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Home arrow Medical Procedures arrow Cardiac Procedures arrow Cardioversion
Cardioversion

Cardioversion

 

1. In synchronized electrical cardioversion a cardiac arrhythmia (abnormally fast heart rate - Atrial fibrillation ) is terminated by the delivery of a therapeutic dose of electrical current to the heart at a specific moment in the cardiac cycle.

2. In pharmacologic cardioversion, medication is used instead of an electrical shock to convert the cardiac arrhythmia (abnormally fast heart rate).

 

Atrial fibrillation (AF or afib) 

Atrial fibrillation - Healthbase
P waves, which represent depolarization of the atria, are irregular or absent during atrial fibrillation.

Atrial fibrillation is a cardiac arrhythmia (abnormal heart rhythm)  involving the two upper chambers (atria) of the heart.

Atrial fibrillation is the most common arrhythmia. The  risk increases with age, with 8% of people over 80 having AF. 

In atrial fibrillation, the electrical impulses that are normally generated by the sinoatrial node are replaced by disorganized activity in the atria, leading to irregular conduction of impulses to the ventricles that generate the heartbeat resuling in an irregular heartbeat. 

Atrial fibrillation may be continuous (persistent or permanent AF) or alternating between periods of a normal heart rhythm (paroxysmal AF).


The natural tendency of atrial fibrillation is to become a chronic condition.  

Atrial fibrillation is often asymptomatic (the patient does not experience any noticeable symptoms), and is not in itself generally life-threatening, but may result in :

palpitations,

fainting,

chest pain, or congestive heart failure.

Patients with atrial fibrillation are at significantly increased chance of stroke (about 2 to 7 times the regular population), and AF is a leading cause of stroke. 

Atrial fibrillation may be treated with medications (pharmacologic cardioversion) which either slow the heart rate or revert the heart rhythm back to normal.

Synchronized electrical cardioversion may also be used to convert AF to a normal heart rhythm.

Surgical and catheter-based therapies may also be used to prevent recurrence of atrial fibrillation in certain individuals.

People with AF are often given anticoagulants such as warfarin to protect them from stroke. 

 

 

 

 
 
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