ANTIDYSRHYTHMIC DRUGS PDF

Antidysrhythmic agents, which are also known as antiarrhythmic agents, are a broad category of medications that help ameliorate the spectrum of cardiac. The ultimate goal of antiarrhythmic drug therapy is to restore normal rhythm and conduction. When it is not possible to revert to normal sinus rhythm, drugs may. Antidysrhythmic Drugs: Amiodarone, Digoxin, Disopyramide, Flecainide, Lidocaine, Procainamide, Quinidine answers are found in the Davis’s Lab & Diagnostic.

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This site uses cookies. Wikipedia articles needing page number citations from January All articles with dead external links Articles with dead external links from November Wikipedia articles drufs NDL identifiers. Prevents paroxysmal atrial fibrillation Treats recurrent tachyarrhythmias of abnormal conduction system Contraindicated immediately after myocardial infarction.

By prolonging the effective refractory period, reentry tachycardias can often be abolished. Class I agents block the rapid inward sodium channel, slow the rate of rise of phase 0, and so decrease the rate of depolarization. These drugs typically affect potassium channels and delay repolarization of action potentials phase 3.

Vaughan Williams Classification of Antidysrhythmic Drugs |

Indications They are used to treat dysrhythmias, and some classes are also used in the treatment of angina and hypertension. Emollients Cicatrizants Antidysrhythmid Antipsoriatics Medicated dressings. Classes of drugs used in the treatment of arrhythmias are given below. Many attempts have been made to classify antiarrhythmic agents.

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Vaughan Williams Classification of Antidysrhythmic Drugs

Clinical Sports Medicine Collection. Lidocaine Phenytoin Mexiletine Tocainide. Interactions Are unique to each individual drug but can include the potentiation of anticoagulent activity with warfarin coumadin. About MyAccess If your institution subscribes to this resource, and you don’t have a MyAccess Profile, please contact your library’s reference desk for information on how to gain access to this resource from off-campus. Mechanism of Action Antidysrhythmic drugs work by correcting abnormal cardiac function.

Antiarrhythmic agents Cardiac electrophysiology.

Antiarrhythmic agent

Those proposed in were: Class II agents are conventional beta blockers. Abnormal conduction is usually due to conduction block or a reentry phenomenon, with the latter being the most common cause of dysrhythmias. Retrieved from ” https: By using this site, you agree to the Terms of Use and Privacy Policy. Triggered activity, or after-depolarization, occurs during the early stages after depolarization, such as in phase 2 and 3, or in the later stage during phase 4.

British Journal of Pharmacology. Freeman, and Jeffrey S.

Clicking on the drug class will link you to the page describing the pharmacology of that drug class and specific drugs. Pharmacology and the nursing process 5th ed.

View Table Favorite Table Download. The ultimate goal of antiarrhythmic drug therapy is to restore normal rhythm and conduction.

Class I agents are divided into three groups Ia, Ib, and Ic based upon their effect on the length of the action potential. Another approach, known as the “Sicilian gambit”, placed a greater approach on the underlying mechanism.

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These agents are particularly useful in the antidysrhytbmic of supraventricular tachycardias. Please enter Password Forgot Username?

When it is not possible to revert to normal sinus rhythm, drugs may be used to prevent more serious and possibly lethal arrhythmias from occurring. Please enter User Name. Class I drugs work on sodium channels, and are subdivided in a, b, and c classes. Drugs that block slow inward calcium channels are used to reduce pacemaker firing rate by slowing antidysehythmic rate of rise of depolarizing pacemaker potentials phase 4 depolarization.

Antiarrhythmic agent – Wikipedia

Otherwise it is hidden from view. Atropine Disopyramide Quinidine muscarinic agonist: Class I agents are called membrane-stabilizing agents. Used in supraventricular arrhythmias, especially in heart failure with atrial fibrillation, contraindicated in ventricular arrhythmias. Class IV agents include verapamil and diltiazem. Antidysrhythmic agents, which are also known as antiarrhythmic agents, are a broad category of medications that help ameliorate the spectrum of cardiac arrhythmias to maintain normal rhythm and conduction in the heart.

Sometimes anidysrhythmic rate is excessively high because it is being driven by atrial flutter or fibrillation.