The ‘overly-sensitive’ heart: sodium channel block and QRS interval prolongation
نویسندگان
چکیده
منابع مشابه
Sodium Channel Block and Action Potential Prolongation
Antiarrhythmic drugs have been reported to produce variable effects on defibrillation energy requirements. However, the relation between the in vitro electrophysiologic effects of these agents and the changes in defibrillation energy requirements have not been systematically examined. Therefore, we evaluated the effects of the sodium channel blocking drugs lidocaine and procainamide, the action...
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BACKGROUND AND PURPOSE Understanding drug effects on the heart is key to safety pharmacology assessment and anti-arrhythmic therapy development. Here our goal is to demonstrate the ability of computational models to simulate the effect of drug action on the electrical activity of the heart, at the level of the ion-channel, cell, heart and ECG body surface potential. EXPERIMENTAL APPROACH We u...
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BACKGROUND Liver cirrhosis is associated with functional abnormalities of the cardiovascular system with co-existing electrocardiographic (ECG) abnormalities. OBJECTIVES The aim was to analyze ECG changes in patients with cirrhosis, to evaluate whether alcoholic etiology of cirrhosis and ascites has an impact on ECG changes. MATERIAL AND METHODS The study involved 81 patients with previousl...
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A 68-year-old woman was admitted to our hospital due to sudden onset of dyspnea. On admission, electrocardiogram (ECG) showed T-wave inversion and QRS prolongation (120 msec) that were not found in her previous ECG. Chest X-ray showed pulmonary edema and cardiac enlargement. Left ventriculogram showed akinesis of the left ventricle except in the basal region. No significant coronary stenosis wa...
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Background: Cirrhosis as the final stage of progressive fibrosis of liver can affect other organs such as lungs, kidneys and heart. "Cirrhotic cardiomyopathy" involves the electrophysiological abnormalities such as QT interval prolongation. We assessed correlation between corrected QT interval prolongation and severity of cirrhosis based on Child Classification in each ECG lead. ...
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ژورنال
عنوان ژورنال: British Journal of Pharmacology
سال: 2011
ISSN: 0007-1188
DOI: 10.1111/j.1476-5381.2011.01433.x