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fibrosis amiodarone

Dorothy D Whelchel, Brett S Tennent-Brown, Amanda E Coleman, Gregg S Rapoport, Uriel Blas-Machado, Herbert W Maisenbacher, Brenton C Credille, Steeve Giguère
OBJECTIVE: To describe the treatment of persistent supraventricular tachycardia (SVT) in a young horse in endurance training. CASE SUMMARY: A 6-year-old Arab gelding in endurance training presented for a dysrhythmia and decreased performance. SVT was diagnosed and conversion to a normal sinus rhythm was achieved following administration of a constant rate infusion of amiodarone. However, reversion to SVT occurred shortly after initiation of ridden exercise. A second attempt to convert the dysrhythmia with amiodarone failed, but normal sinus rhythm was achieved with transvenous electrical cardioversion (TVEC)...
March 7, 2017: Journal of Veterinary Emergency and Critical Care
Christopher A Rajkumar, Norman Qureshi, Fu Siong Ng, Vasileios F Panoulas, Phang Boon Lim
BACKGROUND: Adenosine is the first-line pharmacotherapy for termination of supraventricular tachycardia through its action on the atrioventricular node. However, pro-arrhythmic effects of adenosine are also recognised, most notably in the presence of pre-excited atrial fibrillation. In this case report, we describe the induction of ventricular fibrillation in a patient with no demonstrable accessory pathway, nor any other structural heart disease. This rare, idiosyncratic reaction has never previously been reported and is of relevance given the widespread and routine use of adenosine in clinical practice...
January 22, 2017: Journal of Medical Case Reports
Sayoko Kinoshita, Tomohiro Hayashi, Kyoichi Wada, Mikie Yamato, Takeshi Kuwahara, Toshihisa Anzai, Mai Fujimoto, Kouichi Hosomi, Mitsutaka Takada
BACKGROUND: Amiodarone is associated with a number of significant adverse effects, including elevated transaminase levels, pulmonary fibrosis, arrhythmia, and thyroid dysfunction. Although thyroid dysfunction is considered to be a common and potentially serious adverse effect of amiodarone therapy, the exact pathogenesis remains unknown because of its complex manifestations. Therefore, the prevalence of, and risk factors for, amiodarone-induced thyroid dysfunction in Japanese patients were investigated in the present study...
December 2016: Journal of Arrhythmia
R He, X Du, S W Liu, L J Sun, Y Li, H Zeng, Y Y Li, C Sun, Y Zhang, C S Ma, W Gao
Objective: To investigate the current status of antiarrhythmic drugs (AADs) use in Chinese patients with atrial fibrillation(AF) and assess the safety of AADs in this patient cohort. Methods: From January 2011 to December 2013, a total of 4 008 AF patients treated with AADs was enrolled in this study and patients were followed up for 24 months. Detailed information of prescribed drug, the causes of drug discontinuation and side effects were recorded. Results: Amiodarone was prescribed to 64.3%(2 579 cases) and propafenone to 31...
November 24, 2016: Zhonghua Xin Xue Guan Bing za Zhi
Alexander J Sweidan, Navneet K Singh, Natasha Dang, Vinh Lam, Jyoti Datta
INTRODUCTION: Amiodarone is often used in the suppression of tachyarrhythmias. One of the more serious adverse effects includes amiodarone pulmonary toxicity (APT). Several pulmonary diseases can manifest including interstitial pneumonitis, organizing pneumonia, acute respiratory distress syndrome, diffuse alveolar hemorrhage, pulmonary nodules or masses, and pleural effusion. Incidence of APT varies from 5-15% and is correlated to dosage, age of the patient, and preexisting lung disease...
2016: Clinical Medicine Insights. Case Reports
Bhaskar Nandi, R Ajay Handa, K S Brar, Umar Nazir Kabli
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
Anastasia Zagorianou, Meletios Marougkas, Stavros G Drakos, Nikolaos Diakos, Panagiotis Konstantopoulos, Despina N Perrea, Maria Anastasiou-Nana, Konstantinos Malliaras
Amiodarone is effective in suppressing arrhythmias in heart failure patients. We investigated the effect of long-term amiodarone administration on myocardial fibrosis and left ventricular (LV) remodeling in a porcine model of ischemic cardiomyopathy. Eighteen infarcted farm pigs were randomized to receive long-term amiodarone administration for 3 months (n = 9) or conventional follow-up (n = 9). Evolution of LV remodeling over 3 months post-myocardial infarction was examined at tissue level (myocyte size, myocardial fibrosis and vascular density assessed by whole-field digital histopathology), organ level (LV structure and function assessed by echocardiography), and systemic level (BNP and MMP-9 levels)...
2016: SpringerPlus
Poornima Mahavadi, Lars Knudsen, Shalini Venkatesan, Ingrid Henneke, Jan Hegermann, Christoph Wrede, Matthias Ochs, Saket Ahuja, Shashi Chillappagari, Clemens Ruppert, Werner Seeger, Martina Korfei, Andreas Guenther
Amiodarone (AD) is an iodinated benzofuran derivative, especially known for its antiarrhythmic properties. It exerts serious side-effects even in patients receiving low doses. AD is well-known to induce apoptosis of type II alveolar epithelial cells (AECII), a mechanism that has been suggested to play an important role in AD-induced lung fibrosis. The precise molecular mechanisms underlying this disease are, however, still unclear. Because of its amphiphilic nature, AD becomes enriched in the lysosomal compartments, affecting the general functions of these organelles...
October 2015: Journal of Pathology. Clinical Research
Yuichi Hori, Shiro Nakahara, Sohtaro Mine, Naofumi Anjo, Akiko Fujii, Yoshihiko Ueda, Isao Taguchi
A 65-year-old man with non-ischemic cardiomyopathy, underwent an autopsy 2 months after the successful ablation of a sustained left ventricular (LV) summit ventricular tachycardia (VT). The patient died due to interstitial pneumonia from amiodarone use. The earliest activation sites of the VT were documented from both inside the anterior interventricular vein (AIV) and epicardial surface. The diameter of the AIV was 3-4 mm, and the radiofrequency (RF) lesion inside the AIV was a slight lesion due to high impedance with a high temperature...
December 2016: Heart and Vessels
Elizabeth R Magden, Meg M Sleeper, Stephanie J Buchl, Rebekah A Jones, Erica J Thiele, Gregory K Wilkerson
Cardiovascular disease is a leading cause of death in captive chimpanzees and is often associated with myocardial fibrosis, which increases the risk of cardiac arrhythmias. In this case report, we present a 36-y-old male chimpanzee (Pan troglodytes) diagnosed with frequent ventricular premature complexes (VPC). We placed a subcutaneous implantable loop recorder for continual ECG monitoring to assess his arrhythmias without the confounding effects of anesthetics. During his initial treatment with the antiarrhythmia medication amiodarone, he developed thrombocytopenia, and the drug was discontinued...
February 2016: Comparative Medicine
Erik Robinson, Sunjay Kaushal, Justice Alaboson, Sudhish Sharma, Amogh Belagodu, Claire Watkins, Brandon Walker, Gregory Webster, Patrick McCarthy, Dean Ho
Suppressing perioperative inflammation and post-operative atrial fibrillation requires effective drug delivery platforms (DDP). Localized anti-inflammatory and anti-arrhythmic agent release may be more effective than intravenous treatment to improve patient outcomes. This study utilized a dexamethasone (DEX) and amiodarone (AMIO)-loaded Parylene-C (PPX) nano-structured film to inhibit inflammation and atrial fibrillation. The PPX film was tested in an established pericardial adhesion rabbit model. Following sternotomy, the anterior pericardium was resected and the epicardium was abraded...
February 21, 2016: Nanoscale
Abeer A I Sharaf El-Din, Omaima M Abd Allah
Amiodarone (AD) is one of the most frequently prescribed anti-arrhythmic agents worldwide, but its effectiveness is limited due to the development of pulmonary toxicity. Several lines of evidence have suggested that AT1 receptor antagonists can attenuate pulmonary fibrosis in different animal models. This study was performed to evaluate the effect of olmesartan medoxomil (OM) on lung injury induced in rats by AD which was assessed biochemically (hydroxyproline content, MDA level and SOD activity), histologically (Ashcroft criteria and Masson's trichrome stain) and immunohistochemically (TGF-β1 expression in lung tissue)...
July 2016: Basic & Clinical Pharmacology & Toxicology
Hamid-Reza Nasri, Siyavash Joukar, Hamid Kheradmand, Hamid-Reza Poursalehi, Shahriar Dabiri
OBJECTIVE: The purpose of this study was to evaluate the effect of atorvastatin administration on amiodarone-induced pulmonary fibrosis in rats. MATERIALS AND METHODS: Thirty-six male Wistar rats were randomly divided into 4 groups. The control group (CTL) received distilled water (0.3 ml intratracheally on days 0 and 2 and 0.5 ml orally from day 0 for 3 weeks). The atorvastatin group (AT), in addition to intratracheal distilled water, received 1 mg/kg of atorvastatin orally from day 0 for 3 weeks...
2016: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
Aashish Sharma, Marco Sartori, Jose J Zaragoza, Gianluca Villa, Renhua Lu, Elena Faggiana, Alessandra Brocca, Luca Di Lullo, Sandro Feriozzi, Claudio Ronco
Cardiorenal syndrome type 5 (CRS-5) includes conditions where there is a simultaneous involvement of the heart and kidney from a systemic disorder. This is a bilateral organ cross talk. Fabry's disease (FD) is a devastating progressive inborn error of metabolism with lysosomal glycosphingolipid deposition in variety of cell types, capillary endothelial cells, renal, cardiac and nerve cells. Basic effect is absent or deficient activity of lysosomal exoglycohydrolase a-galactosidase A. Renal involvement consists of proteinuria, isosthenuria, altered tubular function, presenting in second or third decade leading to azotemia and end-stage renal disease in third to fifth decade mainly due to irreversible changes to glomerular, tubular and vascular structures, especially highlighted by podocytes foot process effacement...
November 2015: Heart Failure Reviews
Jonathan Buggey, Matthew Kappus, Anand S Lagoo, Carla W Brady
We present a case report of an 80-year-old woman with volume overload thought initially to be secondary to heart failure, but determined to be amiodarone-induced acute and chronic liver injury leading to submassive necrosis and bridging fibrosis consistent with early cirrhosis. Her histopathology was uniquely absent of steatosis and phospholipidosis, which are commonly seen in AIC.
January 2015: ACG Case Reports Journal
Bastian Birkelbach, Dennis Lutz, Clemens Ruppert, Ingrid Henneke, Elena Lopez-Rodriguez, Andreas Günther, Matthias Ochs, Poornima Mahavadi, Lars Knudsen
Chronic injury of alveolar epithelial type II cells (AE2 cells) represents a key event in the development of lung fibrosis in animal models and in humans, such as idiopathic pulmonary fibrosis (IPF). Intratracheal delivery of amiodarone to mice results in a profound injury and macroautophagy-dependent apoptosis of AE2 cells. Increased autophagy manifested in AE2 cells by disturbances of the intracellular surfactant. Hence, we hypothesized that ultrastructural alterations of the intracellular surfactant pool are signs of epithelial stress correlating with the severity of fibrotic remodeling...
July 1, 2015: American Journal of Physiology. Lung Cellular and Molecular Physiology
Manoj Thangam, Sriram Nathan, Marija Petrovica, Biswajit Kar, Manish Patel, Pranav Loyalka, L Maximilian Buja, Igor D Gregoric
A 33-year-old African-American woman was bridged to heart transplantation with a left ventricular assist device. She had a 14-month history of heart failure secondary to viral cardiomyopathy. The patient's refractory ventricular tachycardia was treated with intravenous procainamide owing to the patient's history of amiodarone-induced thyroiditis. After orthotopic cardiac transplant, she experienced prolonged respiratory failure. Serial computed tomography evaluation of the lung revealed diffuse bilateral ground-glass opacities and septal thickening...
July 2015: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
In Sook Kang, Kyung Jin Kim, Yookyung Kim, Seong-Hoon Park
BACKGROUND/AIMS: Amiodarone is one of the most widely used antiarrhythmic agents; however, amiodarone-induced pulmonary toxicity (APT) can be irreversible and sometimes fatal. The aim of this study was to evaluate the feasibility of chest computed tomography (CT) as a diagnostic tool for APT and to assess the utility of the CT APT score as an index for predicting the severity of APT. METHODS: Patients underwent amiodarone treatment for various reasons, most often atrial fibrillation, for more than 2 years, and those that received a cumulative dose > 100 g were enrolled...
November 2014: Korean Journal of Internal Medicine
Philippe Bonniaud, Marjolaine Georges, Nicolas Favrolt, Philippe Camus
Drug-induced infiltrative lung disease may manifest as variable clinical radiological patterns, including subacute or chronic interstitial pneumonia, pulmonary fibrosis, eosinophilic pneumonia, organising pneumonia, pulmonary edema, or sarcoidosis. A large amount of drugs have been incriminated, including those used in cardiovascular diseases (amiodarone, statins and angiotensin converting enzyme inhibitors), antibiotics (minocycline, nitrofurantoin), most of anticancer drugs (and especially chemotherapy and chest radiation), treatment of rheumatoid arthritis, as well as more recent drugs...
September 2014: La Revue du Praticien
S S Sirsikar, S M Ranpise, A S Patil, K Y Deodhar
Pulmonary opacities have many causes we are presenting a case of pulmonary opacity in a patient of breathlessness; who was on amiodarone for atrial fibrillation (AF).
April 2014: Journal of the Association of Physicians of India
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