Health Worlds

Atrial fibrillation is what causes?1. Organic heart disease
(1) Rheumatic heart disease: Atrial fibrillation causes about 33.7% to more common in mitral stenosis and regurgitation.
(2) coronary heart disease: coronary heart disease confirmed by coronary angiography angina, atrial fibrillation, the incidence rate of 1.5%, atrial fibrillation with old myocardial infarction was 3.8%; the incidence of acute myocardial infarction was 8.2% and coronary angiography because of chest pain and normal coronary arteries, atrial fibrillation rate was 11%, in short, the incidence of coronary heart disease is low.
(3) hypertensive heart disease: the atrial muscle of many small arteries may be due to intimal thickening and stenosis or occlusion, the regional myocardial ischemic changes and fibrosis.
(4) of hyperthyroidism: a focal early myocardial necrosis and lymphocyte infiltration, the course for a long time often has a small limitation of myocardial fibrosis, the rate was 5%, more common in patients 40 to 45 years, youth were less likely to see, Even more than the paroxysmal occurrence.
(5) sick sinus syndrome: when the sinus node artery dysplasia with focal muscle fiber structure, structural abnormalities of collagen and the surrounding sinus degeneration, particularly around the denaturation of sinus node and sinus impulse exception, can contribute to the incidence of atrial fibrillation.
(6) cardiomyopathy: different types of heart disease, often due to the atria


l myocardium with focal inflammation, degeneration, or fibrosis, atrial enlargement easily lead to the occurrence of atrial fibrillation, including alcoholic heart disease in patients with atrial fibrillation is often starting performance of the high incidence.
(7) Other heart disease: such as pulmonary heart disease (incidence rate of 4% to 5%, mostly paroxysmal, respiratory function improved after the attack will be reduced); chronic constrictive pericarditis; congenital heart disease , atrial fibrillation, increased self-discipline are part of the focal origin of atrial fibrillation; and some parts of paroxysmal and persistent and chronic atrial fibrillation to atrial, pulmonary vein, vena cava caused by local micro-reentrant mechanism.
2. Preexcitation syndrome preexcitation syndrome may be due to the bypass in patients with refractory period is very short, once the reentry conditions established by the impulse to increase the bypass, this impulse and stress of reentry into the left atrium that is able to induce Atrial fibrillation, the incidence of pre-excitation atrial fibrillation was 11.5% to 39%, pre-excitation syndrome was considered in serious cases of atrial fibrillation, because the bypass is not as physical as the atrioventricular node conduction delay of the protective effect, therefore, the next channel downstream of the ventricular rate of more than 180 times / min or more, seriously affect the heart's cardiac output.(1) systemic invasive diseases: systemic lupus erythematosus, scleroderma, leukemia, amyloidosis, and so on.
(2) pulmonary and systemic infections and chronic pulmonary insufficiency.
(3) cardiac surgery and trauma.
(4) digitalis poisoning, Aconitum, nicotine and other toxic can induce atrial fibrillation.
(5) a variety of cardiac catheterization and transesophageal electric stimulation operation, electrical cardioversion can be directly induced by secondary surgery atrial fibrillation.
(6) alcohol and smoking, agitation, excessive smoking, urination, etc. can occur directly or induced atrial fibrillation on the basis of existing heart disease.
4. Department of mutations in familial atrial fibrillation caused by an AD genetic inheritance pattern, occurs mostly in adulthood, paroxysmal AF occurred unconsciously and termination of atrial fibrillation mild symptoms, and more from exertion , mental stress, infection, pain, drinking, smoking induced heart function remained normal, the general prognosis is good.
5. Unexplained healthy place idiopathic atrial fibrillation, without structural heart disease is often based.Currently considered part of the majority of paroxysmal atrial fibrillation and persistent or chronic (permanent) atrial fibrillation are the property of self-regulation increased the focal origin of atrial fibrillation; and some parts of paroxysmal and persistent and chronic atrial fibrillation as atrium, pulmonary veins, vena cava caused by local micro-reentrant mechanism.
1. Self-regulation increased the focal origin of atrial fibrillation can be triggered by atrial fibrillation in the majority of scholars believe that the focal abnormal electrical activity may enhance self-discipline or triggered activity and focal significant anatomical features, which are mostly located in the pulmonary vein focal , a few in other parts of the pulmonary veins, focal pacemaker cells exist, there are T, P cells and Purkinje cells.
(1) pulmonary vein: focal origin of focal atrial fibrillation triggers of atrial fibrillation about 95% in the bilateral superior pulmonary vein, which is located in the upper left pulmonary vein accounted for 48% to 51%, in the right superior pulmonary vein accounted for 26% to 44% in Bilateral inferior pulmonary vein accounted for 28%, in addition to the vast majority of patients with focal origin of atrial fibrillation, 68% of line two or more than two triggered within the pulmonary vein focal; or two focal pulmonary vein in the same team, only 32% in the single pulmonary vein, a feature that increases the difficulties of successful ablation.
(2) the superior vena cava: About 6% of patients with focal atrial fibrillation triggers in the superior vena cava, right atrium with focal at the junction of the superior vena cava (19


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