Abstract
Cardiac arrhythmias are a major cause of morbidity and mortality in the industrialized world. Among their treatment regimens one can find the calcium channel antagonists (CCAs), the class IV agents. In the cardiovascular system L- and T-type calcium channels are found on vascular smooth muscle cells and cardiac myocytes with well defined physiological roles. Inhibition of calcium channels by CCAs has widely been used in clinical practice for several decades. Cardiovascular disorders are one of the many fields of medicine in which CCAs are used for various reasons and conditions. The three main indications of them are hypertension, angina and various cardiac arrhythmias. The most important classes of CCAs are dihydropyridines, phenylalkylamines and benzothiazepines but some newer compounds do not fall into any of these major classes. Dihydropyridines are not used in the antiarrhythmic therapy but are good vasodilators and antianginal agents. In contrast, phenylalkylamines and benzothiazepines exert cardiac actions in vivo and therefore these are one choice of antiarrhythmic drugs. This review focuses on phenylalkylamines, benzothiazepines and on new drugs with potential antiarrhythmic action in the heart as well as the mechanisms how calcium channels antagonism can lead to an antiarrhythmic action.
Keywords: Action potential, antiarrhythmic drugs, benzothiazepine, calcium channel, calcium channel antagonist, cardiac arrhythmia, cardiac ion currents, phenylalkylamine.
Current Pharmaceutical Design
Title:Class IV Antiarrhythmic Agents: New Compounds Using an Old Strategy
Volume: 21 Issue: 8
Author(s): Norbert Szentandrassy, Denes Nagy, Bence Hegyi, Janos Magyar, Tamas Banyasz and Peter P. Nanasi
Affiliation:
Keywords: Action potential, antiarrhythmic drugs, benzothiazepine, calcium channel, calcium channel antagonist, cardiac arrhythmia, cardiac ion currents, phenylalkylamine.
Abstract: Cardiac arrhythmias are a major cause of morbidity and mortality in the industrialized world. Among their treatment regimens one can find the calcium channel antagonists (CCAs), the class IV agents. In the cardiovascular system L- and T-type calcium channels are found on vascular smooth muscle cells and cardiac myocytes with well defined physiological roles. Inhibition of calcium channels by CCAs has widely been used in clinical practice for several decades. Cardiovascular disorders are one of the many fields of medicine in which CCAs are used for various reasons and conditions. The three main indications of them are hypertension, angina and various cardiac arrhythmias. The most important classes of CCAs are dihydropyridines, phenylalkylamines and benzothiazepines but some newer compounds do not fall into any of these major classes. Dihydropyridines are not used in the antiarrhythmic therapy but are good vasodilators and antianginal agents. In contrast, phenylalkylamines and benzothiazepines exert cardiac actions in vivo and therefore these are one choice of antiarrhythmic drugs. This review focuses on phenylalkylamines, benzothiazepines and on new drugs with potential antiarrhythmic action in the heart as well as the mechanisms how calcium channels antagonism can lead to an antiarrhythmic action.
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Cite this article as:
Szentandrassy Norbert, Nagy Denes, Hegyi Bence, Magyar Janos, Banyasz Tamas and Nanasi Peter P., Class IV Antiarrhythmic Agents: New Compounds Using an Old Strategy, Current Pharmaceutical Design 2015; 21 (8) . https://dx.doi.org/10.2174/1381612820666141029105910
DOI https://dx.doi.org/10.2174/1381612820666141029105910 |
Print ISSN 1381-6128 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4286 |
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