[答]所谓特发性房颤是指心脏无器质性病变时的房颤。目前认为此类房颤多数可能由自主神经功能紊乱所致,其它体液因素等也可参与。当自主神经功能紊乱时,心肌不应期缩短或兴奋传导速度减慢,可能是诱发或导致房颤的机制。此类房颤的特 [A] The so-called idiopathic atrial fibrillation is the heart of atrial fibrillation without organic disease. At present, most of these atrial fibrillation may be caused by autonomic dysfunction, other body fluids and other factors may also be involved. When autonomic dysfunction, myocardial refractory period shortening or slowing of the conduction velocity, may be induced or lead to atrial fibrillation mechanism. This type of atrial fibrillation