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Atrial Fibrillation In Endurance Athletes Still Poses Problems For Sports Cardiologis
10-12-2009, 08:31 PM (Acest mesaj a fost modificat ultima dată: 10-12-2009 08:31 PM de razvi.)
Mesaj: #1
Atrial Fibrillation In Endurance Athletes Still Poses Problems For Sports Cardiologis
The answering which so many people increasingly derive from competitive sports and tenacity training comes with a actual - even if rare - analysis. Because, while most people desire take to the benefits and pleasures of drive up the wall, there are a few through despite whom hourly athletic training will increase the risk of cardiac arrhythmias and even rash undoing, especially entirety those in middle-age or with pre-existing cardiac diseases.

“It’s for this reason that sports medicine has focused on pre-participation screening,” says Dr Luis Mont from the Hospital Clínic de Barcelona, Spain, “in an crack to detect any unseen soul disability.” On the other hand, disturbances in heart time, particularly atrial fibrillation, which represent one of the major cardiovascular reasons repayment for hospital confession, is more prosaic amid cyclists, marathon runners and other athletes with a elongated description of endurance training.

Dr Mont reports that atrial fibrillation is more frequent in mid-point-venerable individuals who formerly took part in competitive sports and continue to be agile, or simply in those involved in regular endurance training without having in truth participated in competitive sports. “So we from to look at the effects of endurance or athletic training with a more open view,” says Dr Mont.

Manner, he adds that the bring in-effectiveness of routine pre-participation screening in a expansive population of athletes and stick-to-it-iveness sports participants has not yet been clarified. A debate on the subject takes place at this Congress on Sunday 21st June at 16.00.

What does seem clearer, to whatever manner, is that lengthy-name endurance sport participation may well increase the incidence of cardiac arrhythmias, particularly atrial fibrillation, atrial flutter, sinus node dysfunction, and right ventricular premature beats. “Given the fact that an increasing mass of individuals secure in regular persistence sports,” says Dr Mont, “it is certainly of great captivate to define which recommendations for sport should be implemented in an individual untiring, and how best to preside over arrhythmias in participants.” Atrial fibrillation is the most commonplace arrhythmic ready, and sudden cardiac demise remains a risk.

Three papers presented at this congress by Dr Mont’s sort reflect the research strain now being directed towards sports cardiology and the prevention and treatment of pulse disorders.

1. Efficacy of the circumferential pulmonary vein ablation of atrial fibrillation in patience athletes. CPVA is a recently introduced adroitness which identifies the signals causing the atrial fibrillation and isolates their provenience in the pulmonary veins from the left ventricle of the callousness. The technique has been successfully used in routine patients with atrial fibrillation and, according to new data presented here in Berlin, is now as effective in AF non-critical to endurance sports as in other causes. A series of 182 patients in Dr Mont’s Barcelona clinic ground that freedom of arrhythmias following CPVA was similar in the sports participants as in the consummate patients. Left atrial measure and long-standing atrial fibrillation were the only independent predictors for the sake of arrhythmia recurrence after the treatment, not sports participation.

2. Deconditioning reverses aspect of cardiac fibrosis markers in an animal exemplar of endurance training. A more root art study from Dr Mont’s crowd in Barcelona also suggests that those with a history of arrhythmias following stick-to-it-iveness training may benefit from a period of “deconditioning” following their efforts. The blue follows a study in animal models which start that markers of cardiac fibrosis in rats whose treadmill exercise was followed by a period of inactivity returned to control levels. Durability exercise causes cardiac structural changes, including atrial and right ventricular fibrosis - and this fibrosis may conduct oneself a capacity in the development of arrhythmias. Although it has been famous that the athlete’s heart regresses after inactivity it is not known if the sport-induced atrial and right ventricular fibrosis also reverses after deconditioning. This study suggests that it does and that a years of inactivity might be of benefit in those with a telling of fibrillation.

3. Losartan attenuates resolution fibrosis induced by lingering endurance training in an animal model. Objective as inactivity after training may inhibit cardiac fibrosis in monster models, a similar study suggests that the anti-hypertensive psychedelic losartan prevents the heart fibrosis induced by continuation exercise. The anti-fibrotic implication of losartan, an angiotensin type-II receptor adversary, appears to be mediated concealment of angiotensin II-induced rise of fibroblasts. Again, markers of fibrosis were reduced by administration of losartan.

Notes:

1. EHRA, the European Determination Rhythm Association, aims to serve as the pre-eminent organisation in the green of arrhythmias and electrophysiology in Europe, and to attract physicians from all of Europe and beyond to take care of the occurrence of this area of knowledge. EHRA is a registered branch of the European Society of Cardiology (ESC). EHRA is based in Sophia Antipolis, France.

2. The European Institute of Cardiology (ESC) represents more than 50,000 cardiology professionals across Europe and the Mediterranean. Its mission is to decrease the burden of cardiovascular disease in Europe.

3. Cardiac arrhythmia describes conditions in which heart beat is too fast, too slow, or irregular. The motive is abnormal electrical vocation in the soul. Some arrhythmias may be life-impending and result in impulsive cardiac death. The average healthy spunk beats 200,000 times per day.

4. The most mean arrhythmia (after a skipped beat) is atrial fibrillation, which affects up to 5 per cent of all adults, in the main the once more-65s.

5. Unconditional systematic programme of EUROPACE 2009

Source:
ESC Press Room
European Polite society of Cardiology
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