs
Heart failure is a disease with a high prevalence and incidence. New therapeutic approaches are needed to prevent the onset of heart failure and to reduce the high morbidity and mortality associated with this disease. An optimized therapy of arterial hypertension in patients with risk factors and the use of the SGLT2 inhibitor empagliflozin in type 2 diabetics are proven strategies to prevent heart failure. The therapeutic options in heart failure with preserved ejection fraction are still insufficient. In heart failure with reduced ejection fraction sacubitril/valsartan, the first approved angiotensin receptor-neprilysin inhibitor, is superior to an angiotensin converting enzyme (ACE) inhibitor...
June 26, 2017: Der Internist
https://www.readbyqxmd.com/read/28627809/ivabradine-reduces-digitalis-induced-ventricular-arrhythmias
#20
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 this 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 (0.2 μM). Monophasic action potentials and ECG showed a significant abbreviation of QT interval (-34 ms, p < 0...
December 2017: Basic & Clinical Pharmacology & Toxicology
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