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Author: J. Morganroth Publisher: Springer Science & Business Media ISBN: 9400982704 Category : Medical Languages : en Pages : 324
Book Description
Thus, there are now several chronic canine myocardial infarction ventricular tachyarrhythmia models which are available for the evaluation of new antiarrhythmic drugs (Table I). The available models fulfill many, but not all of the requirements for an ideal chronic arrhythmia model (Table 11). The sustained arrhythmias initiated in these models using programmed pacing presumably have the same localized reentrant mechanism that characterizes chronic human myocardial infarction and chronic coronary 26 artery disease. However, these models are not suitable for determining whether a new drug will abolish spontaneous ly-occurring PVCs. In addition, these models are of unproven value in the study of acute spontaneously occurring sudden death; although recently initiated, provocative work may shed further light on this subject. Most importantly, the available models do seem well-suited to the evaluation of new drugs intended for use in chronic coronary artery disease patients at risk for sustained reentrant ventricular tachycardia or VF. Notably, the results of preliminary electropharmacologic studies in these canine models parallel closely those findings reported in human patients with sustained life-threatening ventricu lar tachyarrhythmias (Table Ill). Therefore, increased use of these chronic models for new antiarrhythmic drug testing is strongly recommended. TABLE II Ideal vs Available Chronic Canine - Arrhythmia Models Ideal Available 1. (a) Arrhythmia mechanism comparable to Yes patients with chronic CAD: Reentry (b) Pathophysiology similar (e. g. , atherogenic CAD) No 2. Susceptible to: (a) spontaneous PVCs No l No (b) spontaneous VT/VF (c) inducible VT/VF Yes 3.
Author: J. Morganroth Publisher: Springer Science & Business Media ISBN: 9400982704 Category : Medical Languages : en Pages : 324
Book Description
Thus, there are now several chronic canine myocardial infarction ventricular tachyarrhythmia models which are available for the evaluation of new antiarrhythmic drugs (Table I). The available models fulfill many, but not all of the requirements for an ideal chronic arrhythmia model (Table 11). The sustained arrhythmias initiated in these models using programmed pacing presumably have the same localized reentrant mechanism that characterizes chronic human myocardial infarction and chronic coronary 26 artery disease. However, these models are not suitable for determining whether a new drug will abolish spontaneous ly-occurring PVCs. In addition, these models are of unproven value in the study of acute spontaneously occurring sudden death; although recently initiated, provocative work may shed further light on this subject. Most importantly, the available models do seem well-suited to the evaluation of new drugs intended for use in chronic coronary artery disease patients at risk for sustained reentrant ventricular tachycardia or VF. Notably, the results of preliminary electropharmacologic studies in these canine models parallel closely those findings reported in human patients with sustained life-threatening ventricu lar tachyarrhythmias (Table Ill). Therefore, increased use of these chronic models for new antiarrhythmic drug testing is strongly recommended. TABLE II Ideal vs Available Chronic Canine - Arrhythmia Models Ideal Available 1. (a) Arrhythmia mechanism comparable to Yes patients with chronic CAD: Reentry (b) Pathophysiology similar (e. g. , atherogenic CAD) No 2. Susceptible to: (a) spontaneous PVCs No l No (b) spontaneous VT/VF (c) inducible VT/VF Yes 3.
Author: J. Morganroth Publisher: Springer Science & Business Media ISBN: 1461325951 Category : Medical Languages : en Pages : 359
Book Description
In summary, there are many animal models that are useful in selecting new antiarrhythmic drugs. The selection of which model is most idea depends upon precisely what question is being asked. The large number of experimental models used to evaluate antiarrhythmic compounds points out the inability of anyone model to define the probability of antiarrhythmic efficacy in man. It has therefore become standard practice to utilize a batter of animal models for the evaluation of new antiarrhythmic agents. Each model has its own advantages and disadvantages and it is necessary to understand each model fully in oder to evaluate experimental findings and apply them to clinical settings. We believe that the availability of the chronic myocardial infarction ventricular tachyarrhythmia model provides 1) an excellent opportunity to more precisely understand arrhythmia mechanisms, 2) to develop new techniques such as signal averaging for evaluating late low level potentials identifying hearts at high risk of sudden death 3) to identify new antifibrillatory drugs versus drugs that are effective primarily against PVC's and ventricular tachycardia 4) to identify new surgical techniques to eliminate VT/VF, and 5) to evaluate new pacing modalities including implantable cardioverters. Although all animal models are wrong, many are very useful in furthering our knowledge directed at decreasing the distressingly high mortality from heart disease. NORMAL HtART TACHYCMDIA HtART , .. '" \ I I I I I I I I I .
Author: Peter P. Nanasi Publisher: Frontiers Media SA ISBN: 2889639967 Category : Medical Languages : en Pages : 241
Book Description
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author: Constantine Mavroudis Publisher: John Wiley & Sons ISBN: 1119282306 Category : Medical Languages : de Pages : 1124
Book Description
Der Bereich der pädiatrischen Herz- und Gefäßchirurgie umfasst nicht nur die Herzchirurgie bei Säuglingen und Kindern, sondern auch die Herzchirurgie bei Erwachsenen zur Korrektur von angeborenen Herzfehlern. Da die Kindersterblichkeit aufgrund von Herzfehlern zurückgeht und Patienten mit angeborenen Herzfehlern zunehmend ein langes, gesundes Leben führen, ergeben sich neue Herausforderungen. Somit war der Bedarf an Einführungen in diesen lebensrettenden Bereich noch nie so groß. Pediatric Cardiac Surgery ist ein gut verständliches, umfassendes Lehrbuch, das diesen Bedarf seit über dreißig Jahren erfüllt und von Fachleuten auf allen Ebenen genutzt wird. Das Lehrwerk, das zahlreiche farbige Abbildungen enthält, bietet zunächst eine wissenschaftliche Einführung in die kardiovaskuläre Entwicklung und dann detaillierte Analysen von Defekten in verschiedenen Bereichen des Herzens mit den entsprechenden Verfahren zur Korrektur dieser Defekte. Die aktualisierte fünfte Auflage berücksichtigt die neuesten wissenschaftlichen Erkenntnisse und bleibt damit ein unverzichtbares Werk zu diesem Thema. Die fünfte Auflage von Pediatric Cardiac Surgery enthält unter anderem: * Beiträge von über 75 nationalen und internationalen Experten auf dem Gebiet * Beeindruckende anatomische Illustrationen von Rachid Idriss * Neue Kapitel, in denen der neueste Stand der Forschung dargestellt wird, sowie neue Inhalte in Bezug auf die kardiale Bildgebung und die medizinische Ausbildung Pediactric Cardiac Surgery ist ein wichtiges Nachschlagewerk für Herzchirurgen, die sich auf Kinder und Erwachsene spezialisiert haben, Kardiologen und alle medizinischen Fachkräfte, die mit pädiatrischen oder erwachsenen Herzpatienten arbeiten.
Author: Raymond Woosley Publisher: CRC Press ISBN: 9780824781644 Category : Medical Languages : en Pages : 0
Book Description
This vitally important reference traces the progress of antiarrhythmic drug trials and treatment methods-from the vantage point of the clinicians who designed and conducted the studies to objective views of the strengths and weaknesses of the results, identifying unresolved questions or newly created issues. Reviews significant studies in chronological order-providing a clear, informative account of how current thinking about arrhythmia treatment has evolved. Written by over 35 leading experts in the field, Clinical Trials on the Treatment of Arrhythmias emphasizes the need for science-based therapeutics and rigorously controlled clinical trials of drugs and implantable devices compares electrocardiographic monitoring with electrophysiological techniques for arrhythmia management analyzes the landmark Cardiac Arrhythmia Suppression Trial (CAST) evaluates the effectiveness of amiodarone describes sodium and potassium channel blockers and the development of drugs that slow conduction velocity and prolong repolarization and refractoriness investigates the effects of the d-isomer of sotalol on mortality critiques studies on the established efficacy of implantable devices versus amiodarone to benefit post-bypass surgery patients and more! Containing over 600 literature citations, Clinical Trials on the Treatment of Arrhythmias is an invaluable resource for cardiologists and cardiovascular specialists, pharmacologists, pharmaceutical researchers, and graduate and medical school students in these disciplines.
Author: Richard N. Fogoros, MD Publisher: Wiley-Blackwell ISBN: 9780865425323 Category : Medical Languages : en Pages : 192
Book Description
An introduction to cardiac arrythmias and their treatment, Antiarrhythmic Drugs: A Practical Guide offers a concise, easily understood framework enabling the reader to become confident in the evaluation and treatment of patients with cardiac arrhythmias. Because most clinicians, technicians and nurses find this area confusing, both in terms of diagnosis and management, this manual provides a route map for understanding mechanisms and selecting appropriate drug therapies. Focusing on the choice of drug for specific conditions, this book covers dosages, interactions and side effects.
Author: J. Morganroth
Author: J. Morganroth
Author: Joel Morganroth
Author: 
Author: United States. Food and Drug Administration
Author: J. Morganroth
Author: Peter P. Nanasi
Author: Constantine Mavroudis
Author: Francesco Furlanello
Author: Raymond Woosley
Author: Richard N. Fogoros, MD