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Recurrence of atrial fibrillation within three months of an ablation is seen in most patients, but many of those patients become free of atrial fibrillation in the long term. [17] For this reason the first three months after an ablation are described as the "blanking period," during which no further intervention is to be attempted. [17]
Atrial fibrillation frequently results from bursts of tachycardia that originate in muscle bundles extending from the atrium to the pulmonary veins. [4] Pulmonary vein isolation ablation technology has used thermal methods (radiofrequency ablation or, less often, cryoablation) to destroy pulmonary vein cells. [5]
Atrial fibrillation is associated with an increased risk of heart failure, dementia, and stroke. [3] [12] It is a type of supraventricular tachycardia. [14] Atrial fibrillation frequently results from bursts of tachycardia that originate in muscle bundles extending from the atrium to the pulmonary veins. [15]
Oftentimes, people with AF start with what are called paroxysmal events, which means AF suddenly comes and goes, lasting less than a week at a time, probably because the tissue is still relatively healthy. Repeated paroxysmal events that occur over longer periods of time, though, tend to stress the atrial cells even more.
Atrial fibrillation: Red dots show atrial fibrillation activity. Atrial fibrillation meets the definition of SVT when associated with a ventricular response greater than 100 beats per minute. It is characterized as an "irregularly, irregular rhythm" both in its atrial and ventricular depolarizations and is distinguished by its fibrillatory ...
Future episodes can be prevented by catheter ablation. [3] About 2.3 per 1000 people have paroxysmal supraventricular tachycardia. [5] Problems typically begin in those 12 to 45 years old. [3] [5] Women are more often affected than men. [3] Outcomes are generally good in those who otherwise have a normal heart. [3]
[5] [9] For TIC due to atrial flutter, rate control is often difficult to achieve, and RF catheter ablation has a relatively high success rate with a low risk of complications. [5] In patients with TIC due to other types of SVT, RF catheter ablation is recommended as a first-line treatment. [5]
Radiofrequency ablation (RFA), also called fulguration, [1] is a medical procedure in which part of the electrical conduction system of the heart, tumor, sensory nerves or a dysfunctional tissue is ablated using the heat generated from medium frequency alternating current (in the range of 350–500 kHz).