Cardioversion of atrial fibrillation

TYPES OF ARRHYTHMIAS During a rapid cardiac arrhythmia, an abnormal fast electrical mechanism overrides the action of the sinus node.Our mission is to reduce the burden of cardiovascular disease through percutaneous cardiovascular interventions.We use cookies to optimise the design of this website and make continuous improvement.When atrial fibrillation has been present for more than five years, success rates are only approximately 50 percent (9).Under normal conditions, the electrical impulses are generated from an area of specialized pacemaker cells called the sinus node, located in the right atrium (the upper right chamber of the heart).In a review including 985 cardioversions in 840 patients with atrial flutter, the median energy level for successful cardioversion was 50 joules with a biphasic defibrillator and 200 joules with a monophasic defibrillator (26).In one series of 1,838 direct current cardioversions, success rates, when the duration of AF was 180 days was 84, 78, 77, and 66 percent, respectively (8).Patients who receive sedation cannot drive for at least 24 hours.Despite such significant advantages, the spread of this new methodology in clinical practice has been limited by the need of a laboratory of electrophysiology with fluoroscopy and of specific technical competence for lead positioning, either in the coronary sinus or in the left pulmonary artery.

Early recurrences of atrial fibrillation after electrical cardioversion: A result of fibrillation-induced electrical remodeling of the atria Tieleman, RG, Van Gelder, IC, Crijns, HJGM, et al.The estimated incidence of thromboembolism varies, but in a large non-randomised series that included 437 patients, embolism occurred in 5.3 % of non-anticoagulated patients compared to 0.8 % of those receiving anticoagulation (49).Anticoagulation is also given prior to and after cardioversion, as it is in patients with AF.

Atrial fibrillation electrical cardioversion - wikidoc

Weinberg, MD, and G.B. John Mancini, MD A trial fibrillation (AF) is a common arrhythmia.Guides you through decision to have cardioversion for atrial fibrillation.

Atrial fibrillation: strategies to control, combat, and cure.Most patients are given an anticoagulant (a blood thinner such as warfarin (sample brand name: Coumadin) or one of the newer oral anticoagulants) for at least three to four weeks before and after cardioversion to prevent an embolism unless the AF has been present for less than a day or two.If you have atrial fibrillation (Afib or AF), your care team will likely be led by cardiologist or even a specially trained cardiologist called an electrophysiologist.

Atrial fibrillation: strategies to control, combat, and cure

These articles are best for patients who want in-depth information and are comfortable with some medical jargon.Assessment of Cardioversion Using Transesophageal Echocardiography Investigators.Cardioversion Of Atrial Fibrillation And Oral Anticoagulation.CARDIOVERSION FOR SPECIFIC ARRHYTHMIAS As mentioned above, cardioversion is useful for terminating arrhythmias that arise from a reentry circuit.Currently, most evidence favors the use of biphasic external defibrillators due to their categorically lower energy requirements and greater efficacy (14,15).

Who should have an afib catheter ablation and the impact of antiarrhythmic drugs and blood clots on having this atrial fibrillation treatment.

Defibrillation and cardioversion -

#90821: Clinical Management of Atrial Fibrillation -

Pharmacological prevention of atrial tachycardia induced atrial remodeling as a potential therapeutic strategy.A new algorithm for transthoracic cardioversion of atrial fibrillation based on body weight.

Biphasic waveforms may be of special interest in patients who have failed to revert with the use of monophasic waveforms (17).Each time the impulse cycles through the re-entrant circuit, it activates the heart, causing another contraction.Propafenone: Compared with placebo, propafenone did not influence either the mean defibrillation threshold or the rate of conversion (shock efficacy 84% vs. 82%, respectively) but suppressed immediate recurrences (within 10 min), and 74% versus 53% of patients were in sinus rhythm after 2 days(59).When the reentrant circuit is broken and the arrhythmia stops, the sinus node begins to fire again and a normal heart rhythm is restored.Low energy intracardiac cardioversion of persistent atrial fibrillation.High energy transcatheter cardioversion of chronic atrial fibrillation.The content on the UpToDate website is not intended nor recommended as a substitute.Treatment before the cardioversion will allow time for the medication to get into the bloodstream, which may prevent a recurrence of AF.

This can be repeated until the arrhythmia terminates or the decision is made to abandon direct current cardioversion.Levy S, Lauribe P, Dolla E, Kou W, Kadish A, Calkins H, Pagannelli F, Moyal C, Bremondy M, Schork A, et al.Many kinds of arrhythmias, especially ventricular and supraventricular premature beats, bradycardia, sinus arrest, may arise following cardioversion and commonly subside spontaneously (50).However, post-cardioversion, potential life-threatening complications such as post-cardioversion arrhythmias and thromboembolism remain a possibility.

Cardioversion & Atrial Fibrillation

Atrial fibrillation is the most common sustained arrhythmia in clinical practice.In patients who were overweight or obese, first-shock success was significantly greater if a higher-energy shock was selected.

Float Nurse: Cardioversion

Comparative efficacy of monophasic and biphasic waveforms for transthoracic cardioversion of atrial fibrillation and atrial flutter.This high-energy impulse activates all of the cardiac muscle and conduction tissue simultaneously.It seems to us that you have your JavaScript turned off on your browser.Cardioversion and digitalis drugs:changed threshold to electric shock in digitalized animals.

Atrial Fibrillation -