CARDIAC ARRHYTHMIAS PHARMACOLOGY PDF DOWNLOAD

Types of Arrhythmias. Arrhythmias can be divided into three categories: altered rate, premature beats and altered conduction. Pharmacology of Arrhythmia. It is obvious that interest in arrhythmia treatment is turning toward new devices and ablation techniques, and it is, of course, certain. Types of Arrhythmias. Arrhythmias can be divided into three categories: altered rate, premature beats and altered conduction.


CARDIAC ARRHYTHMIAS PHARMACOLOGY PDF DOWNLOAD

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CARDIAC ARRHYTHMIAS PHARMACOLOGY PDF DOWNLOAD


Antiarrhythmic Drugs Normal Heart Rhythm Normal heart rhythm is generated and driven by the spontaneous firing of pacemakers cells of the sinoatrial SA node located in cardiac arrhythmias pharmacology posterior wall of the right atrium.

These cells have an intrinsic firing rate of depolarizations per second.

However, this intrinsic rate is under the control of autonomic nerves, which may either increase or decrease this rate. At rest, the sinoatrial rate, and therefore heart rate when cardiac arrhythmias pharmacology heart is in sinus rhythm i.

This reduced resting rhythm is due to vagal tone.

CARDIAC ARRHYTHMIAS PHARMACOLOGY PDF DOWNLOAD

For cardiac arrhythmias pharmacology latter ventricular arrhythmias, DPH is usually considered only after other antiarrhythmic drug therapy has failed. In the case of AV block, drugs that block vagal influences e. AV block can occur during beta-blocker treatment and therefore simply removing a beta-blocker in patients being treated with such drugs may normalize AV conduction.

Sometimes ventricular rate is excessively high because it is being driven by atrial flutter or fibrillation. cardiac arrhythmias pharmacology

Because it is very important to reverse ventricular tachycardia, drugs are often used to slow AV nodal conduction. Calcium channel blockers and beta-blockers are useful for this indication.

CARDIAC ARRHYTHMIAS PHARMACOLOGY PDF DOWNLOAD

Digitalis, because of its ability to activate the vagus nerve parasympathomimetic effectcan also be used to reduce AV conduction velocity in an attempt to normalize ventricular rate during atrial flutter or fibrillation.

Classes of Drugs Used to Treat Arrhythmias Classes of drugs used in the cardiac arrhythmias pharmacology of arrhythmias are given below.

CARDIAC ARRHYTHMIAS PHARMACOLOGY PDF DOWNLOAD

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